1995A&A...295L...5N

Query : 1995A&A...295L...5N

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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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1357 0
2 NAME Ori Region reg 05 35 17.30 -05 23 28.0           ~ 579 0
3 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1154 1
4 NAME Chamaeleon Region SFR 11 55 -78.0           ~ 806 0
5 NAME Lupus Complex SFR 16 03 -38.1           ~ 720 0
6 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1330 1

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