Remarkable yellow supergiant variable TmzV429

Taichi Kato; Kesao Takamizawa

Remarkable yellow supergiant variable TmzV429

Astrophysics 2007-05-23 v1

Authors: Taichi Kato , Kesao Takamizawa

Abstract

We discovered that GSC 6554.559 is a previously unknown variable star, and named as TmzV429. We noticed that TmzV429 is identified with the IRAS-selected proto-planetary nebula (PPN), IRAS 08005-2356, which is undergoing a vigorous mass-loss episode. The analysis of photometric data suggests that TmzV429 a short-period pulsator, resembling a high-latitude yellow supergiant variable. TmzV429 is considered to be one of rare objects caught in the rapid course of PPN evolution, and shows one of the most striking mass-loss features among variable stars in the PPN stage. Since its evolutionary time-scale is estimated to be quite short (~150 yrs), future observations of pulsations of TmzV429 is expected to provide an excellent opportunity to study the stellar evolution in real time.

Keywords

stellar outbursts and variable stars

Cite

@article{arxiv.astro-ph/0112238,
  title  = {Remarkable yellow supergiant variable TmzV429},
  author = {Taichi Kato and Kesao Takamizawa},
  journal= {arXiv preprint arXiv:astro-ph/0112238},
  year   = {2007}
}

Comments

3 pages, 2 figures; to appear in VSOLJ Variable Star Bulletin

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