HRI observations of PMS stars in NGC 2264 (Flaccomio+, 2000)

Details HRI observations of PMS stars in NGC 2264 (Flaccomio+, 2000) HRI observations of PMS stars in NGC 2264 (Flaccomio+, 2000)

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002ycat..33550651f&link_type=abstract

VizieR On-line Data Catalog: J/A+A/355/651. Originally published in: 2000A&A...355..651F

Other

Clusters: Open, Stars: Pre-Main Sequence, X-Ray Sources

Scientific paper

We analyze six ROSAT HRI observations pointed toward the Star Forming Region (SFR) NGC 2264. Three are pointed to the southern star formation core, the other three about 20' to the north. We detect 169 X-ray sources, ~95% of which are likely to be Pre Main Sequence (PMS) stars, significantly enlarging the known population of the SFR in the area covered by the observations. Using published BVRI photometry we place the X-ray sources with well defined optical counterparts on the HRI diagram and estimate their masses and ages. Our comparison of the mass function and age distribution of the X-ray sources with results previously obtained for NGC 2264, demonstrates that deep X-ray observations provide, at least in this case, a very efficient method of selecting SFR members and does not introduce stronger biases than other methods.
(2 data files).

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