X-ray sources in regions of star formation. I. The naked T Tauri stars

Journal Article · Tue Jul 01 04:00:00 EDT 1986 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/164367· OSTI ID:6932106

Walter, F M

Einstein X-ray observations of regions of active star formation in Taurus, Ophiuchus, and Corona Australis show a greatly enhanced surface density of stellar X-ray sources over that seen in other parts of the sky. Many of the X-ray sources are identified with low-mass, pre-main-sequence stars which are not classical T Tauri stars. The X-ray, photometric, and spectroscopic data for these stars are discussed. Seven early K stars in Oph and CrA are likely to be 1-solar-mass post-T Tauri stars with ages of 10-million yr. The late K stars in Taurus are not post-T Tauri, but naked T Tauri stars, which are coeval with the T Tauri stars, differing mainly in the lack of a circumstellar envelope. 72 references.

• Research Organization: Colorado Univ., Boulder
• OSTI ID: 6932106
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 306; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATMOSPHERES
CHROMOSPHERE
COSMIC RAY SOURCES
COSMIC X-RAY SOURCES
DENSITY
ERUPTIVE VARIABLE STARS
MAIN SEQUENCE STARS
PHOTOMETRY
PHYSICAL PROPERTIES
SOLAR ATMOSPHERE
STAR EVOLUTION
STARS
T TAURI STARS
VARIABLE STARS