Research Information System
New Horizons in Astronomy: Frank N. Bash Symposium 2009 (ISBN: 978-1-58381-744-5 ), Texas, United States Of America, 18 - 20 October 2009, vol.432, pp.254-258, (Full Text)
A detailed chemical composition analysis based on a high-resolution (R≍35,000) CCD spectrum is presented for a newly discovered post-AGB star in the globular cluster M79 for the first time. The elemental abundance results of M79 post-AGB star are found to be [C/Fe] ≍ -0.7, [O/Fe] = +1.4, [α-process/Fe] ≍ 0.5, and [s-process/Fe] ≍ -0.1. The surprising result is that the iron abundance of the star is apparently about 0.6 dex less than that of the cluster’s red giants as reported by published studies including a recent high-resolution spectroscopic analysis by Carretta and colleagues.