Soft X-ray observations of pre-main-sequence stars in the Chamaeleon dark cloud
Creators
- 1. Johns Hopkins University, Baltimore, MD
- 2. Pennsylvania State University, University Park
Description
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
Additional details
Publishing Information
- Journal Title
- Astrophysical Journal
- Journal Volume
- 338
- Series
- Astrophys. J.
- Journal Page Range
- 262-276
- ISSN
- 0004-637X
- CODEN
- ASJOA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 20054423
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- AGE ESTIMATION; BALMER LINES; COSMIC X-RAY SOURCES; EMISSION SPECTRA; LUMINOSITY; MOLECULES; NEBULAE; PROTOSTARS; SOFT X RADIATION; SPATIAL DISTRIBUTION; SPECTROSCOPY; STAR EVOLUTION
- Descriptors DEC
- COSMIC RAY SOURCES; DISTRIBUTION; ELECTROMAGNETIC RADIATION; IONIZING RADIATIONS; OPTICAL PROPERTIES; PHYSICAL PROPERTIES; RADIATIONS; SPECTRA; X RADIATION