IIAP Publications: Recent submissions

  • A detailed study of the geomagnetic storm of 8-10 March 1970 
    Balakrishnan, T. K; Varadarajan, R; Singh, S. B; Karunakaran, D; Aleem, P. S. M (National Institute of Science Communication And Information Resources, 1973-03)
    A comprehensive study of the geomagnetic oscillations during the storm of 8 – 10 March 1970 is made using data obtained from equatorial stations. The oscillation characteristics during the three main phases of the storm ...
  • On the clustering of GRBs on the sky 
    Sethi, S. K; Bhargavi, S. G; Greiner, J (American Institute of Physics, 2000-09)
    The two-point correlation of the 4th (current) BATSE catalog (2494 objects) is calculated. It is shown to be consistent with zero at nearly all angular scales of interest. Assuming that GRBs trace the large scale structure ...
  • Observing the GRB remnants 
    Bhargavi, S. G; Cowsik, R; Perna, R (Astronomical Society of the Pacific, 2004-06)
    Following the predictions of Perna, Reymond & Loeb (2000) we have proposed an observational program to search for the GRB remnants in nearby galaxies using the telescopes of Indian Institute of Astrophysics, Bangalore. We ...
  • Photospheric field gradient in the neighbourhood of quiescent prominences 
    Nagabhushana, B. S; Gokhale, M. H (Springer, 1990)
    We have determined statistically the horizontal gradiant of the vertical magnetic field in the neighbourhood of filaments inside and outside the active regions during a few months in 1981 and in 1984. The results show that ...
  • Indian Astronomical Observatory, Hanle 
    Cowsik, R; Srinivasan, R; Prabhu, T (Astronomical Society of the Pacific, 2002)
    The Indian Institute of Astrophysics (IIA) Bangalore has established the Indian Astronomical Observatory (IAO) at an altitude of 4500 m above mean sea level atop Mt. Saraswati, Hanle, Changthang Ladakh, India. The birth ...
  • Hot post-AGB stars 
    Parthasarathy, M; Gauba, G; Fujii, T; Nakada, Y (Kluwer Academic Publishers, 2001-08)
    From the study of IRAS sources with far-IR colors similar to planetary nebulae (PNe), several proto-planetary nebulae with hot (OB) post-AGB central stars have been detected. These stars form an evolutionary link between ...
  • Searching for GRB remnants in nearby galaxies 
    Bhargavi, S. G; Rhoads, J; Perna, R; Feldmeier, J; Greiner, J (American Institute of Physics, 2004-09)
    Gamma Ray Bursts (GRBs) are expected to leave behind GRB remnants, similar to how ``standard'' supernovae (SN) leave behind SN remnants. The identification of these remnants in our own and in nearby galaxies would allow a ...
  • Networking of astronomy libraries and resource sharing in India 
    Vagiswari, A; Louis, C (Astronomical Society of the Pacific, 1998)
    A brief description of the proposed networking of astronomy libraries in India is given. Three models are identified which may be introduced successively as and when all eight libraries acquire necessary software and hardware.
  • Growing importance of conference proceedings in astronomy and astrophysics and its impact on collection development 
    Vagiswari, A; Louis, C (Elsevier, 1995)
    This paper analyses the change in the referencing pattern among the astronomers. There has been an increase in the number of conference proceedings (CP) during the last 10 years. In astronomy alone there were around 131 ...
  • Origin of spatial variations of scattering polarization in the wings of the Ca I 4227 Å line 
    Sampoorna, M; Stenflo, J. O; Nagendra, K. N; Bianda, M; Ramelli, R; Anusha, L. S (The American Astronomical Society, 2009-07-10)
    Polarization that is produced by coherent scattering can be modified by magnetic fields via the Hanle effect. This has opened a window to explorations of solar magnetism in parameter domains not accessible to the Zeeman ...
  • BVRIJHK photometry of post-AGB candidates: evolution of post-AGB central stars 
    Fujii, T; Nakada, Y; Parthasarathy, M (Kluwer Academic Publishers, 2001-08)
    Post-AGB stars are generally believed to be on their way to the planetary nebula stage. However, there has been a question about the evolutionary path for the low-mass ones. We present BVRIJHK photometry of post-AGB ...
  • Identification of emission bands in P/Halley 
    Bhattacharyya, J. C; Babu, G. S. D; Ghosh, K. K; Jayakumar, K; Appakutty, M (Indian Academy of Sciences, 1986)
    Spectrophotometric studies of P /Halley (r = 1.98 AU, Δ= 1.19AU, r = 1.97, Δ = 1.16 AU and r = 1.95 AU, Δ. = 1.13 AU) in the spectral range 3900 A - 6450 A were made on three nights and identifications of emission features ...
  • The evolutionary status of HD 179821 
    Thévenin, F; Jasniewicz, G; Parthasarathy, M (Kluwer Academic Publishers, 2001-08)
    HD 179821 (IRAS 19114+0002) is classified as a moderately metal-poor ([Fe/H] = - 0.5) post-AGB star of Teff = 5660 K and also as a very massive supergiant of Teff = 6750 K. Recent detailed studies of this star are not able ...
  • The effect of strong magnetic fields on acoustic power in their surroundings at the surface of the sun 
    Nicholas, C. J; Thompson, M. J; Rajaguru, S. P (European Space Agency, 2004-10)
  • Outer rings of Saturn 
    Bhattacharyya, J. C; Vasundhara, R (Indian Academy of Sciences, 1985)
    A two component model of a possible ring structure at about 12.5 Saturn radii is presented here which can explain the shapes of the immersion and emersion occultation profiles obtained during the occultation of SAO 158913 ...
  • Application of local-area helioseismic methods as predictors of space weather 
    Jensen, J. M; Lundstedt, H; Thompson, M. J; Pijpers, F. P; Rajaguru, S. P (European Space Agency, 2004-10)
    Space weather is growing concern to our increasingly technological society. Here we discuss neural-network approaches to forecasting space weather, in which we plan to incorporate now-cast information about solar sub-surface ...
  • Comparison of GONG and MDI sound-speed anomalies beneath two active regions 
    Hughes, S. J; Rajaguru, S. P; Thompson, M. J (European Space Agency, 2004-10)
    Travel times of acoustic waves are calculated from Dopplergrams of solar oscillations obtained using the Global Oscillation Network Group (GONG) ground-based network and the Michelson Doppler Imager (MDI) instrument on ...
  • Spectroscopy of HD 168625 (IRAS 18184-1623) 
    García, L. P; Sivarani, T; Parthasarathy, M; Manchado, A (Kluwer Academic Publishers, 2001-08)
    HD 168625 (B9-A0 Ia) was classified as a post-AGB star and also as a luminous blue variable. We have analysed the high resolution optical spectra of HD 168625 and derived the atmospheric parameters and the chemical ...
  • Spectroscopy of post-AGB candidate IRAS 10215-5916 
    Sivarani, T; Parthasarathy, M; García, L. P; Manchado, A (Kluwer Academic Publishers, 2001-08)
    IRAS 10215-5916 was classified as a post-AGB star and also as a massive red supergiant. It was also found to be a spectroscopic binary. In our high resolution spectra we found molecular features from a cool star of Teff = ...
  • Spectroscopy of post-AGB candidate HD 331319 (IRAS 19475+3119) 
    Sivarani, T; Parthasarathy, M; García, L. P; Manchado, A (Kluwer Academic Publishers, 2001-08)
    HD 331319 is a F3 Ib star with a detached cold circumstellar dust shell with far-IR colours similar to planetary nebulae. From an analysis of high resolution spectra using LTE stellar atmospheric models, we have derived ...

Search DSpace


Browse

My Account