The Inhomogeneous Wind of the LBV Candidate CygOB2-No.12

Details The Inhomogeneous Wind of the LBV Candidate CygOB2-No.12 The Inhomogeneous Wind of the LBV Candidate CygOB2-No.12

2010-09-21

arxiv.org/abs/1009.3995v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

3 pages, 2 figures, IAU Symposium No.272 "Active OB stars: structure, evolution, mass loss and critical limits", 2010

Scientific paper

We present the results of high-resolution spectroscopy of the extremely luminous star CygOB2-No.12. We identified about 200 spectral features in the range 4552-7939 AA, including the interstellar NaI, KI lines and numerous very strong DIBs, along with the HeI, CII, and SiII lines. An MK spectral type we derived for the object is B4.5Ia+. Our analysis of the radial velocity data shows the presence of a gradient in the stellar atmosphere, caused by both atmospheric expansion and matter infall onto the star. The Halpha emission displays broad Thompson wings, a slightly blue-shifted PCyg type absorption component and a time-variable core absorption. We conclude that the wind is variable in time.

Affiliated with

Also associated with

No associations

Rating

The Inhomogeneous Wind of the LBV Candidate CygOB2-No.12 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Inhomogeneous Wind of the LBV Candidate CygOB2-No.12, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Inhomogeneous Wind of the LBV Candidate CygOB2-No.12 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-697161