Overloaded and fractured winds
- We discuss the connection between wind overloading and discrete absorption components in P Cygni line profiles from O stars. Overloading can create horizontal plateaus in the radial wind speed that cause the extra absorption in the line profile. The upstream propagation speed of these velocity plateaus is analyzed. The second part of the paper deals with X-ray emission from O stars. X-ray line profiles observed with Chandra and XMM are often symmetric, contrary to what is expected for lines from a homogeneous wind. We discuss the influence on line symmetry of photon escape channels in a strongly clumped wind.
| Author details: | Achim FeldmeierORCiDGND, Lida OskinovaORCiDGND, Wolf-Rainer HamannORCiDGND, S. P. Owocki |
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| ISBN: | 1-58381-133-8 |
| Publication type: | Article |
| Language: | English |
| Year of first publication: | 2003 |
| Publication year: | 2003 |
| Release date: | 2017/03/24 |
| Source: | A massive star odyssey : from main sequence to supernova ; proceedings of the International Astronomical Union held in Costa Tequise / Hrsg.: Karl A. van der Hucht; Artemio Herrero; Cesar Esteban. - San Francisco : Astronomical Society of the Pacific, 2003. - ISBN: 1-58381-133-8. - S. 56 |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
| Institution name at the time of the publication: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik |
