Soft X-ray observations of pre-main-sequence stars in the Chamaeleon dark cloud

Journal Article · Wed Mar 01 04:00:00 EST 1989 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/167196· OSTI ID:6225289

Feigelson, E D; Kriss, G A

X-ray observations of the Chamaeleon I cloud, a star-forming region, are reported. A total of 22 distinct X-ray sources, most associated with previously identified premain sequence stars, are found. The spatial distributions and HR diagrams of the stars are very similar, suggesting that they are coeval. Luminosity functions suggest that the stars have an average X-ray luminosity (Lx) several times that of the Pleiades dwarfs. The value of Lx is significantly correlated with optical magnitude, though no relation between X-ray emission and any photometric or emission line characteristic is present. It is suggested that a Skumanich-type power-law relation may be present over the entire range of stellar ages between 10 to the 6th and 10 to the 10th yr. 54 refs.

• Research Organization: Pennsylvania State Univ., University Park (USA). Davey Lab.; Pennsylvania State University, University Park; Johns Hopkins University, Baltimore, MD
• OSTI ID: 6225289
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 338; 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
AGE ESTIMATION
BALMER LINES
COSMIC RAY SOURCES
COSMIC X-RAY SOURCES
DISTRIBUTION
ELECTROMAGNETIC RADIATION
EMISSION SPECTRA
IONIZING RADIATIONS
LUMINOSITY
MOLECULES
NEBULAE
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
PROTOSTARS
RADIATIONS
SOFT X RADIATION
SPATIAL DISTRIBUTION
SPECTRA
SPECTROSCOPY
STAR EVOLUTION
X RADIATION