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      https://www.ias.ac.in/article/fulltext/joaa/014/03-04/0131-0134

    • Keywords

       

      Be-stars; H-alpha; infrared

    • Abstract

       

      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 had suggested that the infrared excess and Hα radiation were not consistent with models in which they arise from the same ionized region; however the observations were made at different times. We have made simultaneous observation of infrared and H-alpha line radiation. Our observations imply that either both these radiations cannot arise from the same hot gas or additional processes have to be invoked to account for the observed excess infrared radiation.

    • Author Affiliations

       

      Krishna M. V. Apparao1 S. P. Tarafdar1 R. P. Verma1 K. V. K. Iyengar2 K. K. Ghosh3

      1. Tata institute of Fundamental Research, Homi Bhabha Road, Bombay - 400005
      2. Indian Institute of Astrophysics, Bangalore - 560034
      3. Vainu Bappu Observatory, Kavalur, Alangayam, Tamilnadu - 75301
    • Dates

       
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