Can Post T Tauri Stars Be Found? Yes!

Details Can Post T Tauri Stars Be Found? Yes! Can Post T Tauri Stars Be Found? Yes!

2001-05-02

arxiv.org/abs/astro-ph/0105031v1

Astronomy and Astrophysics

Astrophysics

6 pages; to appear in "Young Stars Near Earth: Progress and Prospects", ASP Conf. series. Also available at http://hven.swar

Scientific paper

I review the observational challenges of finding post T Tauri stars (PTTS), defined here as low-mass, pre-main-sequence stars with ages of 10^7-10^8 yr. Such stars are difficult to find because they are less active than younger T Tauri stars, and they may not be associated with molecular gas. They are useful for studying the evolution of circumstellar disks and stellar activity between the 10^6-yr ages of nearby star-forming regions and the main sequence. However, care must be taken in the search process so that the selection criteria used to locate such stars do not bias the sample used for subsequent evolutionary studies.

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