Spectroscopy of Post-AGB Candidate IRAS 10215-5916

Abstract

IRAS 10215-5916 was classified as a post-AGB star and also as a massive red supergiant. It was also found to be a spectroscopic binary. In our high resolution spectra we found molecular features from a cool star of T-eff =3750K. We also see the spectral signature of a relatively hotter star of T-eff=7250K. We found that both the components of the binary system are metal poor. From the theoretical spectrum synthesis we obtained {[}C/H]=-0.2+/-0.4, {[}O/H]=-1.0+/-0.4 and {[}Fe/H]=2.0+/-0.5 for the hot component of the binary system. The enhanced carbon abundance and metal poor characteristics show that the hot component of the binary system could be a post-AGB star.