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Browsing by Author "Apparao, K. M. V"

Browsing by Author "Apparao, K. M. V"

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  • No Need for Black Holes 
    Apparao, K. M. V (Astronomical Society of India, 1974-09)
  • Observation of an H-alpha outburst in the Be star HR 4123 
    Ghosh, K. K; Apparao, K. M. V; Tarafdar, S. P (American Astronomical Society, 1989-09)
    During routine monitoring of the Be star HR 4123 during the year 1987-1988, a burst of H-alpha emission was observed on May 11, 1987. The increase was observed on May 9 and lasted until June 7, peaking to an equivalent ...
  • Observations of BN and AN stars: New Be stars 
    Ghosh, K. K; Apparao, K. M. V; Pukalenthi, S (The European Southern Observatory, 1999-01)
    From a survey of spectra of Bn/An stars, we have detected seven new Be stars: HR 1056 (A0Vn), 1544 (A1Vn), 2191 (A0Vnn), 2300 (B8Vn), 3134 (B9.5 Vn), 3878 (B0.5 IIIn) and 4552 (B9IIIpSi). H_alpha profiles of these stars ...
  • Oscillating Transient X-Ray Source 
    Apparao, K. M. V (Astronomical Society of India, 1975-06)
  • 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 ...
  • Shocks in binary systems with high density winds or envelopes 
    Apparao, K. M. V (Astronomical Society of India, 1999)
  • Simultaneous infrared and H-alpha measurements of Be stars 
    Apparao, K. M. V; Tarafdar, S. P; Verma, R. P; Iyengar, K. V. K; Ghosh, K. K (Indian Academy of Sciences, 1993)
    The observed infrared excess in Be stars is usually interpreted as free-free and free-bound emission from a hot gas envelope around the Be star. This hot gas should also emit H-alpha line radiation. Earlier observations ...
  • Simultaneous Radio and Hα Observations of Be-Stars 
    Rengarajan, T. N; Tarafdar, S. P; Ghosh, K. K (European Southern Observatory, 1990-03)
    We have observed 18 Be stars in the radio continuum at 2cm wavelength with the VLA on 7th February 1987. We observed 12 of the stars the same night in the optical using an H alpha filter and the rest subsequently. No radio ...

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