Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000head....5.4207b&link_type=abstract
American Astronomical Society, HEAD Meeting #5, #42.07; Bulletin of the American Astronomical Society, Vol. 32, p.1256
Astronomy and Astrophysics
Astronomy
Scientific paper
We use our extensive set of ground-based optical and near-infrared data to identify visual counterparts to X-ray sources detected by CHANDRA in the Galactic giant HII region NGC 3603 and its central starburst cluster. A comparison of optical and near-infrared photometry with theoretical pre-main-sequence and main-sequence isochrones yields physical properties like the effective temperature or the mass of individual objects. The large area coverage of the ground-based data enables us to study radial gradients in the physical properties and to assign probabilities for cluster membership to individual sources. Optical and near-infrared emission-line images and spectra draw a dynamical picture of the interstellar medium surrounding the cluster, and point to regions which might exhibit diffuse X-ray emission from shock-heated gas.
Brandl Berhard
Brandner Wolfgang
Chu Y.-H. Y.-H.
Corcoran Michael F.
Grebel Eva Katharina
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