|
|||||
|
|
High resolution spectroscopy of the semi-regular variable LR Sco |
|
| Authors: | Sunetra Giridhar N Kameswara Rao David L Lambert |
| Institution: | (1) Indian Institute of Astrophysics, 560 034 Bangalore;(2) Department of Astronomy, University of Texas, 78712 Austin, TX, 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 |
| 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. |
| Keywords: | Semi-regular variables abundances infrared flux mass loss |
| 本文献已被 SpringerLink 等数据库收录！ | |