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High resolution spectroscopy of the semi-regular variable LR Sco

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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 whenM vis assumed to be – 4.5 for this star.

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Authors and Affiliations

  1. Indian Institute of Astrophysics, 560 034, Bangalore

    Sunetra Giridhar & N. Kameswara Rao

  2. Department of Astronomy, University of Texas, 78712, Austin, TX, USA

    David L. Lambert

  3. Cerro-Tololo-Inter-American-Observatory, National Optical Astronomical Observatories, Association of Universities for Research in Astronomy, Inc., National Science Foundation, La Serena, Chile

    David L. Lambert

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  1. Sunetra Giridhar
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  2. N. Kameswara Rao
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  3. David L. Lambert
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Giridhar, S., Rao, N.K. & Lambert, D.L. High resolution spectroscopy of the semi-regular variable LR Sco. J Astrophys Astron 13, 307–318 (1992). https://doi.org/10.1007/BF02702268

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  • DOI: https://doi.org/10.1007/BF02702268

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