NGC 2516 X-ray sources (Dachs+, 1996)

Details NGC 2516 X-ray sources (Dachs+, 1996) NGC 2516 X-ray sources (Dachs+, 1996)

Apr 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996ycat..33120818d&link_type=abstract

VizieR On-line Data Catalog: J/A+A/312/818. Originally published in: 1996A&A...312..818D

Physics

X-Ray Sources, Clusters: Open

Scientific paper

The ROSAT PSPC detector was used to obtain a deep pointing with its center on the young open cluster NGC 2516 and total integration time of 9284 sec. Altogether 64 X-ray sources were detected showing strong concentration towards the optical cluster centre. This suggests that most of the sources are actually associated with NGC 2516. 42 of these sources could be identified with optical stars in the field of the cluster; after correction for a mean offset between optical and nominal ROSAT positions of about 13", optical star and X-ray source positions are found to agree, on the average, within about 9", while maximum observed positional differences amount to 27". X-ray sources identified with optical cluster stars include HR 3147 (=HD 66194; B2.5IVe), the visually brightest B star in the cluster, three close visual late B-type binaries (h 4027 A,B, h 4031 A,B, and I 1104 A,B) with projected separations ranging between about 4x1016cm and 6x1016cm, as well as several (six) chemically peculiar Bp/Ap(Si) and Ap(SrCrEu) stars.
(3 data files).

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