新发现的M79后渐近巨星支恒星的惊人金属丰度
太阳与恒星天体物理
2016-09-08 v1
摘要
基于高分辨率(R=35,000)CCD光谱，首次对球状星团M79中新发现的一颗后渐近巨星支恒星进行了详细的化学成分分析。M79后渐近巨星支恒星的元素丰度结果为[C/Fe]=-0.7，[O/Fe]=+1.4，[α-过程/Fe]=0.5，[s-过程/Fe]=-0.1。令人惊讶的结果是，该恒星的铁丰度明显比该星团红巨星的低约0.6 dex，这与已发表的研究（包括Carretta及其同事最近的高分辨率光谱分析）所报告的结果不符。
引用
@article{arxiv.0910.5567,
title = {Surprising Metallicity of a Newly Discovered M79 Post-AGB Star},
author = {Timur Sahin and David L. Lambert},
journal= {arXiv preprint arXiv:0910.5567},
year = {2016}
}
备注
To appear in Proceedings of the Bash Symposium 2009 "New Horizons in Astronomy", 18-20 Oct. 2009; eds. L. Stanford, L. Hao, Y. Mao, J. Green; ASP conference series