Publications of Astronomical Society of India: Recent submissions

  • Non-linear planar oscillation of a satellite in elliptical orbit under the influence of solar radiation pressure, 1 
    Bhatnagar, K. B; Khan, A; Saha, L. M (Astronomical Society of India, 1994)
    The non-linear oscillations of a satellite in an elliptic orbit around the earth under the influence of the solar radiation pressure have been studied in a series of papers 1 and 2. In paper 1, by using Melnikov's method ...
  • The infrared fluxes of early type stars 
    Shylaja, B. S (Astronomical Society of India, 1994)
    It is well known that the strong winds of the early type stars modify the fluxes in the infrared and radio wavelength regions. This aspect has been used here to explain the infrared fluxes by the method of 'curve of growth'. ...
  • External perturbations and rate of cometary capture 
    Sharma, S. D; Khanna, M (Astronomical Society of India, 1994)
    Capture of comets by Sun is attributed to some disturbing force field (Hills 1981; Yabushita 1971, 1972, 1979; Biermann et al. 1983 etc.). In the present exposition an attempt has been made to study the mechanism of the ...
  • General motion of N-rigid bodies 
    Bhatnagar, K. B; Saha, L. M (Astronomical Society of India, 1994)
    This is a review article on the general motion of N-rigid bodies. The development of analytical qualitative methods in the study of the rigid-body motion are presented in a systematic way starting from early researches of ...
  • Helioseismic detections of overshoot below the solar convection zone 
    Basu, S; Antia, H. M; Narasimha, D (Astronomical Society of India, 1993)
    It is generally accepted that there is no adequate theory to describe astrophysical convection. In particular, there is no agreement among different theories about the extent of overshoot from stellar convection zones. The ...
  • Critique of Fischer-Tropsch type reactions in the solar nebula 
    Ramadurai, S; Hoyle, F; Wickramasinghe, N. C (Astronomical Society of India, 1993)
    The paucity of kinetic data for the operation of Fischer-Tropsch Type (FTT) reactions, at the appropriate conditions for the primitive solar nebula, is highlighted. The observed isotopic abundances of D, C-13 and N-15 in ...
  • What is a quiet sun CaII K line profile? 
    Sivaraman, K. R; Gupta, S. S; Kariyappa, R (Astronomical Society of India, 1993)
    We have derived a mean disc averaged K line profile from observations at the Kodaikanal Solar Tower Telescope on days when sun was relatively very quiet during the years 1985-86. This mean profile would represent the K-line ...
  • Solar variability in the CaII K during solar cycles 21 and 22 
    Sivaraman, K. R; Gupta, S. S; Kariyappa, R; Aleem, P. S. M; Sundararaman, K (Astronomical Society of India, 1993)
    We have monitored the sun in the light of the CaII K line and obtained the disc integrated profiles for the years 1974-91. From these profiles we have estimated the variability of the sun as a star as seen in the various ...
  • Imaging polarimetry of comet Austin 
    Joshi, U. C; Chauhan, J. S; Deshpande, M. R; Sen, A. K; Bhatnagar, A. K (Astronomical Society of India, 1993)
    Comet Austin (1989c) was observed during April and May 1990 when its phase was between 106 deg and 110 deg. No unusual activity in the form of jet is seen in the polarization map. Polarization is low near the nucleus and ...
  • UBV photometry of comet Swift-Tuttle (1992t) 
    Padalia, T. D; Gupta, S. K; Srivastava, R. K; Chaubey, U. S (Astronomical Society of India, 1993)
    The comet Swift-Tuttle (1992t) was observed through UBV filters during twelve nights in December 1992. Magnitude variations of six circular zones from the center of the cometary head have been given. On the night of 17 ...
  • Radio observations of quadrantid meteor shower 
    Yellaiah, G; Lodanadham, B (Astronomical Society of India, 1993)
    The radio observations of quadrantid meteor shower obtained during the period 1983-88 have been analyzed. Diurnal as well as yearly variations in the quadrantid meteor shower activity have been studied.
  • Meteoric activity over a low latitude station, Hyderabad 
    Yellaiah, G; Lokanadham, B (Astronomical Society of India, 1993)
    he radio observations of sporadic meteors, carried out during the period 1983-88, have been studied.
  • Spectrophotometric observations of the comet Swift-Tuttle (1992t) 
    Sanwal, B. B; Rautela, B. S; Mahendra Singh; Srivastava, J. B (Astronomical Society of India, 1993)
    Periodic comet Swift-Tuttle (1992t) period 135 years was observed with 104 cm reflector of Uttar Pradesh State Observatory, Naini Tal, using OMA (Optical Multichannel Analyser) reticon array detector in the visible region ...
  • Neutrino induced nucleosynthesis 
    Ramadurai, S; Schramm, D. N (Astronomical Society of India, 1993)
    The detection of neutrinos from SN1987a has revived the interest in neutrino induced nucleosynthesis. In this work various results on the neutrino produced abundances of several isotopes are summarized and compared with ...
  • A search for TeV photons from 4U0115 + 63 
    Rannot, R. C; Bhat, C. L; Senecha, V. K; Sapru, M. L; Tickoo, A. K; Kaul, R. K; Rawat, H. S (Astronomical Society of India, 1993)
    An analysis of 47 hours of data collected by the Gulmarg gamma-ray telescope during the period 1989 September 27-October 30, indicates absence of a statistically significant steady, persistent-pulsed or episodic pulsed ...
  • 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 ...
  • Detached cold dust shells around yellow variable supergiants TW Aql, AI CMi, V 925 SCO and related stars 
    Parthasarathy, M; Reddy, B. E (Astronomical Society of India, 1993)
    TW Azl, AI CMi, V 924 Sco, ST Pup, AX Sgr, AD Aql, V1027 Cyg are yellow variable supergiants. We find these stars to be far-infrared (IRAS) sources with flux maximum around 25 micrometers. Analysis of the IRAS fluxes shows ...
  • Terrestrial effects of PSR 0950 + 08 (Paper 2) 
    Vats, Hari Om; Chandra, H; Deshpande, M. R; Janardhan, P; Vyas, G. D (Astronomical Society of India, 1993)
    This article presents indirect evidence that on July 29, 1992 PSR 0950 + 08 emitted a burst of X-ray emissions along with the enhanced radio pulses. This indirect evidence is seen in the form of excess absorption of HF ...
  • Observations of PSR 0950 + 08 at 103 MHz 
    Deshpande, M. R; Vats, Hari Om; Janardhan, P; Bobra, A. D (Astronomical Society of India, 1993)
    n this article we report the possible cause of an enormously large enhancement (burst) in the ratio flux of PSR 0950 + 08. The burst was observed by two radio telescopes at Rajkot and Thaltej separated by 20 km. Simple ...
  • Post-AGB A-F supergiant stars 
    Parthasarathy, M; Reddy, B. E (Astronomical Society of India, 1993)
    We have searched the IRAS Polar Stratospheric Clouds (PSC) for dust shells around A-F supergiant stars similar to the high galactic latitude A-F supergiants with circumstellar dust shells. We have found that HD 114855 ...

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