Photometric observations of weak-line T Tauri stars . II. WTTS in Taurus-Auriga, Orion and Scorpius OB2-2

Details Photometric observations of weak-line T Tauri stars . II. WTTS in Taurus-Auriga, Orion and Scorpius OB2-2 Photometric observations of weak-line T Tauri stars . II. WTTS in Taurus-Auriga, Orion and Scorpius OB2-2

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26as..145..187c&link_type=abstract

Astronomy and Astrophysics Supplement, v.145, p.187-195

Astronomy and Astrophysics

Astrophysics

8

Stars: Activity, Stars: Evolution, Stars: Pre-Main Sequence

Scientific paper

We present uvby-$beta a photometry of 116 X-ray flux-selected active stars in the directions of the Orion (40), Taurus-Auriga (58) and Scorpius OB2-2 (18) star forming regions. Additionally, we give near IR JHK photometry of 20 active stars in the Taurus-Auriga direction. The program stars were selected from the R_\odotsat All Sky Survey and EINSTEIN X-ray surveys and are spectroscopically confirmed weak-line T Tauri stars and weak-line T Tauri star candidates. The photometry confirms the young nature of the program stars and also indicates that a significant fraction of the sample could be foreground objects. The data given here probably represent the largest homogeneous uvby-beta a$ photometric sample of new WTTS and WTTS candidates. Many objects in the sample are observed photometrically for the first time. Based on observations collected at the Observatorio Astronómico Nacional in Sierra San Pedro Mártir, Baja California, México. Tables 1-4 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

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