Optical Spectroscopic Confirmation of OB Star Candidates in HII Regions (2)

Details Optical Spectroscopic Confirmation of OB Star Candidates in HII Regions (2) Optical Spectroscopic Confirmation of OB Star Candidates in HII Regions (2)

Feb 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008noao.prop..218t&link_type=abstract

NOAO Proposal ID #2008A-0218

Computer Science

Scientific paper

The number of OB stars (earlier than B2) is one of the most basic quantities to characterize massive star clusters. We studied several massive clusters using the Chandra X-ray Observatory and found 40--60 new OB star candidates in NGC6357, NGC6231, and NGC6334. The numbers are much larger than those previously known and their spatial distribution extends beyond the central OB associations. We propose a multi-object spectroscopy of these sources to confirm their nature. Using hydrogen and helium emission/absorption lines in the 4000-5000 A spectra and comparing with the OB spectral atlas in the literature, we can determine spectral sub-types and luminosity classes of these sources.

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