X-ray activities in a Young Open Cluster: Chandra Observations of NGC2516

Details X-ray activities in a Young Open Cluster: Chandra Observations of NGC2516 X-ray activities in a Young Open Cluster: Chandra Observations of NGC2516

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...195.4706t&link_type=abstract

American Astronomical Society, 195th AAS Meeting, #47.06; Bulletin of the American Astronomical Society, Vol. 31, p.1442

Astronomy and Astrophysics

Astronomy

Scientific paper

The young southern open cluster NGC 2516 was observed with the ACIS imaging array on the Chandra X-ray Observatory. The Chandra image has an order of magnitude better sensitivity than previously achieved with ROSAT and provide arcsecond positions. We detected about one hundred of X-ray sources, in which half of them are newly detected. 30 % of the sources we detected have no counterpart in optical or near infrared. We will report the source list and its optical/IR identifications, flux, hardness ratio, and time variability. Hardness ratios of most sources indicate temperatures higher than 1 keV, which suggests that X-ray activities in this cluster are rather resemble to those in the younger T Tauri phase than in the older phase like the Sun.

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