A study of the Chamaeleon star forming region from the ROSAT all-sky survey. I. X-ray observations and optical identifications.

Details A study of the Chamaeleon star forming region from the ROSAT all-sky survey. I. X-ray observations and optical identifications. A study of the Chamaeleon star forming region from the ROSAT all-sky survey. I. X-ray observations and optical identifications.

Nov 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26as..114..109a&link_type=abstract

Astronomy and Astrophysics Supplement, v.114, p.109

Astronomy and Astrophysics

Astrophysics

145

X-Ray: Stars, Stars: Pre-Main-Sequence, Ism: Chamaeleon Clouds, Surveys

Scientific paper

We present the observations of the ROSAT all-sky survey (RASS) in the direction of the Chamaeleon cloud complex, as well as the spectroscopic identifications of the detected X-ray sources. The main purpose of this identification program was the search for low mass pre-main sequence stars. Sixteen previously known PMS stars were detected with high confidence by ROSAT. Eight are classical T Tauri stars and eight are weak-line T Tauri stars, Seventy-seven new weak-line T Tauri stars were identified on the basis of the presence of strong Li λ 6707 absorption, spectral type later than F0 and chromospheric emission. We give coordinates and count rates of the X-ray sources, and present optical spectra and finding charts for the sources identified optically as new pre-main sequence stars. Optical UBV(RI)_c_ and near-infrared JHKLM photometry for this sample of stars is also provided. In addition, 6 new dKe-dMe candidates are found among the RASS sources.

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