SIMBAD references

1995A&A...295L...5N - Astronomy and Astrophysics, volume 295, L5-8 (1995/3-1)

Discovering new weak-line T Tauri stars in Taurus-Auriga with the ROSAT All-Sky Survey.

NEUHAEUSER R., STERZIK M.F., SCHMITT J.H.M.M., WICHMANN R. and KRAUTTER J.

Abstract (from CDS):

We analyse ROSAT All-Sky Survey (RASS) observations of a ∼103deg2 area including the Taurus-Auriga star forming region and its surroundings. The sample of low-mass pre-main sequence stars detected with the spatially complete flux-limited RASS consists mainly of weak-emission line T Tauri stars (WTTS). Two thirds of all RASS X-ray sources cannot be identified with known stellar or extragalactic counterparts. Based on the fraction of spectroscopically identified WTTS among a sample of previously unidentified RASS sources, we extrapolate a lower limit for the total number of WTTS in and around Taurus-Auriga: WTTS outnumber classical TTS by at least a factor of 8. A selection criterion for WTTS candidates is established based on the low-resolution X-ray spectra of identified WTTS. We achive a selection reliability of 54%.

Abstract Copyright:

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

Simbad objects: 6

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