NOAO >   Observing Info >   Approved Programs >   2012B-0236

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Proposal Information for 2012B-0236


PI: Joanne Bibby, American Museum of Natural History, jbibby@amnh.org
Address: 79th Street @ Central Park West, New York, NY, 10024, US

CoI: Simon Clark, The Open University
CoI: Paul Crowther, University of Sheffield
CoI: Ben Ritchie, The Open University
CoI: Olivier Schnurr, Astrophysikalisches Institut Potsdam

Title: A WR+BH X-Ray Binary in M74?

Abstract: From narrow-band imaging we have identified a likely Wolf-Rayet star coincident with a Chandra X-ray source CXO J013630+154855 in M74. Given the magnitude and luminosity of the star and x-ray source we are confident that this is a Wolf-Rayet+Black Hole accreting binary system. We propose multi-epoch GMOS spectroscopic observations of the mass donor to (a) classify and provide a quantitative analysis of the mass donor, (b) confirm that radial velocity shifts are present, (c) determine lower limits to the mass of the compact object and hence confirm its nature, and (d) investigate the evolutionary channel that yielded the binary.


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NOAO >   Observing Info >   Approved Programs >   2012B-0236

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