Astronomy and Astrophysics – Astronomy
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...200.7412e&link_type=abstract
American Astronomical Society, 200th AAS Meeting, #74.12; Bulletin of the American Astronomical Society, Vol. 34, p.771
Astronomy and Astrophysics
Astronomy
Scientific paper
The region around the η Car nebula contains several of the most massive stars known (O3 V stars). In addition it also contains objects which (probably) spell out an evolutionary progression from massive (O3 If) supergiants (HD 93129AB, Tr 16-244) to a WN6 Wolf-Rayet star (WR 25 = HD 93162), to η Car itself. We have used a Chandra ACIS-I X-ray image of the region surrounding η Car, including the clusters Tr 16 and Tr 14, to study the stars in this extremely young association. In particular, we discuss modeling of the X-ray spectra of a selection of these objects, together with hardness ratios. We also discuss optical photometry of the newly discovered population of cool star X-ray sources. Supported by funding from Chandra X-ray Center NASA Contract NAS8-39073
Krauss Miriam I.
Nichols Jonathan
Remage Evans Nancy
Schlegel Eric M.
Seward Frederick D.
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