Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996rftu.proc...71t&link_type=abstract
International Conference on X-ray Astronomy and Astrophysics: Röntgenstrahlung from the Universe, p. 71 - 72
Astronomy and Astrophysics
Astrophysics
Young Stars: X Rays, Young Stars: Classification, Young Stars: Star-Forming Regions
Scientific paper
The authors perform a maximum-likelihood classification of X-ray emitting objects situated in the Chamaeleon star forming region on the basis of the ROSAT All Sky Survey (RASS). The method is similar to the one applied to IR data by Prusti et al. (1992). The authors aim at partitioning the sources from the Chamaeleon complex into subgroups of low-mass young stellar objects, namely classical and weak-line T Tauri stars, and others. Multivariate Gaussian probability distributions are fitted to the distributions of usable X-ray colours obtained from the RASS. For each class, the parameters characterizing the corresponding likelihood distributions are estimated from training samples containing known objects which have been studied previously. The goal of this pilot study is to investigate how well different groups of objects can be discriminated in the RASS and whether this method can be successfully applied to the whole RASS.
Alcal{á} Juan M.
Tänzer G.
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