Modelling the polarimetric variability of hot stars
- Many hot stars exhibit stochastic polarimetric variability, thought to arise from clumping low in the wind. Here we investigate the wind properties required to reproduce this variability using analytic models, with particular emphasis on Luminous Blue Variables. We find that the winds must be highly structured, consisting of a large number of optically-thin clumps; while we find that the overall level of polarization should scale with mass-loss rate – consistent with observations of LBVs. The models also predict variability on very short timescales, which is supported by the results of a recent polarimetric monitoring campaign.
| Author details: | B. Davies, J. S. Vink, R. D. Oudmaijer |
|---|---|
| URN: | urn:nbn:de:kobv:517-opus-17939 |
| Publication type: | Conference Proceeding |
| Language: | English |
| Publication year: | 2007 |
| Publishing institution: | Universität Potsdam |
| Release date: | 2008/04/25 |
| RVK - Regensburg classification: | US 1999.07 |
| Organizational units: | Extern / Extern |
| DDC classification: | 5 Naturwissenschaften und Mathematik / 52 Astronomie / 520 Astronomie und zugeordnete Wissenschaften |
| Collection(s): | Universität Potsdam / Tagungsbände/Proceedings (nicht fortlaufend) / Clumping in hot-star winds: International Workshop, Potsdam, Germany, 18. - 22. June 2007 |
| Universität Potsdam / Tagungsbände/Proceedings (nicht fortlaufend) / Clumping in hot-star winds: International Workshop, Potsdam, Germany, 18. - 22. June 2007 / Posters | |
| License (German): |  Keine öffentliche Lizenz: Unter Urheberrechtsschutz |
| External remark: | The complete edition of the proceedings "Clumping in hot-star winds" is available: urn:nbn:de:kobv:517-opus-13981 |
