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      https://www.ias.ac.in/article/fulltext/joaa/006/02/0101-0112

    • Keywords

       

      stars, chemically peculiar; stars, individual; stars, eclipsing; ultraviolet astronomy; mass loss

    • Abstract

       

      The absolute magnitudeMv of the hydrogen deficient binary υ Sgr has been estimated as -4.8 ± 1.0 from the distribution of the interstellar reddening, polarization and interstellar lines of the surrounding stars. From the ANS observations obtained at the time of the secondary eclipse, it appears that the hotter secondary is surrounded by a disc with colours of a B8-B9 star. The λ 1550 CIv absorption line arising in the stellar wind does not show any change in strength during the secondary minimum. The upper limit to the mass-loss rate from the high temperature wind is estimated as ≤ 5 × 10-7 M⊙ yr-1 from the 2 cm and 6 cm radio observations.

    • Author Affiliations

       

      N. Kameswara Rao1 V. R. Venugopal2

      1. Indian Institute of Astrophysics, Bangalore - 560034
      2. Radio Astronomy Centre, Tata Institute of Fundamental Research, Post Box 8, Udhagamandalam - 643001
    • Dates

       
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