On the Wolf-Rayet counterpart to IC 10 X-1

Details On the Wolf-Rayet counterpart to IC 10 X-1 On the Wolf-Rayet counterpart to IC 10 X-1

Jan 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004a%26a...414l..45c&link_type=abstract

Astronomy and Astrophysics, v.414, p.L45-L48 (2004)

Astronomy and Astrophysics

Astrophysics

19

Galaxies: Individual: Ic 10, Stars: Wolf Rayet, X-Rays: Binaries

Scientific paper

Recent CHANDRA observations of the starburst galaxy IC 10 have resulted in an improved position for the bright (>1038 erg s-1) X-ray source IC 10 X-1. We discuss arguments in favour of the Wolf-Rayet star #17-A from Massey et al. and Crowther et al. being the optical counterpart; alternative possibilities are also considered. We discuss the properties of Massey et al. 17-A, finding it to be amongst the most luminous - and hence massive - WNE stars known and make comparisons with Cyg X-3. Finally we examine evolutionary constraints relating to the nature of the compact companion, finding that a putative neutron star companion would place stringent constraints on the minimum progenitor mass required to form a black hole in close binaries.

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