SIMBAD references

1997A&A...320..185W - Astronomy and Astrophysics, volume 320, 185-195 (1997/4-1)

The T Tauri star population in the Lupus star forming region.

WICHMANN R., KRAUTTER J., COVINO E., ALCALA J.M., NEUHAEUSER R. and SCHMITT J.H.M.M.

Abstract (from CDS):

In a recent study, some 130 new weak-line T Tauri stars (WTTS) have been discovered in the Lupus star forming region (SFR). Some of these stars are seen projected onto regions of high obscuration, while others are located far from the Lupus dark clouds. In this paper we present photometric observations of a large sample of these WTTS. We estimate effective temperatures and luminosities for the stars observed, and derive masses and ages by comparison with theoretical evolutionary tracks. The mean age of WTTS seen in projection against the dark clouds is found to be lower than the mean age of WTTS discovered far from regions of high obscuration, and yet higher than the mean age of the classical T Tauri stars (CTTS) in Lupus. Moreover, while the CTTS in Lupus show an unusual predominance of very low-mass stars, the WTTS population in Lupus contains many stars with comparatively higher masses. Correlations between the X-ray emission and other stellar parameters, like bolometric luminosity, radius, mass, and age, are studied, and the results are discussed.

Abstract Copyright:

Journal keyword(s): stars: formation - stars: late-type - stars: pre-main sequence - X-rays: stars

VizieR on-line data: <Available at CDS (J/A+A/320/185): table6 table7>

Simbad objects: 96

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