Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...441..261c&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 441, no. 1, p. 261-269
Astronomy and Astrophysics
Astronomy
22
Main Sequence Stars, Molecular Clouds, Pre-Main Sequence Stars, Star Formation, X Ray Stars, Astronomical Maps, Carbon Monoxide, Data Bases, Heao 2, Image Analysis, Sky Surveys (Astronomy)
Scientific paper
In order to discern whether the high-latitude molecular clouds are regions of ongoing star formation, we have used X-ray emission as a tracer of youthful stars. The entire Einstein database yields 18 images which overlap 10 of the clouds mapped partially or completely in the CO (1-0) transition, providing a total of approximately 6 deg squared of overlap. Five previously unidentified X-ray sources were detected: one has an optical counterpart which is a pre-main-sequence (PMS) star, and two have normal main-sequence stellar counterparts, while the other two are probably extragalactic sources. The PMS star is located in a high Galactic latitude Lynds dark cloud, so this result is not too suprising. The translucent clouds, though, have yet to reveal any evidence of star formation.
Caillault Jean-Pierre
Fryer Chris
Magnani Loris
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