Ramanath Cowsik - Publications

Affiliations: 
Physics Washington University, Saint Louis, St. Louis, MO 
Area:
Astrophysics
Website:
http://physics.wustl.edu/people/cowsik_ram

70 high-probability publications. We are testing a new system for linking publications to authors. You can help! If you notice any innacuracies, 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
2016 Kislat F, Beilicke M, Zajczyk A, Guo Q, Endsley R, Cowsik R, Dowkontt P, Barthelmy S, Hams T, Okajima T, Sasaki M, De Geronimo G, Haba Y, Saji S, Krawczynski H. The X-ray scattering polarimeter X-Calibur 2014 Ieee Nuclear Science Symposium and Medical Imaging Conference, Nss/Mic 2014. DOI: 10.1109/NSSMIC.2014.7431206  1
2016 Phillips DG, Snow WM, Babu K, Banerjee S, Baxter DV, Berezhiani Z, Bergevin M, Bhattacharya S, Brooijmans G, Castellanos L, Chen MC, Coppola CE, Cowsik R, Crabtree JA, Das P, et al. Neutron-antineutron oscillations: Theoretical status and experimental prospects Physics Reports. 612: 1-45. DOI: 10.1016/j.physrep.2015.11.001  1
2015 Beilicke M, Kislat F, Zajczyk A, Guo Q, Endsley R, Cowsik R, Dowkontt P, Krawczynski H, Barthelmy S, Hams T, Okajima T, Sasaki M, De Geronimo G, Haba Y, Saji S. First flight of the X-ray polarimeter X-Calibur Ieee Aerospace Conference Proceedings. 2015. DOI: 10.1109/AERO.2015.7118915  1
2014 Cowsik R, Burch B, Madziwa-Nussinov T. The origin of the spectral intensities of cosmic-ray positrons Astrophysical Journal. 786. DOI: 10.1088/0004-637X/786/2/124  1
2014 Cowsik R. Cosmological considerations relevant to the origin of consciousness Interdisciplinary Perspectives On Consciousness and the Self. 253-261. DOI: 10.1007/978-81-322-1587-5__19  1
2013 Burch B, Cowsik R. Properties of Galactic dark matter: Constraints from astronomical observations Astrophysical Journal. 779. DOI: 10.1088/0004-637X/779/1/35  1
2013 Subrahmanyan R, Cowsik R. Is there an unaccounted for excess in the extragalactic cosmic radio background? Astrophysical Journal. 776. DOI: 10.1088/0004-637X/776/1/42  1
2013 Gothe KS, Prabhu TP, Vishwanath PR, Acharya BS, Srinivasan R, Chitnis VR, Kamath PU, Srinivasulu G, Saleem F, Kemkar PMM, Mahesh PK, Gabriel F, Manoharan J, Dorji N, Dorjai T, ... ... Cowsik R, et al. Pointing of HAGAR telescope mirrors Experimental Astronomy. 35: 489-506. DOI: 10.1007/s10686-012-9319-9  0.64
2012 Madziwa-Nussinov T, Wagoner K, Shore P, Hutt CR, Evans JR, Krishnan N, Cowsik R. Characteristics and response of a rotational seismometer to seismic signals Bulletin of the Seismological Society of America. 102: 563-573. DOI: 10.1785/0120110166  1
2012 Cowsik R, Madziwa-Nussinov T, Nussinov S, Sarkar U. Testing violations of Lorentz invariance with cosmic rays Physical Review D - Particles, Fields, Gravitation and Cosmology. 86. DOI: 10.1103/PhysRevD.86.045024  1
2012 Markle CD, Cowsik R. General approach to Casimir force problems based on local reflection amplitudes and Huygens' principle Physical Review a - Atomic, Molecular, and Optical Physics. 85. DOI: 10.1103/PhysRevA.85.052516  1
2011 Cowsik R, Nussinov S, Sarkar U. Superluminal neutrinos at OPERA confront pion decay kinematics. Physical Review Letters. 107: 251801. PMID 22243066 DOI: 10.1103/PhysRevLett.107.251801  1
2011 Britto RJ, Acharya BS, Anupama GC, Bhattacharjee P, Chitnis VR, Cowsik R, Dorji N, Duhan SK, Gothe KS, Kamath PU, Mahesh PK, Manoharan J, Nagesh BK, Parmar NK, Prabhu TP, et al. Data analysis method for the search of point sources of gamma rays with the HAGAR telescope array Proceedings of the 32nd International Cosmic Ray Conference, Icrc 2011. 9: 142-145. DOI: 10.7529/ICRC2011/V09/0943  0.64
2011 Britto RJ, Acharya BS, Anupama GC, Bhatt N, Bhattacharjee P, Bhattacharya S, Chitnis VR, Cowsik R, Dorji N, Duhan SK, Gothe KS, Kamath PU, Koul R, Manoharan J, Mahesh PK, et al. Observations with the High Altitude GAmma-Ray (HAGAR) telescope array in the Indian Himalayas Astrophysics and Space Sciences Transactions. 7: 501-505. DOI: 10.5194/astra-7-501-2011  0.64
2010 Cowsik R, Burch B. Positron fraction in cosmic rays and models of cosmic-ray propagation Physical Review D - Particles, Fields, Gravitation and Cosmology. 82. DOI: 10.1103/PhysRevD.82.023009  1
2010 Chaudhury S, Bhattacharjee P, Cowsik R. Direct detection of WIMPs: Implications of a self-consistent truncated isothermal model of the Milky Way's dark matter halo Journal of Cosmology and Astroparticle Physics. 2010. DOI: 10.1088/1475-7516/2010/09/020  1
2009 Cowsik R, Madziwa-Nussinov T, Wagoner K, Wiens D, Wysession M. Performance characteristics of a rotational seismometer for near-field and engineering applications Bulletin of the Seismological Society of America. 99: 1181-1189. DOI: 10.1785/0120080207  1
2009 Cowsik R, Wagoner K, Berti E, Sircar A. Internal dynamics and dynamical friction effects in the dwarf spheroidal galaxy in fornax Astrophysical Journal. 699: 1389-1394. DOI: 10.1088/0004-637X/699/2/1389  1
2009 Chitnis VR, Acharya BS, Britto RJ, Cowsik R, Dorji N, Duhan SK, Gothe KS, Kamath PU, Mahesh MK, Nagesh BK, Naidu A, Parmar NK, Prabhu TP, Saha L, Saleem F, et al. Observations of Blazars Mkn421 and 1ES 2344+514 using the PACT and HAGAR telescope systems 31st International Cosmic Ray Conference, Icrc 2009 0.64
2008 Rajalakshmi GI, Suresh D, Cowsik R, Unnikrishnan CS. Measurement of the casimir force in the range above 5 microns and detection of the finite temperature effect 11th Marcel Grossmann Meeting On Recent Developments in Theoretical and Experimental General Relativity, Gravitation and Relativistic Field Theories - Proc. of the Mg11 Meeting On General Relativity. 2758-2760.  1
2007 Cowsik R. An instrument for direct observations of seismic and normal-mode rotational oscillations of the Earth. Proceedings of the National Academy of Sciences of the United States of America. 104: 6893-8. PMID 17438268 DOI: 10.1073/pnas.0700904104  1
2007 Cowsik R, Srinivasan R, Kasturirengan S, Kumar AS, Wagoner K. Design and performance of a sub-nanoradian resolution autocollimating optical lever. The Review of Scientific Instruments. 78: 035105. PMID 17411215 DOI: 10.1063/1.2714044  1
2007 Cowsik R, Ratnam C, Bhattacharjee P, Majumdar S. Dynamics of dwarf-spheroidals and the dark matter halo of the galaxy New Astronomy. 12: 507-521. DOI: 10.1016/j.newast.2007.03.003  1
2007 Acharya BS, Chitnis VR, Cowsik R, Koul R, Kaul RK, Mitra AK, Prabhu TP, Rannot RC, Srinivasan R, Vishwanath PR. The status of high-altitude Himalayan Gamma Ray Observatory at Hanle Proceedings of the 30th International Cosmic Ray Conference, Icrc 2007. 3: 1361-1364.  0.64
2005 Bernatowicz TJ, Akande OW, Croat TK, Cowsik R. Constraints on grain formation around carbon stars from laboratory studies of presolar graphite Astrophysical Journal. 631: 988-1000. DOI: 10.1086/432599  1
2005 Koul R, Kaul RK, Mitra AK, Rannot RC, Acharya BS, Chitnis VR, Cowsik R, Prabhu TP, Srinivasan R, Srivatsan R, Vishwanath PR. The Himalayan γ- Ray observatory at hanle 29th International Cosmic Ray Conference, Icrc 2005. 5: 243-246.  0.64
2005 Chitnis VR, Acharya BS, Bhat PN, Cowsik R, Prabhu TP, Srinivasan R, Srivatsan R, Vishwanath PR. Status of HAGAR, the high altitude gamma ray observatory at hanle 29th International Cosmic Ray Conference, Icrc 2005. 5: 235-238.  0.64
1999 Cowsik R, Singh J, Saxena AK, Srinivasan R, Raveendran AV. Short-period intensity oscillations in the solar corona observed during the total solar eclipse of 26 February 1998 Solar Physics. 188: 89-98.  1
1998 Cowsik R. What's old and what's new about neutrinos Current Science. 75: 558-563.  1
1997 Singh J, Cowsik R, Raveendran AV, Bagare SP, Saxena AK, Sundararaman K, Krishan V, Naidu N, Samson JPA, Gabriel F. Detection of short-period coronal oscillations during the total solar eclipse of 24 October, 1995 Solar Physics. 170: 235-252.  1
1997 Nittler LR, Cowsik R. Galactic age estimates from O-rich stardust in meteorites Physical Review Letters. 78: 175-178.  1
1996 Bernatowicz TJ, Cowsik R, Gibbons PC, Lodders K, Fegley B, Amari S, Lewis RS. Constraints on stellar grain formation from presolar graphite in the murchison meteorite Astrophysical Journal. 472: 760-782. DOI: 10.1086/178105  1
1995 Cowsik R, Friedlander MW. The implications of gamma-ray lines observed from the orion complex Astrophysical Journal. 444: L29-L32.  1
1993 Bernatowicz T, Brannon J, Brazzle R, Cowsik R, Hohenberg C, Podosek F. Precise determination of relative and absolute ββ-decay rates of Te128 and Te130 Physical Review C. 47: 806-825. DOI: 10.1103/PhysRevC.47.806  1
1992 Bernatowicz T, Brannon J, Brazzle R, Cowsik R, Hohenberg C, Podosek F. Neutrino mass limits from a precise determination of beta beta -decay rates of 128Te and 130Te. Physical Review Letters. 69: 2341-2344. PMID 10046460 DOI: 10.1103/PhysRevLett.69.2341  1
1990 Cowsik R, Krishnan N, Tandon SN, Unnikrishnan S. Strength of intermediate-range forces coupling to isospin. Physical Review Letters. 64: 336-339. PMID 10041954 DOI: 10.1103/PhysRevLett.64.336  1
1990 Cowsik R. Geophysical searches for new forces in nature From Mantle to Meteorites: a Garland of Perspectives. 1-27.  1
1989 Cowsik R. Characteristics of plerions powered by pulsars Advances in Space Research. 9: 87-90. DOI: 10.1016/0273-1177(89)90313-X  1
1989 Cowsik R, Krishnan N, Saraswat P, Tandon SN, Unnikrishnan CS. Limits on the strength of the fifth force Advances in Space Research. 9: 123-132. DOI: 10.1016/0273-1177(89)90017-3  1
1989 Cowsik R, Krishnan N, Unnikrishnan S, Tandon SN, Saraswat P. A satellite-borne experiment to study the fifth force Pramana. 32: L303-L306. DOI: 10.1007/BF02879023  1
1988 Cowsik R, Krishnan N, Tandon SN, Unnikrishnan CS. Limit on the strength of intermediate-range forces coupling to isospin. Physical Review Letters. 61: 2179-2181. PMID 10039008 DOI: 10.1103/PhysRevLett.61.2179  1
1988 Cowsik R. Neutrino masses and flavors emitted in the supernova SN1987A. Physical Review D: Particles and Fields. 37: 1685-1687. PMID 9958854 DOI: 10.1103/PhysRevD.37.1685  1
1986 Biswas S, Chakraborty R, Cowsik R, Durgaprasad N, Kajarekar PJ, Singh RK, Vahia MN, Yadav JS, Goswami JN, Lal D, Mazumdar HS, Subhedar DV, Padmanabhan MK. Indian cosmic ray experiment ions (Anuradha) in space shuttle spacelab-3 using CR-39 detectors International Journal of Radiation Applications and Instrumentation. Part. 12: 411-413. DOI: 10.1016/1359-0189(86)90621-7  1
1986 Biswas S, Chakraborti R, Cowsik R, Durgaprasad N, Kajarekar PJ, Singh RK, Vahia MN, Yadav JS, Dutt N, Goswami JN, Lal D, Mazumdar HS, Subhedar DV, Padmanabhan MK. Ionization states of cosmic rays:Anuradha (IONS) experiment in Spacelab-3 Pramana. 27: 89-104. DOI: 10.1007/BF02846331  1
1986 Cowsik R, Vasanthi M. Dark matter-systematics of its distribution Journal of Astrophysics and Astronomy. 7: 29-38. DOI: 10.1007/BF02715024  1
1986 Cowsik R, Ghosh P. Towards a physical model for galactic rotation curves Journal of Astrophysics and Astronomy. 7: 17-28. DOI: 10.1007/BF02715023  1
1986 Cowsik R, Ghosh P. Dynamical effects of an extended cloud of dark matter on dwarf spheroidals Journal of Astrophysics and Astronomy. 7: 7-15. DOI: 10.1007/BF02715022  1
1986 Cowsik R. The neutrino hypothesis for dark matter in dwarf spheroidals Journal of Astrophysics and Astronomy. 7: 1-6. DOI: 10.1007/BF02715021  1
1985 Cowsik R. Constriction of cosmological bounds on neutrino masses by flavor mixing decays Physics Letters B. 151: 62-64. DOI: 10.1016/0370-2693(85)90823-8  1
1983 Cowsik R, Ghosh P, Melvin MA. Oblateness effects on the spindown of fast pulsars Nature. 303: 308-310. DOI: 10.1038/303308a0  1
1981 Cowsik R, Nussinov S. Some constraints on ΔB = 2 n-n oscillations Physics Letters B. 101: 237-240. DOI: 10.1016/0370-2693(81)90302-6  1
1980 Cowsik R, Narasimhan VS. Lower limit on the lifetime of nucleons Physical Review D. 22: 2204-2207. DOI: 10.1103/PhysRevD.22.2204  1
1979 Cowsik R. Radiative stability of neutrinos of finite rest mass Physical Review D. 19: 2219-2220. DOI: 10.1103/PhysRevD.19.2219  1
1977 Cowsik R. Limits on the radiative decay of neutrinos Physical Review Letters. 39: 784-787. DOI: 10.1103/PhysRevLett.39.784  1
1975 Cowsik R. GEOMETRY OF INVERSE COMPTON GAMMA RAY SOURCES . 715-720.  1
1973 Cowsik RK, Srinivasan R. ESR study of exchange coupled pairs in copper diethyldithiocarbamate Pramana. 1: 177-187. DOI: 10.1007/BF02847189  0.64
1972 Cowsik R, McClelland J. An upper limit on the neutrino rest mass Physical Review Letters. 29: 669-670. DOI: 10.1103/PhysRevLett.29.669  1
1972 Cowsik RK, Srinivasan R. ESR investigation of copper(II) bis-diethyldithiophosphate in single crystals Chemical Physics Letters. 16: 183-186. DOI: 10.1016/0009-2614(72)80487-1  0.64
1971 Price PB, Hutcheon I, Cowsik R, Barber DJ. Enhanced emission of iron nuclei in solar flares Physical Review Letters. 26: 916-919. DOI: 10.1103/PhysRevLett.26.916  1
1971 Cowsik R, Price PB. Origins of cosmic rays Physics Today. 24: 30-38. DOI: 10.1063/1.3022382  1
1971 Cowsik RK, Rangarajan G, Srinivasan R. ESR study of coupled pairs of molecules in copper diethyldithiocarbamate Chemical Physics Letters. 8: 136-138. DOI: 10.1016/0009-2614(71)80597-3  0.64
1970 Lund N, Peters B, Cowsik R, Pal Y. On the isotopic composition of primary cosmic ray nuclei Physics Letters B. 31: 553-556. DOI: 10.1016/0370-2693(70)90088-2  1
1970 Cowsik R, Pal Y, Rengarajan TN. A search for a consistent model for the electromagnetic spectrum of the Crab nebula Astrophysics and Space Science. 6: 390-395. DOI: 10.1007/BF00653857  1
1969 Cowsik R, Pal Y. Galactic X Rays and Gamma Rays Physical Review Letters. 23: 1467-1468. DOI: 10.1103/PhysRevLett.23.1467  1
1969 Cowsik R, Pal Y. Possible origin of high-energy cosmic gamma rays? Physical Review Letters. 22: 550-551. DOI: 10.1103/PhysRevLett.22.550  1
1967 Cowsik R, Pal Y, Tandon SN, Verma RP. Steady state of cosmic-ray nuclei their spectral shape and path length at low energies Physical Review. 158: 1238-1242. DOI: 10.1103/PhysRev.158.1238  1
1966 Cowsik R, Pal Y, Tandon SN, Verma RP. 3°K blackbody radiation and leakage lifetime of cosmic-ray electrons Physical Review Letters. 17: 1298-1300. DOI: 10.1103/PhysRevLett.17.1298  1
1966 Cowsik R, Pal Y, Tandon SN. Evaluation of high energy natural neutrino experiments Proceedings of the Indian Academy of Sciences - Section A. 63: 217-243. DOI: 10.1007/BF03049032  1
1964 Cowsik R, Pal Y, Tandon SN. Experimental limits on a possible neutrino degeneracy in the universe Physics Letters. 13: 265-267.  1
1963 Babu P, Cowsik R, Pal Y. Neutral pion production by 17 GeV negative pions in carbon Il Nuovo Cimento. 29: 785-800. DOI: 10.1007/BF02827943  1
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