| Issue |
Astron. Astrophys. Suppl. Ser.
Volume 145, Number 2, August 2000
|
|
|---|---|---|
| Page(s) | 187 - 195 | |
| DOI | https://doi.org/10.1051/aas:2000350 | |
| Published online | 15 August 2000 | |
Photometric observations of weak-line T Tauri stars *,**
II. 
in Taurus-Auriga, Orion and Scorpius
1
Instituto de Astronomía, Carretera Tijuana Ensenada km 107, Ensenada B.C., CP. 22860, México
2
Osservatorio Astronomico di Capodimonte, Via Moiariello 16, I-80131 Napoli, Italy
Send offprint request to: e-mail: chavarri@astrosen.unam.mx
Received:
25
March
1999
Accepted:
11
April
2000
We present uvby-β photometry of 116 X-ray flux-selected active stars in the directions of the Orion (40), Taurus-Auriga (58) and Scorpius OB2-2 (18) star forming regions. Additionally, we give near IR JHK photometry of 20 active stars in the Taurus-Auriga direction. The program stars were selected from the ROSAT All Sky Survey and EINSTEIN X-ray surveys and are spectroscopically confirmed weak-line T Tauri stars and weak-line T Tauri star candidates. The photometry confirms the young nature of the program stars and also indicates that a significant fraction of the sample could be foreground objects. The data given here probably represent the largest homogeneous uvby-β photometric sample of new WTTS and WTTS candidates. Many objects in the sample are observed photometrically for the first time.
Key words: stars: activity / stars: evolution / stars: pre-main sequence
© European Southern Observatory (ESO), 2000