Pulsation at the tip of the first giant branch?
Astrophysics
2016-08-16 v1
Abstract
The first results of our ongoing near-infrared (NIR) survey of the variable red giants in the Large Magellanic Cloud, using the Infrared Survey Facility (IRSF) and the SIRIUS infrared camera, are presented. Many very red stars were detected and found that most of them are variables. In the observed colour-magnitude diagram () and the stellar magnitude distribution, the tip of the first giant branch (TRGB), where helium burning in the core starts, is clearly seen. Apart from the genuine AGB variables, we found many variable stars at luminosities around the TRGB. From this result, we infer that a substantial fraction of them are RGB variables.
Keywords
Cite
@article{arxiv.astro-ph/0210498,
title = {Pulsation at the tip of the first giant branch?},
author = {Yoshifusa Ita and Toshihiko Tanabé and Noriyuki Matsunaga and Yasushi Nakajima and Chie Nagashima and Takahiro Nagayama and Daisuke Kato and Mikio Kurita and Tetsuya Nagata and Shuji Sato and Motohide Tamura and Hidehiko Nakaya and Yoshikazu Nakada},
journal= {arXiv preprint arXiv:astro-ph/0210498},
year = {2016}
}
Comments
5 pages, 3 figures; accepted for publication in MNRAS Letters