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PROBING WOLF–RAYET WINDS: CHANDRA/HETG X-RAY SPECTRA OF WR 6

Author(s)
Huenemoerder, David P.; Gayley, K. G.; Hamann, W.-R.; Ignace, R.; Nichols, Joy S.; Oskinova, Lidia M.; Pollock, A. M. T.; Schulz, N. S.; Shenar, T.; ... Show more Show less
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Abstract
With a deep Chandra/HETGS exposure of WR 6, we have resolved emission lines whose profiles show that the X-rays originate from a uniformly expanding spherical wind of high X-ray-continuum optical depth. The presence of strong helium-like forbidden lines places the source of X-ray emission at tens to hundreds of stellar radii from the photosphere. Variability was present in X-rays and simultaneous optical photometry, but neither were correlated with the known period of the system or with each other. An enhanced abundance of sodium revealed nuclear-processed material, a quantity related to the evolutionary state of the star. The characterization of the extent and nature of the hot plasma in WR 6 will help to pave the way to a more fundamental theoretical understanding of the winds and evolution of massive stars.
Date issued
2015-12
URI
http://hdl.handle.net/1721.1/101667
Department
MIT Kavli Institute for Astrophysics and Space Research
Journal
The Astrophysical Journal
Publisher
IOP Publishing
Citation
Huenemoerder, David P., K. G. Gayley, W.-R. Hamann, R. Ignace, J. S. Nichols, L. Oskinova, A. M. T. Pollock, N. S. Schulz, and T. Shenar. “PROBING WOLF–RAYET WINDS: CHANDRA/HETG X-RAY SPECTRA OF WR 6.” The Astrophysical Journal 815, no. 1 (December 3, 2015): 29. © 2015 The American Astronomical Society
Version: Final published version
ISSN
1538-4357
0004-637X

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