IIAP Publications: Recent submissions

  • Spectral classification at ultra-low dispersion 
    Rajamohan, R (D. Reidel Publishing Co., 1984-11)
    The accuracy of the ultralow-dispersion slitless-spectroscopy technique of Bappu and Parthasarathy (1977) in classifying early-type stars at great distances from the sun is investigated experimentally using a 5-min exposure ...
  • The H-alpha line profile in early type-binary systems HD 47129 and Gamma Velorum 
    Rajamohan, R (Kluwer Academic Publishers, 1984-02)
    A brief description of the variation of the Hα line profile in γ Velorum and HD 47129 is given.
  • Application of state-specific multireference Møller-Plesset perturbation theory to nonsinglet states 
    Mahapatra, U. S; Chattopadhyay, S; Chaudhuri, R. K (American Institute of Physics, 2009-01)
    We present molecular applications of a spin free size-extensive state-specific multireference perturbation theory (SS-MRPT), which is valid for model functions of arbitrary spin and generality. In addition to the singlet ...
  • Application of improved virtual orbital based multireference methods to N2, LiF, and C4H6 systems 
    Chattopadhyay, S; Chaudhuri, R. K; Mahapatra, U. S (American Institute of Physics, 2008-12)
    The improved virtual orbital (IVO) complete active space configuration interaction (CASCI) based multiconfigurational quasidegenerate perturbation theory (MCQDPT) and its single-root version (termed as MRMPPT) are applied ...
  • On the orientation of the pulsar space velocity vector relative to the spin axis 
    Kochhar, R. K (Nature Publishing Group, 1977-05)
    It is noted that the angle between the space velocity vector and the spin axis projected on the plane of the sky has a value close to zero deg for three pulsars, close to 90 deg for six others, and between zero and 90 deg ...
  • Runaway stars as witnesses to supernova explosions 
    Kochhar, R. K (Nature Publishing Group, 1978-02)
    A hypothesis is proposed according to which single runaway stars are released from close binaries in which the companion star explodes as a carbon detonation supernova and is totally disrupted. From the stars which can ...
  • A classification scheme for pulsars 
    Kochhar, R. K (Nature Publishing Group, 1977-11)
    The implications of a pulsar classification scheme are discussed. Three types of pulsars are distinguished - Type S (S for single) from supernova explosions of single stars; type D (D for disrupted) from binaries disrupted ...
  • French astronomers in India during the 17th - 19th centuries 
    Kochhar, R. K (British Astronomical Society, 1991-04)
    The contributions made by French astronomers from India are reviewed. The French were more successful on the scientific front than on the colonial. The first telescopic discovery from India was made by a French Jesuit ...
  • On a connection between supernova occurrence and tidal interaction in early type galaxies 
    Kochhar, R. K (International Astronomical Union, 1990-11)
    There are three types of supernovae: two subtypes SNIa and Ib; and SNII. Late type galaxies produce all types of SN, whereas early types (E, SO, and non-Magellanic irregulars IO) have hosted only SNIa. The recently identified ...
  • A catalogue of the observations of the mutual phenomena of the Galilean satellites made in 1991 during the PHEMU91 campaign 
    Arlot, J. E; Ruatti, C; Thuillot, W; Arsenijevic, J; Baptista, R; Barroso, J; Bauer, C; Berthier, J; Blanco, C; Bouchet, P; Bourgeois, J; Bulder, H. J. J; Burchi, R; Cano, J. A; Casas, R; Chauvet, F; Chis, D; Colas, F; Colin, J; D'Ambrosio, V; de Angelis, G; de Benedetto, G; Denzau, H; Desbats, J. M; Descamps, P; Dipaolantonio, A; Dumitrescu, A; Farcas, L; Federspiel, M; Flatres, T; Froeschle, M; Gherega, O; Gomez-Forrellad, J. M; Guarro, J; Hainaut, O; Horvat, A; Helmer, G; Hube, D; Ito, Y; Kidger, M; Lecacheux, J; Le Campion, J. F; Le Floch, J. C; Mallama, A; Martin, B. E; Mellilo, J. F; Meyer, C; Molau, S; Montignac, G; Morando, B; Nicolet, B; Nitschelm, C; Oprescu, G; Piersimoni, A; Przewozny, D; Protitch-Benishek, V; Rapaport, M; Riou, A; Sacre, J. J; Sevre, F; Shkodrov, V; Souchay, J; Takami, H; Taylor, R; Tholen, D. J; Turcu, V; Vasundhara, R; Vidal, J; Vu, D. T; White, G; Wilds, R. P (EDP Sciences, 1997-11)
    In this paper, all the light-curves obtained during the PHEMU91 campaign of observations of the mutual phenomena of the Galilean satellites are presented. These observations give accurate astrometric positions of major ...
  • Supernovae in early-type galaxies 
    Kochhar, R. K (Kluwer Academic Publishers, 1989-07)
    It is argued that all SNI come from short-lived stars and do not occur in a typical, isolationist, gas-free early-type galaxy. SNI occur only in those galaxies which accrete gas and form stars. SN properties of E/SOs are, ...
  • M418: the low excitation PN around a WC1L star 
    Surendiranath, R; Kameswara Rao, N (International Astronomical Union, 1993)
  • A theory of Jovian shadow bursts 
    Gopalswamy, N (D. Reidel Publishing Co., 1986-06)
    The shadow events in the dynamic spectra of Jovian decametric emission are explained as the result of interaction between electron bunches responsible for S and L emissions. The relevant dispersion relation is derived for ...
  • Magnetic activity in the photosphere of CoRoT-Exo-2a. Active longitudes and short-term spot cycle in a young Sun-like star 
    Lanza, A. F; Pagano, I; Leto, G; Messina, S; Aigrain, S; Alonso, R; Auvergne, M; Baglin, A; Barge, P; Bonomo, A. S; Boumier, P; Collier Cameron, A; Comparato, M; Cutispoto, G; de Medeiros, J. R; Foing, B; Kaiser, A; Moutou, C; Parihar, P. S; Silva-Valio, A; Weiss, W. W (EDP Sciences, 2009-01)
    Context: The space experiment CoRoT has recently detected transits by a hot Jupiter across the disc of an active G7V star (CoRoT-Exo-2a) that can be considered as a good proxy for the Sun at an age of approximately 0.5 ...
  • Optical photometry and spectroscopy of the Type Ibn supernova SN 2006jc until the onset of dust formation 
    Anupama, G. C; Sahu, D. K; Gurugubelli, U. K; Prabhu, T. P; Tominaga, N; Tanaka, M; Nomoto, K (Royal Astronomical Society, 2009-01)
    We present optical UBVRI photometric and spectroscopic data of the Type Ibn supernova SN 2006jc, until the onset of the dust-forming phase. The optical spectrum shows a blue continuum and is dominated by the presence of ...
  • On the statistical detection of propagating waves in polar coronal holes 
    Gupta, G. R; O'Shea, E; Banerjee, D; Popescu, M; Doyle, J. G (EDP Sciences, 2009-01)
    Context. Waves are important to the study of dynamical processes in coronal holes and the acceleration of the fast solar wind. A spectral time series was taken with the SUMER spectrometer on-board SoHO on 20 October 1996. ...
  • Abundances of classical cepheids and evidence for secondary star formation 
    Giridhar, S (International Astronomical Union, 1987)
  • Decollimation of a jet due to spacetime curvature 
    Kapoor, R. C (International Astronomical Union, 1986)
  • Acceleration of cometary plasma tails 
    Kundt, W; Krishan, V (Kluwer Academic Publishers, 1988-04)
    Cometary plasma tails are accelerated by the solar wind to ≈ half its velocity, corresponding to some 10/sup2 times the solar-wind momentum density. The authors corroborate Alfvén's (1957) "wind-sock" mechanism according ...
  • 20" Bhavnagar telescope: a brief history 
    Rajamohan, R; Samson, J. P. A (Indian Institute of Astrophysics, 1984)

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