The peculiar Of?p stars HD 108 and HD 191612
In: Massive Stars and High-Energy Emission in OB Associations, 31-34 (2005-11-01, 2005
Online
Konferenz
Zugriff:
The Of?p spectral category was introduced by Walborn in 1972 to describe peculiar stars which possess intense emission lines of C III 4647,4650,4651. Recently, two of them, HD 108 and HD 191612, were found to display spectacular line profile variations in the visible domain: these stars apparently alternate between two different spectral states (O6-O8). To discover the origin of this intriguing behaviour, a multiwavelength campaign was undertaken. In this context, the analysis of the X-ray emission is especially important since it provides crucial information for constraining the nature of these peculiar objects and testing conflicting models. We are therefore carrying out high-quality XMM-Newton observations of these stars and we present the results of the data obtained up to now.
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The peculiar Of?p stars HD 108 and HD 191612
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Autor/in / Beteiligte Person: | Nazé, Yaël ; Rauw, Grégor ; Walborn, N. R. ; Howarth, I. D. |
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Zeitschrift: | Massive Stars and High-Energy Emission in OB Associations, 31-34 (2005-11-01, 2005 |
Veröffentlichung: | 2005 |
Medientyp: | Konferenz |
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