ECHA J0843.3-7905: Discovery of an 'old' classical T Tauri star in the η Chamaeleontis cluster

Warrick A. Lawson, Lisa A. Crause, Eric E. Mamajek, Eric D. Feigelson

Research output: Contribution to journalArticle

34 Scopus citations

Abstract

A limited-area survey of the η Chamaeleontis cluster has identified two new late-type members. The more significant of these is ECHA J0843.3-7905 (=IRAS F08450-7854), a slowly rotating (P = 12 d) M2 classical T Tauri (CTT) star with a spectrum dominated by Balmer emission. At a distance of 97 pc and cluster age of ≈9 Myr, the star is a nearby rare example of an 'old' CTT star and promises to be a rewarding laboratory for the study of disc structure and evolution in pre-main sequence (PMS) stars. The other new member is the M4 weak-lined T Tauri (WTT) star ECHA J0841.5-7853, which is the lowest mass (M ≈ 0.2 M) primary known in the cluster.

Original languageEnglish (US)
Pages (from-to)L29-L33
JournalMonthly Notices of the Royal Astronomical Society
Volume329
Issue number2
DOIs
StatePublished - Jan 11 2002

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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