Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993psu..rept.....f&link_type=abstract
Final Report Pennsylvania State Univ., University Park. Dept. of Astronomy and Astrophysics.
Astronomy and Astrophysics
Astrophysics
Ophiuchi Clouds, Pre-Main Sequence Stars, Stellar Luminosity, T Tauri Stars, X Ray Astronomy, X Ray Imagery, X Ray Sources, Astrophysics, B Stars, Photoionization, Proportional Counters, Rosat Mission, Signal To Noise Ratios, Star Formation
Scientific paper
This grant funds two closely related studies of young stars under the ROSAT Guest Observer Program. A major paper on ROSAT discovery of X-ray emitting young stars in the Chamaeleon star forming cloud was published in the Astrophysical Journal. Two soft X-ray images of the Chamaeleon I star forming cloud obtained with the ROSAT Position Sensitive Proportional Counter are presented. Seventy reliable, and 19 possible additional, X-ray sources are found. Most are confirmed to be new weak T Tauri stars. A study of X-ray emitting stars in a deep ROSAT image of the rho Ophiuchi star forming cloud cores has been completed, and is being submitted for publication in the Astrophysical Journal. A list of X-ray sources, fluxes, signal-to-noise ratios and boresight-corrected positions has been compiled, and optical identification down to 22m are obtained. Of the 55 reliable ROSAT sources, virtually all are associated with embedded infrared-detected T Tauri stars. T Tauri X-rays may provide a crucial link in the photoionization self-regulation of star formation in the galaxy.
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