IIAP Publications: Recent submissions

  • The dependence of He I 10830 absorption on X-ray luminosity in RS CVn binaries and very active F and G main-sequence stars 
    Mekkaden, M. V (Kluwer Academic Publishers, 1985-03)
    A study of the relationship between soft X-ray luminosity and He I 10830 equivalent width in RS CVn binaries and very active late-type main-sequence stars is made. Long-period RS CVns and very active F and G main-sequence ...
  • Type II burst high time resolution and polarization characteristics at frequencies higher than 200 MHz 
    Zlobec, P; Thejappa, G (Hvar Observatory Bulletin, 1987)
    Some new results based on high time resolution and polarization studies of solar type II radio bursts are presented. It is found that the fine structures are present in some events whereas they are completely absent in few ...
  • Solar coronal bright points observed with the VLA 
    Habbal, S. R; Ronan, R. S; Withbroe, G. L; Shevgaonkar, R. K; Kundu, M. R (The American Astronomical Society, 1986-07)
    The first observations of solar coronal bright points made at 20-cm wavelength with the VLA are reported. The brightness temperature of the sources observed varies between 1 and 5 x 10 to the 5th K. The observations indicate ...
  • The far-infrared (IRAS) excess in HD 161796 and related stars 
    Parthasarathy, M; Pottasch, S. R (European Southern Observatory, 1986-01)
    The far infrared IRAS measurements of the high galactic latitude F-supergiant HD 161796 and related stars are found to show strong far infrared excesses, due to large amounts of dust around them. For HD 161796 the dust ...
  • Narrow band photometry of selected asteroids 
    Rajamohan, R; Bhargavi, S. G (Lunar and Planetary Inst, 1992-12)
    The CCD photometry of selected asteroids was carried out to check for possible cometary activity in them. To distinguish the asteroids with possible cometary activity from those of the main belt, each object of interest ...
  • Spectrum variability of 25 Sextantis 
    Rajamohan, R; Paranjpye, A; Sajeev, T. P (Kluwer Academic Publishers, 1990-03)
    The identification of moderately strong spectral lines at a dispersion of 30 A per millimeter is given for the peculiar star 25 Sextantis. The observed variability of some of the lines are briefly described. It is found ...
  • Spectrum variability of some selected bright CP stars on the main sequence 
    Rajamohan, R (Kluwer Academic Publishers, 1990-03)
    The initial findings of a survey for spectrum variations in selected CP stars is reported. It is found that almost all observed mercury-manganese stars are spectrum variables. The implications of chemical anomalies in these ...
  • Three-dimensional structures of two solar active regions from VLA observations at 2, 6, and 20 centimeter wavelengths 
    Shevgaonkar, R. K; Kundu, M. R (The American Astronomical Society, 1984-08)
    Three-dimensional structures of two active region groups are determined from observations with the Very Large Array (VLA) at 2, 6, and 20 cm. One of the groups exhibits a single magnetic loop of length approximately 10 to ...
  • Effects of rotation on colours and line indices of stars. III - Binary and peculiar stars 
    Rajamohan, R; Mathew, A (Kluwer Academic Publishers, 1990-02)
    The broad-band UBV colors and the intermediate band uvby colors of Alpha Persei, Pleiades, and the Scorpio-Centaurus association are analyzed for rotation effects. An attempt was made to discriminate normal single stars ...
  • The spectrum variable HR 7817 = HD 194783 
    Rajamohan, R; Paranjpye, A (Konkoly Observatory, 1989-01)
  • 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 ...

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