Scientific Publications


Alak K. Ray


May 2007

In Journals

  1. "Type IIP Supernova SN 2004et: A Multi-Wavelength Study in X-Ray, Optical and Radio'' -- Kuntal Misra,   Dave Pooley,   Poonam Chandra,   D. Bhattacharya,   Alak K. Ray,   Ram Sagar,   and Walter H. G. Lewin,   2007,   submitted to MNRAS

  2. "Results from an extensive broadband simultaneous campaign on the underluminous active nucleus M81*'' -- Sera Markoff,   Michael Nowak,   Andrew Young,   Herman L. Marshall,   Claude Canizares,   Alison Peck,   Glen Petitpas,   Melanie Krips,   Rainer Schoedel,   Geoffrey Bower,   Poonam Chandra,   Alak Ray,   Michael Muno,   Sarah Gallagher,   and Seth Hornstein,   2007,   in preparation for Ap J.  

  3. "Chandra's Tryst with SN 1995N'' -- P. Chandra,   A. Ray,   E. Schlegel,   F.K. Sutaria,   and   W. Pietsch,   2005,   Ap J.,   629,   933

  4. "Detection of a radio counterpart to the 27 December 2004 giant flare from SGR 1806 - 20'' -- P. B. Cameron,   P. Chandra,   A. Ray,   S. R. Kulkarni,   D. A. Frail,   M. H. Wieringa,   E. Nakar,     E. S. Phinney,   Atsushi Miyazaki,   Masato Tsuboi,   Sachiko Okumura,   N. Kawai,   K. M. Menten,    F. Bertoldi,   2005,   Nature,   434,   1112

  5. "Baby Supernovae through the looking glass at long wavelengths" -- Poonam Chandra and Alak Ray, 2004, Bull. Astr. Soc. India, 32, 223

  6. "The late time radio emission from SN 1993J at meter wavelengths" -- P. Chandra, A. Ray, and S. Bhatnagar, 2004, Ap J., 612, 974

  7. "Synchrotron Aging and the Radio Spectrum of SN 1993J" -- P. Chandra, A. Ray, and S. Bhatnagar, 2004, Ap J. Lett., 604, 97

  8. "Deep optical observations of the fields of two nearby millisecond pulsars with the VLT" -- F. K. Sutaria, A. Ray, A. Reisenegger, G. Hertling, H. Quintana and D. Minniti, 2003 A & A,  406, 245

  9. "The nature of prompt X-ray and radio emission from SN 2002ap" -- F. K. Sutaria, P. Chandra, S. Bhatnagar and A. Ray, 2003, Astronomy & Astrophysics, 397, 1011

  10. "Radio studies of young core collapse supernovae" -- P. Chandra, A. Ray and S. Bhatnagar, 2002, Bull. Astr. Soc. India, 30, 755

  11. "Chandra and ASCA X-ray observation of Supernova 1979C in NGC 4321" -- A. Ray, R. Petre, and E. Schlegel, 2001, Astron. J, 122, 966

  12. "Oscillation effects on Neutrinos from the early phase of a nearby Supernova" -- D. Majumdar, A. Raychaudhury, K. Kar, A. Ray, F.K. Sutaria, 2000, Int. J. Mod. Phys. A15, 2105

  13. "Deep optical observations at the position of PSR 1706-44 with the VLT" -- P. Lundqvist, J. Sollerman, A. Ray, B. Leibundgut & F. Sutaria, 1999, A & A,  345, L15

  14. "Nuclear properties in early stages of stellar collapse" -- F. K. Sutaria, A. Ray, J.A. Sheikh and P. Ring, 1999, Astron & Astrophys, 349, 135

  15. "Centroids of Gamow-Teller transitions at finite temperature in fp-shell neutron-rich nuclei" -- O. Civitarese and A. Ray, 1999, Physica Scripta,  59, 352

  16. "RXTE observation of PSR1706-44 and implications for theoretical models of pulsar emission" -- A. Ray, A.K. Harding, & M. Strickman, 1999, Ap. J., 513, 919

  17. "Half-lives and pre-supernova weak interaction rate for nuclei far away from the stability line" -- K.Kar, S.Chakravarti, A.Ray and S.Sarkar, 1998, Jour. Phys. G, 24, 1641 (nucl-th/9806082)

  18. "Neutrino Spectroscopy of the Early Phase of Nearby Supernovae" -- F.K. Sutaria and A. Ray, 1997, Phys. Rev. Lett.,  79, 1599

  19. "Relativistic Mean Field calculations of nuclear properties in early stages of stellar collapse" -- F. K. Sutaria, J. A. Sheikh, & A. Ray, 1997, Nucl. Phys., A621, 375c

  20. "Gamow-Teller strength distributions for nuclei in presupernova stellar cores" -- F. K. Sutaria and A. Ray, 1995, Phys. Rev C 52, 3460

  21. "Circulation of matter and evolution of the internal magnetic field in neutron stars" -- V. A. Urpin and A. Ray, 1994, M.N.R.A.S. 267, 1000

  22. "Beta decay rates of fp shell nuclei with A $>$ 60 in massive stars at presupernova stage" -- K. Kar, A. Ray and S. Sarkar, 1994, Ap. J.,  434, 662

  23. "The bolometric light curve of SN1993J and the nature of its progenitor" -- A. Ray, K. P. Singh and F. K. Sutaria, 1993, J. Astrophys and Astron.,  14, 53

  24. "Evolution of massive binary stars in the LMC and its implications for radio pulsar population" -- N. Rathnasree and A. Ray, 1992, J. Astrophys and Astron.,  13, 3

  25. "Neutral and charged current mediated neutrino heating of supernova shocks and Supernova 1987A" -- A. Ray and K. Kar, 1992, Astrophys Lett and Comm,  28, 271

  26. "Beta decay rates of fp shell nuclei in advanced evolutionary stages of presuepernova stars" -- K. Kar, S. Sarkar and A. Ray, 1991, Physics Letters B261, 217 ; erratum: 1992, Phys Lett B277, 528

  27. "Evolution of binary stars in the LMC with helium enrichment" -- A. Ray and N. Rathnasree, 1991, M.N.R.A.S.,  250, 453

  28. "The formation and detection of strongly magnetic white dwarf binaries in Globular Clusters" -- G. Chanmugam, A.Ray and K. P. Singh, 1991, Ap J.,  375, 600

  29. "Strongly magnetic white dwarf binaries in globular clusters" -- A. Ray and G. Chanmugam, 1990, Ap J. Letters, 350, L9

  30. "Genesis of globular cluster pulsars" -- A. Ray and W. Kluzniak, 1990, Nature, 344, 415

  31. "Preheating of unshocked material by electron neutrino burst in core bounce supernovae" -- A. Ray and K. Kar, 1989, Phys. Rev. Lett., 63, 2435

  32. "Formation of millisecond pulsars in the Globular Clusters" -- A. Ray and A. Kembhavi, 1988, Mod. Phys. Lett.,  A3, 229

  33. "Evolution of tidal capture binaries" -- A. Ray, A. Kembhavi and H.M. Antia, 1987, Astronomy and Astrophys.,  184 , 164

  34. "Late time neutrino heating and energetics of stalled shocks in type-II Supernovae" -- A. Ray and K. Kar, 1987, Astrophys. J.,  319, 143

  35. "Thermal regeneration of neutron star magnetic fields in binary radio and X-ray pulsars?" -- A. Ray and A. Kembhavi, 1985, Mon. Not. Roy. Astr. Soc., 217, 753

  36. "General relativistic effects of rotation on the structure and surface redshifts of fast pulsars" -- B. Datta, R.C. Kapoor and A. Ray, 1984, Bull. Astr. Soc. India,  12 , 343

  37. "Electron capture supernovae: One zone collapse calculation for stars with masses 10 M$_{\odot}$ and 15 M$_{\odot}$" -- A. Ray, S.M. Chitre and K. Kar, 1984, Ap. J.,  285, 766

  38. "Rotating neutron star structure: implications of the millisecond pulsar PSR 1937+214" -- A. Ray and B. Datta, 1984, Astrophys. J.,  282 , 542

  39. "Rotational and orbital evolution of cataclysmic binaries containing magnetic white dwarfs" -- G. Chanmugam and A. Ray, 1984, Astrophys. J.,  285, 252

  40. "Lower bounds of neutron star mass and moment of inertia implied by the millisecond pulsar" -- B. Datta and A. Ray, 1983, M.N.R.A.S.,  204, 75p

  41. "Electron capture during gravitational collapse of a type II Supernova" -- K. Kar and A. Ray, 1983, Phy. Lett.,  A96 , 322

  42. "Some characteristics of a rapidly rotating, magnetised neutron star" -- A. Ray and S.M. Chitre, 1983, Nature, 303 , 409

  43. "Sufficient condition for the weak minimum of a functional depending on n functions and their derivatives"   --  A. Ray, 1983, J. Math. Phys.,  24 , 1395

  44. "A boundary coupled generalization of the Newcomb stability criterion" -- A. Ray and G. Van Hoven, 1982, Phys. Fluids,  25 , 1355

  45. "Hydromagnetic stability of solar coronal arcades : effects of photospheric line-tying" -- A. Ray and G. Van Hoven, 1982, Solar Phys.,  79 , 353

  46. "Electron-Positron Cascades in pulsar outer-gaps" -- A. Ray and G. Benford, 1981, Phys. Rev. D23 , 2142

  47. "Thermal conduction across neutron star crusts and cooling of young neutron stars" -- A. Ray, 1981, Nucl. Phys. A356, 523

  48. "An unstable solution of hydromagnetic equations in an infinite plasma cylinder and pulsar magnetic fields" -- A. Ray, 1980, Phys. Fluids, 23, 898

  49. "Conformational flexibility and Protein folding" -- B. Honig, A. Ray and C. Levinthal, 1976, Proc. Nat. Acad. Sci. (USA) 73, 1974


In Conference Proceedings

  1. "Electron injection in a young supernova and evolution towards a Supernova remnant" -- Alak Ray, Swapan Chattopadhyay and Poonam Chandra, to be published in the ``Proc. of the Workshop on Supernova 1987A: 20 Years After; Supernovae and Gamma-Ray Bursters" at Aspen, Colorado, USA ed. Kurt Weiler, Stefan Immler, Richard McCray, 2007, AIP Conference Series.

  2. "Implications of aging in young supernovae" -- Poonam Chandra and Alak Ray, Proc. of the Workshop on "1604/2004 Supernovae as Cosmological Lighthouses" at Padua, Italy, ed. M. Turatto et al, ASP Conference Series, Vol 342, 2005, p. 430.

  3. "Stars as thermonuclear reactors: their fuels and ashes" -- A. Ray, Lecture Notes on Nuclear Astrophysics at the Fifth SERC School on Nuclear Physics at Panjab University, Chandigarh, in ``Radioactive Ion Beams and Physics of Nuclei  away from the line of Stability" (eds. I.M. Govil and R.K. Puri), Elite Publishing, New Delhi (2003). (This paper is referenced by Wikipedia: Stellar_nucleosynthesis).

  4. "Low frequency observations of SN 1993J with Giant Meterwave Radio Telescope" -- P. Chandra, A. Ray and S. Bhatnagar, in the Proceedings of IAU Colloquium 192 "Supernovae (10 years of SN 1993J)", Valencia, Spain, (eds. J. M. Marcaide and K. W. Weiler).

  5. "Low frequency radio and X-ray properties of core-collapse supernovae" -- A. Ray, P. Chandra, F.K. Sutaria and S. Bhatnagar, in the Proceedings of IAU Colloquium 192 "Supernovae (10 years of SN 1993J)", Valencia, Spain, (eds. J. M. Marcaide and K. W. Weiler), p. 145 (2005).

  6. "X-ray and radio prompt emission from a hypernova SN 2002ap" -- P. Chandra, A. Ray and F.K. Sutaria, Nucl. Phys. B 132, 308, (2004) in Proceedings of the 2nd Beppo-SAX Conference: "The Restless High-Energy Universe", Amsterdam (eds. E.P.J. van den Heuvel, J.J.M. in 't Zand, and R.A.M.J. Wijers).

  7. "Search for the optical counterparts of PSR J1744-1134 and J1024-0719with the VLT" -- F. K. Sutaria, A. Ray, A. Reisenegger, G. Hertling and H. Quintana, in Procs of Palermo Workshop on "Pulsars, AXPs and SGRs observed with BeppoSAX and other Observatories", Marsala, Italy, September 2002.

  8. "X-ray and radio bright type Ic SN 2002ap -- a hypernova without an associated GRB" -- F. K. Sutaria, A. Ray and P. Chandra, in Procs ESO Workshop "From Twilight to Highlight -- The Physics of Supernovae" ESO/MPA/MPE Workshop at Garching, July 2002, p.287.

  9. "Discussion on a possible neutrino detector located in India" -- M.V.N. Murthy,... A. Ray, J. Learned and 23 others, in Procs of Workshop on High Energy Particle Physics - Pramana 54, 347 (2000).

  10. "Pulsar observations in the optical with the Very Large Telescope" -- A. Ray, P. Lundqvist, J. Sollerman, B. Leibundgut, F. Sutaria Pulsar Astronomy: 2000 and beyond Procs of IAU Colloq 177 Bonn (ed M. Kraemer et al), p. 305 (2000).

  11. "X-ray observation of radio supernova SN1979C by ASCA" -- A. Ray, R. Petre & E. Schlegel, in Greatest explosions since the big bang: supernovae and gamma-ray bursts; Procs of the Space Telescope Science Institute May 1999 Workshop (ed M. Livio et al) p. 55 (1999)

  12. "Search for X-ray pulsations from PSR 1706-44 with RXTE" -- A. Ray, A.K. Harding  and  M. Strickman, Procs Workshop on Neutron Stars and Pulsars, Tokyo, Japan, (ed S. Shibata et al) p 375 (1998).

  13. "RXTE observation of PSR1706-44" -- A. Ray, A.K. Harding and  M. Strickman, in Procs of the Fourth Compton Symposium, Williamsburg, VA, p. 607 (ed. C. Dermer et al), AIP Press, 1997.

  14. "Electron Capture in Early Gravitational Collapse - Nuclear Equation of State " -- A. Ray, F.K. Sutaria \& J.A. Sheikh Procs Workshop on Supernova 1987A : Ten Years Later, La Serena, Chile, PASP (ed N. Suntzeff, M. Philiips), in the press, (astro-ph/9707218).

  15. "Gamow Teller strength distribution from charge exchange reactions and neutrinos from electron capture in stellar collapse"  -- F. K. Sutaria and A. Ray in International Symposium on Nuclear Astrophysics, Gran Sasso, Italy, July, 1994.

  16. "Pulsar timing residuals and gravitational radiation from binaries" -- A. Ray and W. Kluzniak (in preparation); an abstract published in IAU GA XXII, S.165.VT.145, ed H. van Woerden.
  17. "Pulsars in globular clusters" -- A. Ray in the Proceedings of the 6th Asia Pacific Regional meeting of the IAU, Pune, J. Astrophys. Astron. (Suppl.) 16, 215 (1995).

  18. "Weak interaction rates for nuclei in presupernova stars" -- A. Ray, K. Kar, S. Sarkar and S. Chakravarti in Proc. of the IAU Colloquium No 145 on Supernovae and Supernova Remnants, Xian, China (ed. R. McCray and Z. Wang, 1996).

  19. "Stellar weak interaction rates for nuclei with A $>$ 60" -- A. Ray, K. Kar, S. Sarkar and S. Chakravarti in Nuclei in the Cosmos, Proc. of the 2nd International Symposium on Nuclear Astrophysics, Karlsruhe p. 363 (ed. F. Kaeppeler and K. Wisshak 1993).

  20. "X-ray luminosity functions of magnetised cataclysmic variables in globular clusters" -- A. Ray, G. Chanmugam and K. P. Singh in Proceedings of the Vina del Mar Workshop on Cataclysmic Variables, Chile, A.S.P. Series  29, 222 (ed. N. Vogt, 1992).

  21. "From millisecond pulsars to low mass X-ray binaries" -- W. Kluzniak, M. Czerny and A. Ray, in "X-ray binaries and recycled pulsars", ed. E. P. J. van den Heuvel and S. Rappaport, Kluwer Publishers, p. 425 (1992).

  22. "Delayed neutrino heating and shock revival in type II supernovae" -- K. Kar and A. Ray, in "Supernovae and Stellar Evolution", World Scientific Publishing Company, Singapore. p 234 (1991).

  23. "Pre supernova evolution, gravitational collapse and explosion: report of the working group" -- B. Datta and A. Ray, in ``Supernovae and Stellar Evolution": Proceedings of School and Workshop at Goa, World Scientific Publishing Co., Singapore, p 307 (1991).

  24. "Beta decay of some fp-shell nuclei in presupernova stars" -- K. Kar, S. Sarkar and A. Ray, A.I.P. Conference Proceedings No. 238, ``Capture Gamma Ray Spectroscopy", Pacific Grove, Calif. (ed R. W. Hoff, 1990).

  25. "Neutrino inelastic scattering and prompt shocks in core bounce supernovae" -- A. Ray, in ``Supernovae", ed S. E. Woosley, p 362 (Springer Verlag, 1991).

  26. "A new class of strongly magnetic CVs in globular clusters" -- G. Chanmugam and A. Ray, in Proc of 11th North American Workshop on Cataclysmic Variables and Low Mass X-ray Binaries, ed. C. W. Mauche (Cambridge Univ Press, 1990).

  27. "Evolutionary origin of globular cluster pulsars" -- W. Kluzniak and A. Ray, in Proc of 11th North American Workshop on Cataclysmic Variables and Low Mass X-ray Binaries, ed C. W. Mauche (C.U.P. 1990).

  28. "Tidal effects on stellar evolution in close binaries formed in Globular Clusters" -- H.M. Antia, A. Kembhavi and A. Ray, in Proc. of IAU Symposium No. 126 on Globular Clusters at Cambridge, Mass. (August 1986), ed. J. Grindlay and A.G. Davis Philip, p 671 (1988).

  29. "Evolution of a 10M$_{\odot}$ star with LMC metallicities" -- N. Rathnasree and A. Ray in Proc. of the IAU Colloq No. 106 on ``Evolution of Peculiar Red Giant Stars" in Bloomington, Indiana, July 27-29, 1988.

  30. "Observational Results from SN1987A and their implications on theoretical modeling of Supernovae" -- A. Ray, Kodaikanal Observatory Bulletin 10 , 59 (1988).

  31. "Coronal arcades in the Sun and their hydromagnetic stability" -- A. Ray, in Proc. of IAU Symp. No. 107 on Unstable Current Systems and Plasma  Instabilities in Astrophysics, p. 483, (ed. M.R. Kundu, 1985).

  32. "Gamma-radiation mechanisms in pulsar `Outer gaps'" -- A. Ray and G. Benford, Proc. International Workshop on Very High Energy Gamma-ray Astronomy, Ootacamund, p. 286, (ed. P.V. Ramana Murthy, 1982).

  33. "Thermal conductivity in two regions of a neutron star" -- A Ray, Proc. 16th Int. Thermal Conductivity Conf., Chicago, p. 165, (ed. D. Larsen, 1983).

  34. "A diamond as big as the Ritz" -- E. Flowers, A. Ray, M. Ruderman, E. Spiegel, Tran. N.Y. Acad. Sci. II (Festschrift for I. I. Rabi) 38 , 54 (1977).

  35. "Optical and electronic transport properties of amorphous semiconductors" -- M. Martens, A. Ray and F. Williams, Proc. of Int. Conf. on Liquid and Amorphous Semiconductors (Garmisch-Partenkirchen) 2 , 1087 (1973).



Book, Book Review  and Astronomical Circulars: 

  1. "Radio non-detection of SN 2006gy with GMRT in the L-band" -- Poonam Chandra, Sayan Chakraborti and Alak Ray, Astronomers Telegram No. 1082 (2007).

  2. ``Proceedings of the Workshop on Supernovae, Gamma-Ray Bursts and Pulsars" held at Tata Institute, Mumbai, CD-ROM and web versions (2005), ed.   A. Ray,  www.tifr.res.in/$\sim$sn2004 .

  3. "GRB050401: radio observation at 610 MHz with GMRT" -- P. Chandra, and A. Ray, GCN 3178 (2005)

  4. "Supernova 2004dj in NGC 2403" -- P. Chandra, and A. Ray, IAU Circular No. 8397 (2004).

  5. "Supernova 2002hh in NGC 6946" -- P. Chandra, A. Ray and S. Bhatnagar, IAU Circular No. 8041 (2003).

  6. "Supernova 2001ig in NGC 7424" -- P. Chandra, A. Ray and S. Bhatnagar, IAU Circular No. 7994 (2002).

  7. "Supernova 2001gd in NGC 5033" -- P. Chandra, A. Ray and S. Bhatnagar, IAU Circular No. 7982 (2002).

  8. "Supernovae 1993J and 1979C (in the 610 MHz and 1420 MHz bands with GMRT)" -- P. Chandra, S. Bhatnagar, and A. Ray, IAU Circular No. 7657 (2001).

  9. "Theory of neutron star magnetospheres", by F. Curtis Michel - reviewed by A. Ray, Ind. J. Phys. 68B (5), 469 (1994).
  10. "Supernova shells and their birth events" (Procs of Workshop at Bad Honnef, ed W. Kundt, Springer) - reviewed by A. Ray, Ind. J. Phys. 65B, No. 2 (1991).

  11. "Supernovae and Stellar Evolution" : Proceedings of the School and Workshop at Goa, ed. A. Ray and T. Velusamy, World Scientific Publishing Co., Singapore (1991).



Alak K. Ray  22 May, 2007