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      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/013/04/0307-0318

    • Keywords

       

      Semi-regular variables; abundances; infrared flux; mass loss

    • Abstract

       

      A detailed spectroscopic investigation of LR Sco which was earlier misclassified as R CrB star is made. Atmospheric parameters and elemental abundances are determined using detailed depth-dependent model atmospheres and line synthesis technique. Most of the elements show near solar abundances.

      The strength of circumstellar components seen in Na D lines are used to derive the mass loss rate. Another independent estimate of mass loss rate is made using the observed infrared flux from 1–100Μm. These two approaches lead to nearly the same value of mass loss rate whenMvis assumed to be – 4.5 for this star.

    • Author Affiliations

       

      Sunetra Giridhar1 N. Kameswara Rao1 David L. Lambert2 3

      1. Indian Institute of Astrophysics, Bangalore - 560 034
      2. Department of Astronomy, University of Texas, Austin, TX - 78712, USA
      3. Cerro-Tololo-Inter-American-Observatory, National Optical Astronomical Observatories, Association of Universities for Research in Astronomy, Inc., National Science Foundation, La Serena, Chile
    • Dates

       
  • Journal of Astrophysics and Astronomy | News

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