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Browsing Publications of Astronomical Society of India by Title

Browsing Publications of Astronomical Society of India by Title

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  • N-body problem 
    Bhatnagar, K. B; Saha, L. M (Astronomical Society of India, 1993-03)
    This is a review article on the N-body problem. The development of the qualitative methods regarding the various topics of Celestial Mechanics are presented in a systematic way starting from the early researches of the ...
  • N-body simulations of galaxy collisions 
    Namboodiri, P. M. S; Sastry, K. S; Narasimhan, K. S. V. S (Astronomical Society of India, 2001)
    The tidal effects of close collisions between two spherical galaxies of different mass and mass distributions are studied by numerical simulations. The galaxies are represented by polytropes of indices n = 4 and n = 0 which ...
  • Naini Tal-Cape survey for pulsating chemically peculiar stars - A status report 
    Seetha, S; Chaubey, U. S; Girish, V; Joshi, S; Ashoka, B. N; Gupta, S. K; Kurtz, D. W; Martinez, P; Sagar, R (Astronomical Society of India, 2001)
    The "Naini Tal-Cape survey for rapidly oscillating Ap stars", to search the northern hemi-sphere sky for pulsating stars was initiated in 1997. This is a collaboration between India and South Africa. So far about 70 stars ...
  • Narrow band photometry of Comet Halley in the emission bands and the continuum 
    Babu, G. S. D; Nathan, J. S; Rajamohan, R; Sivaraman, K. R (Astronomical Society of Indian, 1989-09)
    IHW filter photometry of Comet Halley was carried out on seven nights during pre-perihelion period and on six nights during post-perihelion period, using the 40-cm telescope at the Vainu Bappu Observatory, Kavalur, as a ...
  • Narrow-line Seyfert 1 galaxies 
    Dewangan, G. C (Astronomical Society of India, 2001)
    Narrow-line Seyfert 1 (NLS1) galaxies form a distinct subclass of Seyfert 1 galaxies. Optical spectroscopic and X-ray spectral and timing results on NLS1 and the plausible underlying physical parameters thought to be ...
  • NATO Advanced Study Institute on Energy Sources and Emission Mechanisms of Quasars 
    Ramadurai, S (Astronomical Society of India, 1977-12)
  • The nature of chromospheric active regions on V410 Tauri 
    Mekkaden, M. V; Pukalenthi, S; Muneer, S; Bastian, A. B (Astronomical Society of India, 2005-12)
    We present spectroscopic observations in the region of H alpha and Li I lines of the weak emission T Tauri star V410 Tau obtained over 1999/2000, 2002/2003 and 2003/2004 seasons. The emission strength showed rotational ...
  • The nature of the progenitors of supernovae of type I 
    van der Bergh, Sidney (Astronomical Society of India, 1982-09)
    This paper examines the hypothesis that supernovae of type I are produced by relatively 'young' single stars. The fact that SN I are not concentrated in spiral arms implies that their progenitors have M approximately less ...
  • 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 ...
  • Near infrared astronomy with moderate size telescopes 
    Rengarajan, T. N (Astronomical Society of India, 1998)
  • Near infrared coronal line emission in nova Herculis 1991 
    Chandrasekhar, T; Ashok, N. M; Ragland, S (Astronomical Society of India, 1993)
    Near infrared coronal line emission at 1.98 +/- 0.02 micrometers due to (Si VI) detected in the spectrum of Nova Herculis 1991 as early as about 17 days after optical maximum is reported. The coronal line observations ...
  • Near infrared high angular resolution observations of stars and circumstellar regions by the technique of lunar occultations 
    Chandrasekhar, T; Ashok, N. M; Sam Ragland (Astronomical Society of India, 1993)
    A program of high angular resolution observations of stars and their circumstellar regions using the technique of lunar occultations has been initiated at the Physical Research Laboratory, Ahmedabad. A liquid nitrogen ...
  • Near infrared observations of the solar atmosphere 
    Prasad, C. D (Astronomical Society of India, 1998)
    Due to the availability of the advanced two dimensional array detectors for detecting the near infrared (IR) wavelength, it has become possible to study new aspects of solar atmosphere during the recent times. The main ...
  • Near infrared occultation studies of late type stars and circumstellar regions from Gurushikhar observatory 
    Chandrasekhar, T (Astronomical Society of India, 1998)
  • Near Infrared Photometry of Some Stars 
    Kulkarni, P. V; Ananth, A. G; Sinvhal, S. D; Joshi, S. C (Astronomical Society of India, 1977-06)
  • Near infrared photometry of the young clusters NGC 1960, NGC 2453 and NGC 2384 
    Hasan, P (Astronomical Society of India, 2005-09)
    Infrared observations of young star clusters provide vital clues to the star formation process and evolution of stars. This brief report on my thesis gives a brief description of the observations and analysis of the young ...
  • Near infrared photometry of the young clusters NGC 1960, NGC 2453 and NGC 2384 
    Hasan, P (Astronomical Society of India, 2005-06)
    The present paper gives a brief description of the observations and analysis of the young star clusters NGC 1960, NGC 2453 and NGC 2384 observed in the near infrared bands at the Mt Abu Infrared Observatory, Gurushikhar ...
  • Near infrared photometry of the young open cluster NGC 1960 
    Hasan, P; Kilambi, G. C; Baliyan, K. S (Astronomical Society of India, 2002-09)
    We present the preliminary results of observations of NGC 1960 which was observed from the Mt Abu Infrared Observatory, using the NICMOS3 infrared array mounted on the 1.2 m Cassegrain focus telescope. The observations ...
  • Near Infrared Photometry of the Young Star Cluster NGC 2384 
    Hasan, P; Kilambi, G. C; Baliyan, K. S (Astronomical Society of India, 2003)
    This work involves near infrared photometry of the young cluster NGC 2384. Observations were taken at the Mt Abu Infrared Observatory using the NIC-MOS3 detector in February 2000. The distance to the cluster is obtained ...
  • Near infrared photometry of unassociated IRAS point sources in the zodiacal belt 
    Ashok, N. M; Chandrasekhar, T; Ragland, S; Watson, P. V (Astronomical Society of India, 1993)
    An observational program to generate a list of bright near infrared sources using IRAS Point Source Catalogue for further studies using lunar occultation technique has been initiated at Physical Research Laboratory, ...

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