Search for new T Tauri stars in the Cepheus-Cassiopeia region

K. Tachihara, R. Neuhäuser, M. Kun, Y. Fukui

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The Cepheus-Cassiopeia star-forming region has been searched for new T Tauri stars (TTSs) based on the ROSAT all sky survey (RASS). Optical spectroscopic observations were carried out toward 45 GSC stellar counterparts of RASS sources looking for the Li absorption line (6708 Å), a sign of youth. The detection of this line resulted in finding 11 to 16 new TTSs in this region. Using follow-up optical photometric observations and evolutionary models these Li-rich stars are revealed to be young low-mass stars. The most of the young stars are separated from the 13CO molecular clouds by ∼10 pc, significantly more than in Chamaeleon. A group of the new TTSs are isolated from the CO clouds and distributed inside the previously determined CO void. Possible formation scenarios including the interaction with the supernova shock for the isolated TTSs are discussed.

Original languageEnglish
Pages (from-to)919-928
Number of pages10
JournalAstronomy and Astrophysics
Volume437
Issue number3
DOIs
Publication statusPublished - Jul 2005

Keywords

  • ISM: clouds
  • ISM: molecules
  • Stars: formation
  • Stars: late-type
  • Stars: pre-main sequence
  • X-rays: stars

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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