Search for young low-mass stars in a ROSAT selected sample south of the Taurus-Auriga molecular clouds

Bibcode
1997A&AS..124..449M
DOI
10.1051/aas:1997202
Magazzu, A.; Martin, E. L.; Sterzik, M. F.; Neuhauser, R.; Covino, E.; Alcala, J. M.
Bibliographical reference

A & A Supplement series, Vol. 124, September 1997, 449-467.

Advertised on:
9
1997
Number of authors
6
IAC number of authors
1
Citations
63
Refereed citations
51
Description
We present results of intermediate resolution spectroscopy of 131 optical counterparts to 115 ROSAT All-Sky Survey X-ray sources south of the Taurus-Auriga dark cloud complex. These objects have been selected as candidate young stars from a total of 1084 ROSAT sources in a ~300 square degree area. We identify 30 objects as low-mass PMS stars on the basis of the Li i, lambda 6708 Angstroms doublet in their spectrum, a signature of their young age. All these stars have a spectral type later than F7 and show spectral characteristics typical of weak-line and post-T Tauri stars. The presence of young objects several parsecs away from the regions of ongoing star formation is discussed in the light of the current models of T Tauri dispersal. Based on observations made with the Isaac Newton Telescope operated on the island of La Palma by the Royal Greenwich Observatory in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias and with the ESO 1.52m telescope on La Silla, Chile, operated by the European Southern Observatory. Tables 1,2,3,4 are also available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/Abstract.html
Type
Refereed

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