Revealing the Origin of Hard X-rays in the Remarkable O4-O4 Binary Star System in M17: GTO component

Details Revealing the Origin of Hard X-rays in the Remarkable O4-O4 Binary Star System in M17: GTO component Revealing the Origin of Hard X-rays in the Remarkable O4-O4 Binary Star System in M17: GTO component

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008cxo..prop.2706g&link_type=abstract

Chandra proposal ID #10200070

Computer Science

Scientific paper

The central massive stars in the closest Galactic Giant HII Region M17 are a pair of O4 stars separated by 1.8('') . A Chandra Large Project has revealed that both of these O4 stars are extraordinary X-ray sources, showing hard spectra and rapid variability typical of the luminous blue variable eta Carinae but almost unknown for normal O stars. Using He-like lines resolved by the HETG, we will diagnose whether this remarkable X-ray emission comes from magnetically-channeled wind shocks in single stars or from colliding-wind binaries; if the latter is the case, this pair of early O stars is really a system of four massive stars and constrains models of massive star formation. This is the GTO component of a combined GO/GTO observation (GO PI Marc Gagné).

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