SIMBAD references

2001A&A...372..952B - Astronomy and Astrophysics, volume 372, 952-962 (2001/6-4)

Mass loss rate determination of southern OB stars.


Abstract (from CDS):

A sample of OB stars (eleven Of, one O and one B supergiant) has been surveyed with the Australia Telescope Compact Array at 4.8 and 8.64GHz with a resolution of ∼2''-4''. Five stars were detected; three of them have negative spectral indices, consistent with non-thermal emission, and two have positive indices. The thermal radiation from HD 150135 and HD 163181 can be explained as coming from an optically thick ionized stellar wind. The non-thermal radiation from CD-47° 4551, HD 124314 and HD 150136 possibly comes from strong shocks in the wind itself and/or in the wind colliding region if the stars have a massive early-type companion. The percentage of non-thermal emitters among detected O stars has increased up to ∼50%. The Of star HD 124314 clearly shows flux density variations. Mass loss rates (or upper limits) were derived for all the observed stars and the results compared with non-radio measurements and theoretical predictions.

Abstract Copyright:

Journal keyword(s): stars: early-type - stars: mass loss - stars: winds, outflows - radio continuum: stars

Simbad objects: 13

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