X-ray sources in regions of star formation. II. The pre-main-sequence G star HDE 283572
Journal Article
·
· Astrophys. J.; (United States)
This paper reports the detection of HDE 283572, a ninth-magnitude G star 8 arcmin south of RY Tau, as a bright X-ray source. The observations reveal this object to be a fairly massive (about 2 solar masses) pre-main-sequence star associated with the Taurus-Auriga star formation complex. It exhibits few of the characteristics of the classical T Tauri stars and is a good example of a naked T Tauri star. The star is a mid-G subgiant, of about three solar radii and rotates with a period of 1.5 d. The coronal and chromospheric surface fluxes are similar to those of the most active late type stars (excluding T Tauri stars). The X-ray and UV lines most likely arise in different atmospheric structures. Radiative losses are some 1000 times the quiet solar value and compare favorably with those of T Tauri stars. 49 references.
- Research Organization:
- Colorado Univ., Boulder; Joint Institute for Laboratory Astrophysics, Boulder, CO; Computer Sciences Corp., El Segundo, CA; Naval Observatory, Flagstaff, AZ
- OSTI ID:
- 6325109
- Journal Information:
- Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 314; ISSN ASJOA
- Country of Publication:
- United States
- Language:
- English
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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
ERUPTIVE VARIABLE STARS
MASS
MATHEMATICAL MODELS
SOLAR ATMOSPHERE
STAR EVOLUTION
STAR MODELS
STARS
STELLAR ATMOSPHERES
T TAURI STARS
VARIABLE STARS
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATMOSPHERES
CHROMOSPHERE
COSMIC RAY SOURCES
COSMIC X-RAY SOURCES
ERUPTIVE VARIABLE STARS
MASS
MATHEMATICAL MODELS
SOLAR ATMOSPHERE
STAR EVOLUTION
STAR MODELS
STARS
STELLAR ATMOSPHERES
T TAURI STARS
VARIABLE STARS