A survey of He I 1.0830-μm line profile variability in Wolf-Rayet colliding wind systems.

Details A survey of He I 1.0830-μm line profile variability in Wolf-Rayet colliding wind systems. A survey of He I 1.0830-μm line profile variability in Wolf-Rayet colliding wind systems.

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...20925420h&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #254.20; Bulletin of the American Astronomical Society,

Astronomy and Astrophysics

Astronomy

Scientific paper

For a few years now, NIRSPEC on the Keck II telescope has been used to obtain phase-resolved, moderate resolution spectroscopy near 1 micron of colliding wind WR+O binaries. The He I 1.0830-μm line in this region presents remarkable profile variability which is interpreted as arising from the wind collisions. Preliminary modeling of the spectra is presented and discussed. The ubiquity of the profile variations, amongst the systems observed, implies that this line offers a near IR counterpart to C III λ5696 in terms of sensitivity to colliding winds. This facilitates work on heavily reddened systems, and even more importantly, offers a tool with which to study both WN and WC type Wolf-Rayet stars.

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