Clumps in the Wolf-Rayet Wind of the Eclipsing Binary V444 Cygni

Details Clumps in the Wolf-Rayet Wind of the Eclipsing Binary V444 Cygni Clumps in the Wolf-Rayet Wind of the Eclipsing Binary V444 Cygni

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...202.0801m&link_type=abstract

American Astronomical Society Meeting 202, #08.01; Bulletin of the American Astronomical Society, Vol. 35, p.707

Astronomy and Astrophysics

Astronomy

1

Scientific paper

Among close, massive stellar systems comprising Wolf-Rayet and Main Sequence OB stars, the eclipsing binary V444 Cyg is a sort of Rosetta stone, being a universal `yardstick' in studies of mass-loss phenomena. During the past decade, it has become clear that massive hot stars drive inhomogeneous (clumpy) winds. Despite all previous efforts, the clumping rate for the WR component in V444 Cyg has never been properly evaluated. We address the issue by obtaining and analyzing an intense series of simultaneous, high-precision photometry of V444 Cyg in optical (0.503μ m) and near-IR (2.228μ m) bands. The latter leads to a much broader secondary eclipse (when the O-star is at inferior conjunction) than the former, depending on the degree of clumping.

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