Resolving the Massive OB Core of the Young Cluster NGC 6193

Details Resolving the Massive OB Core of the Young Cluster NGC 6193 Resolving the Massive OB Core of the Young Cluster NGC 6193

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop..771s&link_type=abstract

Chandra Proposal ID #03200678

Physics

Chandra Proposal Id #03200678

Scientific paper

Located at the center of the young open cluster NGC 6193 are two nearly identical O stars HD 150135 (O6V) and HD 150136 (O5 III-V), separated by only 10 arc-secs. This pair was detected as a bright variable X-ray source by ROSAT, but was not resolved. We propose to use ACIS-S/HETG to resolve the pair and determine the origin of the X-ray emission. The HETG spectrum will allow us to discriminate between X-rays from radiative shocks in the winds of one or both O stars and colliding wind shock emission in HD 150136, which is known to be a O + O spectroscopic binary. The sensitive ACIS-S image will provide the first accurate X-ray census of the massive OB concentration at the center of NGC 6193.

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