Publications of Astronomical Society of India: Recent submissions

  • Near absence of hard X-ray pulsation from GS 1843+00 in the middle of burst phase 
    Manchanda, R. K (Astronomical Society of India, 2000)
    Hard X-ray transient pulsar GS 1843+00 was observed in the 20-200keV region using a high sensitivity large area scintillation counter instrument during its 1997 flare on March 30. The data indicates a near absence of 29.5s ...
  • Radio emission from Cyg X-3 
    Apparao, K. M. V (Astronomical Society of India, 2000)
    The acceleration of high energy particles by a shock produced by the passage of the secondary object in the binary system, through the wind of the primary, is considered and is shown to be adequate to account for the ...
  • Hard X-rays and gamma rays from the Be star LSI +61-303 
    Apparao, K. M. V (Astronomical Society of India, 2000)
    The hard x-ray flux resulting from inverse Compton scattering of photons from the Be star by the high energy electrons responsible for the radio emission, is calculated and compared with observation.
  • Optical spectroscopy of SN1998S 
    Anupama, G. C; Pandey, G; Sivarani, T (Astronomical Society of India, 2000)
  • Near-infrared spectroscopy of nova Sagittarii 1998 
    Ashok, N. M; Chandrasekhar, T (Astronomical Society of India, 2000)
    Near-infrared spectra of Fe-II type nova, Nova Sagittarii 1998 obtained during the period 30 to 70 days after the discovery date are presented. The near infrared spectrum is dominated by emission lines of hydrogen and ...
  • The merger time of binary globular clusters 
    Ballabh, G. M; Alladin, S. M (Astronomical Society of India, 2000)
    In a binary globular cluster the tidal forces increase the internal energy of the clusters and may lead to either merger or disruption of a cluster depending upon whether the two clusters are !of equal mass or vary much ...
  • Binary star clusters in galaxies : Our galaxy 
    Subramaniam, A; Gorti, U; Sagar, R; Bhatt, H. C (Astronomical Society of India, 2000)
  • A new look at the OB associations and star clusters in the Puppis-Vela region using HIPPARCOS data 
    Subramaniam, A; Bhatt, H. C (Astronomical Society of India, 2000)
    The Puppis-Vela region contains a few OB associations and young star clusters which are the imprints of recent star formation. As this region comprises of many star clusters in the line of sight, accurate distance and ...
  • Survey for roAp stars in the northern sky from Naini Tal 
    Ashoka, B. N; Seetha, S; Raj, E; Chaubey, U. S; Gupta, S. K; Joshi, S; Martinez, P; Kurtz, D. W; Sagar, R; Kasturirangan, K (Astronomical Society of India, 2000)
    Of the 31 known rapidly oscillating Ap (roAp) stars, 28 are in the southern sky and majority of them were discovered at SAAO indicating that a systematic survey also is needed in the northern sky. Therefore, a project has ...
  • Photometric observations of the AM CVn star EC 15330-1403 
    Seetha, S; Ashoka, B. N; Raj, E; Kasturirangan, K (Astronomical Society of India, 2000)
  • Internal rotation and toroidal part of the magnetic field of AB Doradus 
    Hiremath, K. M (Astronomical Society of India, 2000)
    We solve analytically Chandrasekhar's (1956) MHD equations for the steady parts of internal rotation and toroidal component of the magnetic field of the AB Doradus. By taking observed (Donati and Cameron 1997) surface ...
  • Asymptotic giant branch stars in the ISOGAL survey 
    Ojha, D. K; Omont, A; Simon, G; Blommaert, J (Astronomical Society of India, 2000)
    We present and analyse the data of a field at 1 = 0o, b = +1o from the ISOGAL survey of selected areas of the inner Galactic bulge at 15 and 7 ?m. In combination with IJKs data from the near-infrared southern sky survey ...
  • Gamma ray astronomy : New Indian initiatives 
    Bhat, C. L (Astronomical Society of India, 2000)
    In this brief review, major new initiatives presently under implementation in India in the field of gamma-ray astronomy are discussed in the backdrop of the just-concluded exploratory phase in the field.
  • Indian Astronomical Observatory, Hanle 
    Prabhu, T. P (Astronomical Society of India, 2000)
    The high-altitude astronomical station of Indian Institute of Astrophysics at Mt. Saraswati, Hanle, will function as a full-fledged observatory with one 2-m and one 50-cm telescopes by the winter of 1999. The telescopes ...
  • Mid-and far-infrared studies of galactic compact H II regions 
    Ghosh, S. K (Astronomical Society of India, 2000)
    Several Galactic H II region complexes have been observed in the far infrared (FIR) wavebands using the TIFR 1-m balloon borne telescope, and in the mid infrared (MIR) using the Infrared Space Observatory (ISO). Many of ...
  • Birth and early evolution of planetary nebulae 
    Parthasarathy, M (Astronomical Society of India, 2000)
    Birth and early evolution of planetary nebulae is described. The study of the young planetary nebula Hen 1357 (Stingray Nebula) with HST is discussed. The observed characteristics of few interesting PPNe and PNe are ...
  • Perspective of long baseline optical interferometry 
    Saha, S. K; Morel, S (Astronomical Society of India, 2000)
    This article is a sort of sequel of the earlier extensive review by Saha (1991a) where emphasis was laid down on the ground based single aperture, as well as on the working long baseline optical interferometers (LBI) ...
  • Lyman break galaxies at high redshifts (Z > 3) as probes of galaxy formation 
    Ravindranath, S; Prabhu, T. P (Astronomical Society of India, 2000)
    We propose the study of star - forming galaxies at high redshifts with large 10-m class telescopes. Lyman break galaxies serve as the best candidates to probe galaxy formation and evolution. The faintness of these objects ...
  • Optical counter-parts of Gamma Ray Bursts 
    Bhat, P. N (Astronomical Society of India, 2000)
    Gamma Ray Bursts (GRB'S) being the most energetic astronomical phenomena known to date still pose a formidable challenge to astronomers. The BATSE on board the Compton Observatory (CGRO) launched in 1991, has shown that ...
  • Globular cluster systems in giant elliptical galaxies : a probe for the galaxy formation and evolution 
    Subramaniam, A; Sagar, R (Astronomical Society of India, 2000)
    Most of the globular clusters in the universe reside in gaint elliptical galaxies. The number of GCs present in them is about a few thousands. Due to their large distances (> 10 Mpc), it is impossible to observe their ...

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