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Spectropolarimetry and modeling of WR156

Published online by Cambridge University Press:  23 January 2015

Olga Maryeva
Olga Maryeva*
Affiliation:
Special Astrophysical Observatory of the Russian Academy of Sciences email: [email protected]
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Abstract

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For the first time spectropolarimetric observations of Wolf-Rayet star WR156 (WN8h) were conducted. Medium resolution spectropolarimetric data in the range of 3500-7200 ÅÅ were obtained at Russian 6-m telescope of Special Astrophysical Observatory (SAO RAS). These data show that the light from the star is significantly polarized, with the degree of polarization P=1.38±0.06%, and the position angle Θ=77.4°±1.2°. This polarization, most probably, has an interstellar origin, as its magnitude and orientation are similar to the ones of field stars. Also, we present results of numerical modeling of WR156 atmosphere performed using cmfgen code. According to it, WR156 is the richest hydrogen Wolf-Rayet star of WN8 type in the Galaxy.

Keywords

stars : individual : WR156stars : Wolf-Rayettechniques : polarimetric
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Issue S307: New windows on massive stars: asteroseismology, interferometry, and spectropolarimetry , June 2014 , pp. 387 - 388
Copyright
Copyright © International Astronomical Union 2015 

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