High resolution spectroscopy of the semi-regular variable LR SCO

Details High resolution spectroscopy of the semi-regular variable LR SCO High resolution spectroscopy of the semi-regular variable LR SCO

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992japa...13..307g&link_type=abstract

Journal of Astrophysics and Astronomy (ISSN 0250-6335), vol. 13, no. 4, p. 307-318.

Astronomy and Astrophysics

Astrophysics

6

Astronomical Spectroscopy, Semiregular Variable Stars, Abundance, Metallicity, Stellar Atmospheres, Stellar Envelopes, Stellar Mass Ejection, Stellar Spectra

Scientific paper

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 1-100 microns. These two approaches lead to nearly the same value of mass loss rate when M(v) is assumed to be -4.5 for this star.

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