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Andreas Koch - Publications

Affiliations: 
Ruprecht-Karls-Universität Heidelberg, Heidelberg, Baden-Württemberg, Germany 
Area:
Galactic halos
Website:
https://zah.uni-heidelberg.de/de/service/personal/?tx_zahinfothek_staff%5Buid%5D=154&tx_zahinfothek_staff%5Baction%5D=show
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132 high-probability publications. We are testing a new system for linking publications to authors. You can help! If you notice any inaccuracies, please sign in and mark papers as correct or incorrect matches. If you identify any major omissions or other inaccuracies in the publication list, please let us know.

Year Citation  Score
2020 Kunder A, Pérez-Villegas A, Rich RM, Ogata J, Murari E, Boren E, Johnson CI, Nataf D, Walker A, Bono G, Koch A, Propris RD, Storm J, Wojno J. The Bulge Radial Velocity Assay for RR Lyrae Stars (BRAVA-RR) DR2: A Bimodal Bulge? The Astronomical Journal. 159: 270. DOI: 10.3847/1538-3881/Ab8D35  0.521
2020 Mosenkov A, Rich RM, Koch A, Brosch N, Thilker D, Román J, Müller O, Smirnov A, Usachev P. The haloes and environments of nearby galaxies (HERON) - II. The outer structure of edge-on galaxies Monthly Notices of the Royal Astronomical Society. 494: 1751-1770. DOI: 10.1093/Mnras/Staa678  0.341
2020 Reina-Campos M, Hughes ME, Kruijssen JMD, Pfeffer JL, Bastian N, Crain RA, Koch A, Grebel EK. The mass fraction of halo stars contributed by the disruption of globular clusters in the E-MOSAICS simulations Monthly Notices of the Royal Astronomical Society. 493: 3422-3428. DOI: 10.1093/Mnras/Staa483  0.68
2020 Rich RM, Johnson CI, Young M, Simion IT, Clarkson WI, Pilachowski C, Michael S, Kunder A, Vivas AK, Koch A, Marchetti T, Ibata R, Martin N, Robin AC, Lagarde N, et al. The Blanco DECam Bulge Survey. I. The Survey Description and Early Results Monthly Notices of the Royal Astronomical Society. DOI: 10.1093/Mnras/Staa2426  0.302
2020 Johnson CI, Rich RM, Young MD, Simion IT, Clarkson WI, Pilachowski CA, Michael S, Kunder A, Koch A, Vivas AK. Blanco DECam Bulge Survey (BDBS) II: Project Performance, Data Analysis, and Early Science Results Monthly Notices of the Royal Astronomical Society. DOI: 10.1093/Mnras/Staa2393  0.506
2020 Tempel E, Tuvikene T, Muru MM, Stoica RS, Bensby T, Chiappini C, Christlieb N, Cioni MRL, Comparat J, Feltzing S, Hook I, Koch A, Kordopatis G, Krumpe M, Loveday J, et al. An optimised tiling pattern for multi-object spectroscopic surveys: application to the 4MOST survey Monthly Notices of the Royal Astronomical Society. 497: 4626-4643. DOI: 10.1093/Mnras/Staa2285  0.301
2020 Cullinane LR, Mackey AD, Costa GSD, Koposov SE, Belokurov V, Erkal D, Koch A, Kunder A, Nataf DM. The Magellanic Edges Survey I: Description and first results Monthly Notices of the Royal Astronomical Society. 497: 3055-3075. DOI: 10.1093/Mnras/Staa2048  0.488
2020 Savino A, Koch A, Prudil Z, Kunder A, Smolec R. The age of the Milky Way inner stellar spheroid from RR Lyrae population synthesis Astronomy and Astrophysics. DOI: 10.1051/0004-6361/202038305  0.551
2020 Hanke M, Koch A, Prudil Z, Grebel EK, Bastian U. Purveyors of fine halos Astronomy & Astrophysics. 637: A98. DOI: 10.1051/0004-6361/202037853  0.707
2019 Watson D, Hansen CJ, Selsing J, Koch A, Malesani DB, Andersen AC, Fynbo JPU, Arcones A, Bauswein A, Covino S, Grado A, Heintz KE, Hunt L, Kouveliotou C, Leloudas G, et al. Identification of strontium in the merger of two neutron stars. Nature. 574: 497-500. PMID 31645733 DOI: 10.1038/S41586-019-1676-3  0.407
2019 Lora V, Grebel EK, Schmeja S, Koch A. Cold, Old, and Metal-poor: New Stellar Substructures in the Milky Way’s Dwarf Spheroidals The Astrophysical Journal. 878: 152. DOI: 10.3847/1538-4357/Ab1B71  0.658
2019 Rich RM, Mosenkov A, Lee-Saunders H, Koch A, Kormendy J, Kennefick J, Brosch N, Sales L, Bullock J, Burkert A, Collins M, Cooper M, Fusco M, Reitzel D, Thilker D, et al. The haloes and environments of nearby galaxies (HERON) – I. Imaging, sample characteristics, and envelope diameters Monthly Notices of the Royal Astronomical Society. 490: 1539-1569. DOI: 10.1093/Mnras/Stz2106  0.537
2019 Koch A, Côté P. An outer shade of Pal: Abundance analysis of the outer halo globular cluster Palomar 13 Astronomy and Astrophysics. 632. DOI: 10.1051/0004-6361/201936710  0.455
2019 Koch A, Xu S, Rich RM. Chemical composition of the outer halo globular cluster Palomar 15 Astronomy and Astrophysics. 627. DOI: 10.1051/0004-6361/201935467  0.534
2019 Müller O, Rich RM, Román J, Yıldız MK, Bílek M, Duc P, Fensch J, Trujillo I, Koch A. A tidal tale: detection of several stellar streams in the environment of NGC 1052 Astronomy and Astrophysics. 624. DOI: 10.1051/0004-6361/201935463  0.519
2019 Koch A, Grebel EK, Martell SL. Purveyors of fine halos: Re-assessing globular cluster contributions to the Milky Way halo buildup with SDSS-IV Astronomy & Astrophysics. 625: A75. DOI: 10.1051/0004-6361/201834825  0.713
2019 Hansen CJ, Hansen TT, Koch A, Beers TC, Nordström B, Placco VM, Andersen J. Abundances and kinematics of carbon-enhanced metal-poor stars in the Galactic halo. A new classification scheme based on Sr and Ba Astronomy and Astrophysics. 623. DOI: 10.1051/0004-6361/201834601  0.588
2019 Koch A, Reichert M, Hansen CJ, Hampel M, Stancliffe RJ, Karakas A, Arcones A. Unusual neutron-capture nucleosynthesis in a carbon-rich Galactic bulge star Astronomy & Astrophysics. 622: A159. DOI: 10.1051/0004-6361/201834241  0.547
2018 Piatti AE, Koch A. Search for an Intrinsic Metallicity Spread in Old Globular Clusters of the Large Magellanic Cloud The Astrophysical Journal. 867: 8. DOI: 10.3847/1538-4357/Aadfe1  0.556
2018 Kunder A, Mills A, Edgecomb J, Thomas M, Schilter L, Boyle C, Parker S, Bellevue G, Rich RM, Koch A, Johnson CI, Nataf DM. Radial Velocities of RR Lyrae Stars in and around NGC 6441 The Astronomical Journal. 155: 171. DOI: 10.3847/1538-3881/Aab42D  0.573
2018 Hollyhead K, Lardo C, Kacharov N, Bastian N, Hilker M, Rejkuba M, Koch A, Grebel EK, Georgiev I. Kron 3: a fourth intermediate age cluster in the SMC with evidence of multiple populations Monthly Notices of the Royal Astronomical Society. 476: 114-121. DOI: 10.1093/Mnras/Sty230  0.599
2018 François P, Caffau E, Bonifacio P, Spite M, Spite F, Cayrel R, Christlieb N, Gallagher AJ, Klessen R, Koch A, Ludwig HG, Monaco L, Plez B, Steffen M, Zaggia S. TOPoS. V. Abundance ratios in a sample of very metal-poor turn-off stars Astronomy and Astrophysics. 620. DOI: 10.1051/0004-6361/201834375  0.561
2018 Hanke M, Hansen CJ, Koch A, Grebel EK. ATHOS: On-the-fly stellar parameter determination of FGK stars based on flux ratios from optical spectra Astronomy & Astrophysics. 619: A134. DOI: 10.1051/0004-6361/201833351  0.574
2018 Koch A, Hanke M, Kacharov N. Kinematics of outer halo globular clusters: M 75 and NGC 6426 Astronomy and Astrophysics. 616. DOI: 10.1051/0004-6361/201833110  0.579
2018 Bonifacio P, Caffau E, Spite M, Spite F, Sbordone L, Monaco L, François P, Plez B, Molaro P, Gallagher AJ, Cayrel R, Christlieb N, Klessen RS, Koch A, Ludwig HG, et al. TOPoS. IV. Chemical abundances from high-resolution observations of seven extremely metal-poor stars Astronomy and Astrophysics. 612. DOI: 10.1051/0004-6361/201732320  0.569
2018 Koch A, Hansen TT, Kunder A. Detailed chemical abundance analysis of the thick disk star cluster Gaia 1 Astronomy and Astrophysics. 609. DOI: 10.1051/0004-6361/201731434  0.591
2017 Spencer ME, Mateo M, Walker MG, Olszewski EW, McConnachie AW, Kirby EN, Koch A. The Binary Fraction of Stars in Dwarf Galaxies: The Case of Leo II The Astronomical Journal. 153: 254. DOI: 10.3847/1538-3881/Aa6D51  0.509
2017 Koch A, Kunder A, Wojno J. Spectroscopic confirmation of the low-latitude object FSR 1716 as an old globular cluster Astronomy and Astrophysics. 605. DOI: 10.1051/0004-6361/201731771  0.546
2017 Koch A, Hansen CJ, Kunder A. Spectroscopic study of the elusive globular cluster ESO452-SC11 and its surroundings Astronomy and Astrophysics. 604. DOI: 10.1051/0004-6361/201730788  0.553
2017 Susmitha A, Koch A, Sivarani T. Abundance analysis of a CEMP-no star in the Carina dwarf spheroidal galaxy Astronomy and Astrophysics. 606. DOI: 10.1051/0004-6361/201730774  0.6
2017 Duffau S, Caffau E, Sbordone L, Bonifacio P, Andrievsky S, Korotin S, Babusiaux C, Salvadori S, Monaco L, François P, Skúladóttir Á, Bragaglia A, Donati P, Spina L, Gallagher AJ, ... ... Koch A, et al. The Gaia-ESO Survey: Galactic evolution of sulphur and zinc Astronomy and Astrophysics. 604. DOI: 10.1051/0004-6361/201730477  0.584
2017 Koch A, Cote P. Galactic Pal-eontology: abundance analysis of the disrupting globular cluster Palomar 5 Astronomy and Astrophysics. 601. DOI: 10.1051/0004-6361/201629872  0.552
2017 Hanke M, Koch A, Hansen CJ, McWilliam A. Insights into the chemical composition of the metal-poor Milky Way halo globular cluster NGC 6426 Astronomy and Astrophysics. 599. DOI: 10.1051/0004-6361/201629650  0.578
2017 Hansen CJ, Jofre P, Koch A, McWilliam A, Sneden CS. Something borrowed, something blue:the nature of blue metal-poor stars inferred from their colours and chemical abundances Astronomy and Astrophysics. 598. DOI: 10.1051/0004-6361/201629628  0.582
2017 Pancino E, Lardo C, Altavilla G, Marinoni S, Ragaini S, Cocozza G, Bellazzini M, Sabbi E, Zoccali M, Donati P, Heiter U, Koposov SE, Blomme R, Morel T, Simon-Diaz S, ... ... Koch A, et al. The gaia -ESO survey : Calibration strategy Astronomy and Astrophysics. 598. DOI: 10.1051/0004-6361/201629450  0.441
2017 Koch A, Black CS, Rich RM, Longstaff FA, Collins MLM, Janz J. Another look at the size of the low-surface brightness galaxy VCC 1661 in the Virgo Cluster Astronomische Nachrichten. 338: 503-509. DOI: 10.1002/Asna.201613274  0.55
2016 Kunder A, Rich RM, Koch A, Storm J, Nataf DM, De Propris R, Walker AR, Bono G, Johnson CI, Shen J, Li ZY. Before the Bar: Kinematic Detection of A Spheroidal Metal-Poor Bulge Componenent Astrophysical Journal Letters. 821. DOI: 10.3847/2041-8205/821/2/L25  0.564
2016 Martin NF, Ibata RA, Collins MLM, Rich RM, Bell EF, Ferguson AMN, Laevens BPM, Rix HW, Chapman SC, Koch A. TRIANGULUM II: A VERY METAL-POOR AND DYNAMICALLY HOT STELLAR SYSTEM Astrophysical Journal. 818. DOI: 10.3847/0004-637X/818/1/40  0.52
2016 Hollyhead K, Kacharov N, Lardo C, Bastian N, Hilker M, Rejkuba M, Koch A, Grebel EK, Georgiev I. Evidence for multiple populations in the intermediate-age cluster Lindsay 1 in the SMC Monthly Notices of the Royal Astronomical Society: Letters. 465: L39-L43. DOI: 10.1093/Mnrasl/Slw179  0.596
2016 Caffau E, Bonifacio P, Spite M, Spite F, Monaco L, Sbordone L, François P, Gallagher AJ, Plez B, Zaggia S, Ludwig HG, Cayrel R, Koch A, Steffen M, Salvadori S, et al. TOPoS - III. An ultra iron-poor multiple CEMP system Astronomy and Astrophysics. 595. DOI: 10.1051/0004-6361/201629776  0.397
2016 Hansen CJ, Rich RM, Koch A, Xu S, Kunder A, Ludwig HG. Chemical abundances in a high-velocity RR Lyrae star near the bulge Astronomy and Astrophysics. 590. DOI: 10.1051/0004-6361/201628279  0.595
2016 Koch A, McWilliam A, Preston GW, Thompson IB. Metal-poor stars towards the Galactic bulge: A population potpourri Astronomy and Astrophysics. 587. DOI: 10.1051/0004-6361/201527413  0.602
2016 Hendricks B, Boeche C, Johnson CI, Frank MJ, Koch A, Mateo M, Bailey JI. Evidence for a chemical enrichment coupling of globular clusters and field stars in the Fornax dSph Astronomy and Astrophysics. 585. DOI: 10.1051/0004-6361/201526996  0.596
2015 Ural U, Cescutti G, Koch A, Kleyna J, Feltzing S, Wilkinson MI. An inefficient dwarf: Chemical abundances and the evolution of the ursa minor dwarf spheroidal galaxy Monthly Notices of the Royal Astronomical Society. 449: 761-770. DOI: 10.1093/Mnras/Stv294  0.567
2015 Kunder A, Rich RM, Hawkins K, Poleski R, Storm J, Johnson CI, Shen J, Li ZY, Cordero MJ, Nataf DM, Bono G, Walker AR, Koch A, De Propris R, Udalski A, et al. A high-velocity bulge rr lyrae variable on a halo-like orbit Astrophysical Journal Letters. 808. DOI: 10.1088/2041-8205/808/1/L12  0.554
2015 Koch A, Frank MJ, Pasquali A, Rich RM, Rabitz A. MAJOR MERGERS with SMALL GALAXIES: The DISCOVERY of A MAGELLANIC-TYPE GALAXY at z = 0.12 Astrophysical Journal. 815. DOI: 10.1088/0004-637X/815/2/105  0.551
2015 Koch A, Danforth CW, Rich RM, Ibata R, Keeney BA. A DETECTION OF GAS ASSOCIATED WITH THE M31 STELLAR STREAM Astrophysical Journal. 807. DOI: 10.1088/0004-637X/807/2/153  0.547
2015 Hyde EA, Keller S, Zucker DB, Ibata R, Siebert A, Lewis GF, Penarrubia J, Irwin M, Gilmore G, Lane RR, Koch A, Conn AR, Diakogiannis FI, Martell S. Selecting Sagittarius: Identification and chemical characterization of the Sagittarius stream Astrophysical Journal. 805. DOI: 10.1088/0004-637X/805/2/189  0.509
2015 Frank MJ, Koch A, Feltzing S, Kacharov N, Wilkinson MI, Irwin M. Strömgren uvby photometry of the peculiar globular cluster NGC 2419 Astronomy and Astrophysics. 581. DOI: 10.1051/0004-6361/201526555  0.825
2015 San Roman I, Muñoz C, Geisler D, Villanova S, Kacharov N, Koch A, Carraro G, Tautvaišiene G, Vallenari A, Alfaro EJ, Bensby T, Flaccomio E, Francois P, Korn AJ, Pancino E, et al. The Gaia-ESO Survey: Detailed abundances in the metal-poor globular cluster NGC 4372 Astronomy and Astrophysics. 579. DOI: 10.1051/0004-6361/201525722  0.812
2015 Bonifacio P, Caffau E, Spite M, Limongi M, Chieffi A, Klessen RS, François P, Molaro P, Ludwig HG, Zaggia S, Spite F, Plez B, Cayrel R, Christlieb N, Clark PC, ... ... Koch A, et al. TOPoS: II. on the bimodality of carbon abundance in CEMP stars Implications on the early chemical evolution of galaxies Astronomy and Astrophysics. 579. DOI: 10.1051/0004-6361/201425266  0.534
2015 Kacharov N, Koch A, Caffau E, Sbordone L. Galactic evolution of sulphur as traced by globular clusters Astronomy and Astrophysics. 577. DOI: 10.1051/0004-6361/201425058  0.828
2015 Hansen CJ, Ludwig HG, Seifert W, Koch A, Xu W, Caffau E, Christlieb N, Korn AJ, Lind K, Sbordone L, Ruchti G, Feltzing S, de Jong RS, Barden S, Schnurr O. Stellar science from a blue wavelength range Astronomische Nachrichten. 336: 665-676. DOI: 10.1002/Asna.201512206  0.313
2014 Koch A, Rich RM. A chemical confirmation of the faint boötes II dwarf spheroidal galaxy Astrophysical Journal. 794. DOI: 10.1088/0004-637X/794/1/89  0.594
2014 Hendricks B, Koch A, Lanfranchi GA, Boeche C, Walker M, Johnson CI, Peñarrubia J, Gilmore G. The metal-poor knee in the fornax dwarf spheroidal galaxy Astrophysical Journal. 785. DOI: 10.1088/0004-637X/785/2/102  0.527
2014 Collins MLM, Chapman SC, Rich RM, Ibata RA, Martin NF, Irwin MJ, Bate NF, Lewis GF, Peñarrubia J, Arimoto N, Casey CM, Ferguson AMN, Koch A, McConnachie AW, Tanvir N. The masses of local group dwarf spheroidal galaxies: The death of the universal mass profile Astrophysical Journal. 783. DOI: 10.1088/0004-637X/783/1/7  0.426
2014 Johnson CI, Rich RM, Kobayashi C, Kunder A, Koch A. Light, alpha, and Fe-peak element abundances in the Galactic bulge Astronomical Journal. 148. DOI: 10.1088/0004-6256/148/4/67  0.513
2014 Hendricks B, Koch A, Walker M, Johnson CI, Peñarrubia J, Gilmore G. Insights from the outskirts: Chemical and dynamical properties in the outer parts of the Fornax dwarf spheroidal galaxy Astronomy and Astrophysics. 572. DOI: 10.1051/0004-6361/201424645  0.552
2014 Kacharov N, Bianchini P, Koch A, Frank MJ, Martin NF, Van De Ven G, Puzia TH, Mcdonald I, Johnson CI, Zijlstra AA. A study of rotating globular clusters: The case of the old, metal-poor globular cluster NGC 4372 * * * Astronomy and Astrophysics. 567. DOI: 10.1051/0004-6361/201423709  0.827
2014 Pasquini L, Koch A, Smiljanic R, Bonifacio P, Modigliani A. The Be-test in the Li-rich star #1657 of NGC 6397: Evidence for Li-flash in RGB stars? Astronomy and Astrophysics. 563. DOI: 10.1051/0004-6361/201323220  0.576
2014 Koch A, McWilliam A. The chemical composition of a regular halo globular cluster: NGC 5897 Astronomy and Astrophysics. 565. DOI: 10.1051/0004-6361/201323119  0.575
2013 Koch A, Hansen T, Feltzing S, Wilkinson MI. A spectroscopic binary in the Hercules dwarf spheroidal galaxy The Astrophysical Journal. 780: 91. DOI: 10.1088/0004-637X/780/1/91  0.566
2013 Collins MLM, Chapman SC, Rich RM, Ibata RA, Martin NF, Irwin MJ, Bate NF, Lewis GF, Peñarrubia J, Arimoto N, Casey CM, Ferguson AMN, Koch A, McConnachie AW, Tanvir N. A kinematic study of the andromeda dwarf spheroidal system Astrophysical Journal. 768. DOI: 10.1088/0004-637X/768/2/172  0.565
2013 Johnson CI, Rich RM, Kobayashi C, Kunder A, Pilachowski CA, Koch A, De Propris R. Metallicity distribution functions, radial velocities, and alpha element abundances in three off-axis bulge fields Astrophysical Journal. 765. DOI: 10.1088/0004-637X/765/2/157  0.496
2013 Caffau E, Bonifacio P, Sbordone L, François P, Monaco L, Spite M, Plez B, Cayrel R, Christlieb N, Clark P, Glover S, Klessen R, Koch A, Ludwig HG, Spite F, et al. TOPoS: I. Survey design and analysis of the first sample Astronomy and Astrophysics. 560. DOI: 10.1051/0004-6361/201322488  0.588
2013 Kacharov N, Koch A, McWilliam A. A comprehensive chemical abundance study of the outer halo globular cluster M 75 Astronomy and Astrophysics. 554. DOI: 10.1051/0004-6361/201321392  0.838
2013 Koch A, Feltzing S, Adén D, Matteucci F. Neutron-capture element deficiency of the Hercules dwarf spheroidal galaxy Astronomy and Astrophysics. 554: 5-14. DOI: 10.1051/0004-6361/201220742  0.586
2013 Lianou S, Grebel EK, Da Costa GS, Rejkuba M, Jerjen H, Koch A. Population gradients and photometric metallicities in early- and transition-type dwarf galaxies: Clues from the Sculptor group Astronomy & Astrophysics. 550: A7. DOI: 10.1051/0004-6361/201219959  0.647
2013 Caffau E, Koch A, Sbordone L, Sartoretti P, Hansen CJ, Royer F, Leclerc N, Bonifacio P, Christlieb N, Ludwig HG, Grebel EK, de Jong RS, Chiappini C, Walcher J, Mignot S, et al. Velocity and abundance precisions for future high-resolution spectroscopic surveys: A study for 4MOST Astronomische Nachrichten. 334: 197-216. DOI: 10.1002/Asna.201211814  0.543
2012 Rich RM, Collins ML, Black CM, Longstaff FA, Koch A, Benson A, Reitzel DB. A tidally distorted dwarf galaxy near NGC 4449. Nature. 482: 192-4. PMID 22318602 DOI: 10.1038/Nature10837  0.54
2012 De Jong RS, Bellido-Tirado O, Chiappini C, Depagne E, Haynes R, Johl D, Schnurr O, Schwope A, Walcher J, Dionies F, Haynes D, Kelz A, Kitaura FS, Lamer G, Minchev I, ... ... Koch A, et al. 4MOST - 4-metre multi-object spectroscopic telescope Proceedings of Spie - the International Society For Optical Engineering. 8446. DOI: 10.1117/12.2055826  0.523
2012 Salucci P, Wilkinson MI, Walker MG, Gilmore GF, Grebel EK, Koch A, Martins CF, Wyse RFG. Dwarf spheroidal galaxy kinematics and spiral galaxy scaling laws Monthly Notices of the Royal Astronomical Society. 420: 2034-2041. DOI: 10.1111/J.1365-2966.2011.20144.X  0.624
2012 Koch A, Burkert A, Rich RM, Collins MLM, Black CS, Hilker M, Benson AJ. Threshing in Action: The Tidal Disruption of a Dwarf Galaxy by the Hydra I Cluster The Astrophysical Journal. 755: 1-7. DOI: 10.1088/2041-8205/755/1/L13  0.492
2012 Haschke R, Grebel EK, Frebel A, Duffau S, Hansen CJ, Koch A. Chemical abundances of metal-poor rrlyrae stars in the magellanic clouds Astronomical Journal. 144. DOI: 10.1088/0004-6256/144/3/88  0.699
2012 Kunder A, Koch A, Michael Rich R, De Propris R, Howard CD, Stubbs SA, Johnson CI, Shen J, Wang Y, Robin AC, Kormendy J, Soto M, Frinchaboy P, Reitzel DB, Zhao H, et al. The bulge radial velocity assay (BRAVA). II. Complete sample and data release Astronomical Journal. 143. DOI: 10.1088/0004-6256/143/3/57  0.412
2012 Kacharov N, Koch A. Precise abundance analysis of the outer halo globular cluster M 75 Arxiv: Astrophysics of Galaxies. 1480: 385-387. DOI: 10.1063/1.4754395  0.838
2012 Koch A, Matteucci F, Feltzing S. Small-scale hero: Massive-star enrichment in the Hercules dwarf spheroidal Arxiv: Astrophysics of Galaxies. 1480: 190-193. DOI: 10.1063/1.4754353  0.539
2011 Collins MLM, Chapman SC, Ibata RA, Irwin MJ, Rich RM, Ferguson AMN, Lewis GF, Tanvir N, Koch A. The kinematic identification of a thick stellar disc in M31 Monthly Notices of the Royal Astronomical Society. 413: 1548-1568. DOI: 10.1111/J.1365-2966.2011.18238.X  0.356
2011 Koch A, Lind K, Rich RM. Discovery of a super-Li-rich turnoff star in the metal-poor globular cluster NGC 6397 The Astrophysical Journal. 738: 1-5. DOI: 10.1088/2041-8205/738/2/L29  0.61
2011 De Propris R, Rich RM, Kunder A, Johnson CI, Koch A, Brough S, Conselice CJ, Gunawardhana M, Palamara D, Pimbblet K, Wijesinghe D. Separating the conjoined red clump in the galactic bulge: Kinematics and abundances Astrophysical Journal Letters. 732. DOI: 10.1088/2041-8205/732/2/L36  0.575
2011 Lépine S, Koch A, Rich RM, Kuijken K. A first measurement of the proper motion of the Leo II dwarf spheroidal galaxy Astrophysical Journal. 741. DOI: 10.1088/0004-637X/741/2/100  0.37
2011 Koch A, McWilliam A. A Differential Chemical Element Analysis Of The Metal-Poor Globular Cluster Ngc 6397* The Astronomical Journal. 142: 63. DOI: 10.1088/0004-6256/142/2/63  0.582
2011 Lianou S, Grebel E, Koch A. M 81 Group dSphs: Metallicity Distribution Functions and Gradients Eas Publications Series. 48: 91-92. DOI: 10.1051/Eas/1148022  0.592
2011 Crnojević D, Grebel E, Cole A, Koch A, Rejkuba M, Da Costa G, Jerjen H. Dwarf Galaxies Beyond Our Doorstep: the Centaurus Group Eas Publications Series. 48: 51-57. DOI: 10.1051/Eas/1148008  0.672
2011 Koch A, Caffau E. Sulphur in the metal poor globular cluster NGC 6397 Astronomy and Astrophysics. 534. DOI: 10.1051/0004-6361/201117678  0.569
2011 Lianou S, Grebel EK, Koch A. Spectroscopic versus photometric metallicities: Milky Way dwarf spheroidal companions as a test case Astronomy & Astrophysics. 531: A152. DOI: 10.1051/0004-6361/201116998  0.621
2011 Adén D, Eriksson K, Feltzing S, Grebel EK, Koch A, Wilkinson MI. An abundance study of red-giant-branch stars in the Hercules dwarf spheroidal galaxy Astronomy and Astrophysics. 525. DOI: 10.1051/0004-6361/201014963  0.702
2010 Ural U, Wilkinson MI, Koch A, Gilmore G, Beers TC, Belokurov V, Evans NW, Grebel EK, Vidrih S, Zucker DB. Kinematic subpopulations in dwarf spheroidal galaxies Monthly Notices of the Royal Astronomical Society. 402: 1357-1368. DOI: 10.1111/J.1365-2966.2009.15975.X  0.615
2010 Koch A, McWilliam A. A differential chemical abundance scale for the globular cluster M5 The Astronomical Journal. 139: 2289-2299. DOI: 10.1088/0004-6256/139/6/2289  0.532
2010 Koch A, Rich RM. A statistical analysis of the late-type stellar content in the andromeda halo Astronomical Journal. 139: 2279-2288. DOI: 10.1088/0004-6256/139/6/2279  0.513
2010 Glatt K, Grebel EK, Koch A. Ages and luminosities of young SMC/LMC star clusters and the recent star formation history of the Clouds Astronomy and Astrophysics. 517: A50. DOI: 10.1051/0004-6361/201014187  0.66
2010 Koch A, Cote P. Chemical abundances for the outer halo cluster Pal 4 from co-added high-resolution spectroscopy Astronomy and Astrophysics. 517. DOI: 10.1051/0004-6361/201014155  0.595
2010 Crnojević D, Grebel EK, Koch A. A close look at the Centaurus A group of galaxies Astronomy and Astrophysics. 516: A85. DOI: 10.1051/0004-6361/200913429  0.693
2010 Lianou S, Grebel EK, Koch A. Dwarf spheroidals in the M 81 group – Metallicity distribution functions and population gradients Astronomy and Astrophysics. 521: A43. DOI: 10.1051/0004-6361/200913364  0.639
2009 Quinn DP, Wilkinson MI, Irwin MJ, Marshall J, Koch A, Belokurov V. On the reported death of the MACHO era Monthly Notices of the Royal Astronomical Society: Letters. 396: L11-L15. DOI: 10.1111/J.1745-3933.2009.00652.X  0.381
2009 Donato F, Gentile G, Salucci P, Martins CF, Wilkinson MI, Gilmore G, Grebel EK, Koch A, Wyse R. A constant dark matter halo surface density in galaxies Monthly Notices of the Royal Astronomical Society. 397: 1169-1176. DOI: 10.1111/J.1365-2966.2009.15004.X  0.584
2009 Adén D, Wilkinson MI, Read JI, Feltzing S, Koch A, Gilmore GF, Grebel EK, Lundström I. A NEW LOW MASS FOR THE HERCULES dSph: THE END OF A COMMON MASS SCALE FOR THE DWARFS? The Astrophysical Journal. 706: L150-L154. DOI: 10.1088/0004-637X/706/1/L150  0.593
2009 Howard CD, Rich RM, Clarkson W, Mallery R, Kormendy J, De Propris R, Robin AC, Fux R, Reitzel DB, Zhao H, Kuijken K, Koch A. Kinematics at the edge of the galactic bulge: Evidence for cylindrical rotation Astrophysical Journal. 702: L153-L157. DOI: 10.1088/0004-637X/702/2/L153  0.466
2009 Koch A, Wilkinson MI, Kleyna JT, Irwin M, Zucker DB, Belokurov V, Gilmore GF, Fellhauer M, Evans NW. A spectroscopic confirmation of the bootes II dwarf spheroidal Astrophysical Journal. 690: 453-462. DOI: 10.1088/0004-637X/690/1/453  0.549
2009 Glatt K, Grebel EK, Gallagher JS, Nota A, Sabbi E, Sirianni M, Clementini G, Da Costa G, Tosi M, Harbeck D, Koch A, Kayser A. Structural parameters of seven small magellanic cloud intermediate-age and old star clusters Astronomical Journal. 138: 1403-1416. DOI: 10.1088/0004-6256/138/5/1403  0.646
2009 Koch A, Côté P, McWilliam A. All quiet in the outer halo:chemical abundances in the globular cluster Pal 3 Astronomy and Astrophysics. 506: 729-743. DOI: 10.1051/0004-6361/200912819  0.598
2009 Adén D, Feltzing S, Koch A, Wilkinson MI, Grebel EK, Lundström I, Gilmore GF, Zucker DB, Belokurov V, Evans NW, Faria D. A photometric and spectroscopic study of the new dwarf spheroidal galaxy in Hercules Astronomy and Astrophysics. 506: 1147-1168. DOI: 10.1051/0004-6361/200912718  0.69
2009 Crnojević D, Grebel E, Koch A. Evolution of dwarf galaxies in the Centaurus A group Astronomische Nachrichten. 330: 1001-1003. DOI: 10.1002/Asna.200911280  0.652
2009 Lianou S, Grebel E, Koch A. Dwarf spheroidal galaxies in the M81 group of galaxies Astronomische Nachrichten. 330: 995-997. DOI: 10.1002/Asna.200911277  0.665
2009 Koch A. Complexity in small-scale dwarf spheroidal galaxies – Ludwig Biermann Award Lecture 2008 Astronomische Nachrichten. 330: 675-690. DOI: 10.1002/Asna.200911231  0.54
2008 Chapman SC, Ibata R, Irwin M, Koch A, Letarte B, Martin N, Collins M, Lewis GF, McConnachie A, Peñarrubia J, Rich RM, Trethewey D, Ferguson A, Huxor A, Tanvir N. The kinematic footprints of five stellar streams in Andromeda's halo Monthly Notices of the Royal Astronomical Society. 390: 1437-1452. DOI: 10.1111/J.1365-2966.2008.13703.X  0.425
2008 Glatt K, Grebel EK, Sabbi E, Gallagher JS, Nota A, Sirianni M, Clementini G, Tosi M, Harbeck D, Koch A, Kayser A, Da Costa G. Age determination of six intermediate-age small magellanic cloud star clusters with HST/ACS Astronomical Journal. 136: 1703-1727. DOI: 10.1088/0004-6256/136/4/1703  0.648
2008 Koch A, McWilliam A. Erratum: “A New Abundance Scale For The Globular Cluster 47 Tuc” (2008, Aj, 135, 1551) The Astronomical Journal. 136: 518-518. DOI: 10.1088/0004-6256/136/1/518  0.349
2008 Koch A, Grebel EK, Gilmore GF, Wyse RFG, Kleyna JT, Harbeck DR, Wilkinson MI, Evans NW. Complexity on small scales. III. Iron and α element abundances in the Carina dwarf spheroidal galaxy Astronomical Journal. 135: 1580-1597. DOI: 10.1088/0004-6256/135/4/1580  0.688
2008 Koch A, McWilliam A. A New Abundance Scale for the Globular Cluster 47 Tuc The Astronomical Journal. 135: 1551-1566. DOI: 10.1088/0004-6256/135/4/1551  0.542
2008 Glatt K, Gallagher JS, Grebel EK, Nota A, Sabbi E, Sirianni M, Clementini G, Tosi M, Harbeck D, Koch A, Cracraft M. AN ACCURATE AGE DETERMINATION FOR THE SMALL MAGELLANIC CLOUD STAR CLUSTER NGC 121 WITH THEHUBBLE SPACE TELESCOPE/ADVANCED CAMERA FOR SURVEYS The Astronomical Journal. 135: 1106-1116. DOI: 10.1088/0004-6256/135/4/1106  0.641
2008 Koch A, McWilliam A, Grebel EK, Zucker DB, Belokurov V. The Highly Unusual Chemical Composition of the Hercules Dwarf Spheroidal Galaxy The Astrophysical Journal. 688. DOI: 10.1086/595001  0.69
2008 Brown TM, Beaton R, Chiba M, Ferguson HC, Gilbert KM, Guhathakurta P, Iye M, Kalirai JS, Koch A, Komiyama Y, Majewski SR, Reitzel DB, Renzini A, Rich RM, Smith E, et al. The extended star formation history of the Andromeda spheroid at 35 kpc on the minor axis Astrophysical Journal. 685. DOI: 10.1086/592686  0.568
2008 Koch A, Rich RM, Reitzel DB, Martin NF, Ibata RA, Chapman SC, Majewski SR, Mori M, Loh YS, Ostheimer JC, Tanaka M. Kinematic and chemical constraints on the formation of m31's inner and outer halo Astrophysical Journal. 689: 958-982. DOI: 10.1086/592373  0.505
2008 Howard CD, Rich RM, Reitzel DB, Koch A, De Propris R, Zhao H. The Bulge Radial Velocity Assay (BRAVA). I. Sample selection and a rotation curve Astrophysical Journal. 688: 1060-1077. DOI: 10.1086/592106  0.446
2007 Coleman MG, Jordi K, Rix HW, Grebel EK, Koch A. A wide-field view of leo II: A structural analysis using the sloan digital sky survey Astronomical Journal. 134: 1938-1951. DOI: 10.1086/522229  0.57
2007 Koch A, Kleyna JT, Wilkinson MI, Grebel EK, Gilmore GF, Evans NW, Wyse RFG, Harbeck DR. Stellar kinematics in the remote Leo II dwarf spheroidal galaxy -- Another brick in the wall The Astronomical Journal. 134: 566-578. DOI: 10.1086/519380  0.645
2007 Gilmore G, Wilkinson MI, Wyse RFG, Kleyna JT, Koch A, Evans NW, Grebel EK. The observed properties of dark matter on small spatial scales Astrophysical Journal. 663: 948-959. DOI: 10.1086/518025  0.637
2007 Koch A. Chemical and Kinematical Evolution in Nearby Dwarf Spheroidal Galaxies Publications of the Astronomical Society of the Pacific. 119: 347-348. DOI: 10.1086/512865  0.605
2007 Koch A, Wilkinson MI, Kleyna J, Gilmore G, Grebel EK, Mackey AD, Evans NW, Wyse RFG. Stellar kinematics and metallicities in the Leo I dwarf spheroidal galaxy -- wide field implications for galactic evolution The Astrophysical Journal. 657: 241-261. DOI: 10.1086/510879  0.668
2007 Koch A, Grebel EK, Kleyna JT, Wilkinson MI, Harbeck DR, Gilmore GF, Wyse RFG, Evans NW. Complexity on Small Scales. II. Metallicities and Ages in the Leo II Dwarf Spheroidal Galaxy The Astronomical Journal. 133: 270-283. DOI: 10.1086/509889  0.638
2007 Gilmore G, Wilkinson M, Kleyna J, Koch A, Evans NW, Wyse RFG, Grebel EK. Observed Properties of Dark Matter: dynamical studies of dSph galaxies Arxiv: Astrophysics. 173: 15-18. DOI: 10.1016/J.Nuclphysbps.2007.08.143  0.605
2007 Kissel J, Altwegg K, Clark BC, Colangeli L, Cottin H, Czempiel S, Eibl J, Engrand C, Fehringer HM, Feuerbacher B, Fomenkova M, Glasmachers A, Greenberg JM, Grün E, Haerendel G, ... ... Koch A, et al. Cosima – High Resolution Time-of-Flight Secondary Ion Mass Spectrometer for the Analysis of Cometary Dust Particles onboard Rosetta Space Science Reviews. 128: 823-867. DOI: 10.1007/S11214-006-9083-0  0.305
2006 Koch A, Grebel EK. Erratum: "The Anisotropic Distribution of M31 Satellite Galaxies: A Polar Great Plane of Early-Type Companions" ([URL ADDRESS="/cgi-bin/resolve?2006AJ....131.1405K" STATUS="OKAY"]AJ, 131, 1405 [2006][/URL]) The Astronomical Journal. 132: 1725. DOI: 10.1086/507790  0.562
2006 Wyse RFG, Gilmore G, Norris JE, Wilkinson MI, Kleyna JT, Koch A, Evans NW, Grebel EK. Further evidence of a merger origin for the thick disk: Galactic stars along lines of sight to dwarf spheroidal galaxies Astrophysical Journal. 639: L13-L16. DOI: 10.1086/501228  0.649
2006 Koch A, Grebel EK. The Anisotropic Distribution of M31 Satellite Galaxies: A Polar Great Plane of Early-type Companions The Astronomical Journal. 131: 1405-1415. DOI: 10.1086/499534  0.576
2006 Koch A, Grebel EK, Wyse RFG, Kleyna JT, Wilkinson MI, Harbeck DR, Gilmore GF, Evans NW. Complexity On Small Scales: The Metallicity Distribution Of The Carina Dwarf Spheroidal Galaxy The Astronomical Journal. 131: 895-911. DOI: 10.1086/499490  0.65
2006 Wilkinson M, Kleyna J, Wyn Evans N, Gilmore G, Read J, Koch A, Grebel E, Irwin M. The internal kinematics of dwarf spheroidal galaxies Eas Publications Series. 20: 105-112. DOI: 10.1051/Eas:2006055  0.613
2005 Harbeck D, Gallagher JS, Grebel EK, Koch A, Zucker DB. Andromeda IX: Properties of the faintest M31 dwarf satellite galaxy Astrophysical Journal. 623: 159-163. DOI: 10.1086/428650  0.68
2004 Koch A, Grebel EK, Odenkirchen M, Martínez-Delgado D, Caldwell JAR. Mass Segregation in the Globular Cluster Palomar 5 and its Tidal Tails The Astronomical Journal. 128: 2274-2287. DOI: 10.1086/425046  0.636
2004 Koch A, Odenkirchen M, Grebel E, Caldwell J. A calibration map for Wide Field Imager photometry Astronomische Nachrichten. 325: 299-306. DOI: 10.1002/Asna.200310176  0.482
2002 Koch A, Edvardsson B. Europium abundances in F and G disk dwarfs Astronomy and Astrophysics. 381: 500-506. DOI: 10.1051/0004-6361:20011578  0.395
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