Barbosa |
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Bastian |
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Blum |
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Brott |
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Caballero |
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Chen |
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Chita |
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Chu |
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Churchwell |
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Corcoran |
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Crowther |
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Damineli et al |
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Damineli |
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Fullerton |
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Gagne |
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Gallagher |
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Garcia |
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Garmany |
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Georgiev |
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Hamann |
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Hillier |
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Howarth |
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Indebetouw |
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Kobulnicky |
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Koenigsberger |
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Lang |
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Leitherer |
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Lennon |
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Levesque |
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Linder |
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Maeder |
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Mahy |
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Massa |
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Massey |
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McSwain |
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Moffat |
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Moises |
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Morrell |
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Morris |
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Naze |
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Nieva |
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Olsen |
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Oskinova |
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Owocki |
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Penny |
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Przybilla |
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Skinner |
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Smith |
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Soderberg |
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Teodoro |
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Testor |
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Townsley |
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Vacca |
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Vink |
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Wachter |
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Walborn |
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Wallerstein |
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Whelan |
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Williams |
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Willis |
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Wing |
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Wolff |
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van den Heuvel |
X-rays and Magnetic Fields in Young OB Stars
Marc Gagné
West Chester University, USA
David Cohen
Swarthmore College, USA
Stan Owocki
Bartol Research Institute, USA
Some hot stars in OB associations and star-forming regions show a wide range of unexpected phenomena at X-ray energies, including hard X-rays associated with very high-temperature shocks, long- and short-term variability, and narrow X-ray line profiles. In some cases, these are very massive spectroscopic binaries whose X-rays are most likely produced in a wind interaction zone. In other cases, the X-rays appear to be produced by magnetically confined wind shocks. We review the evidence for magnetic fields and wind shocks in O and very-early B stars stars like theta 1 Ori C, theta 2 Ori A, and tau Sco, and suggest approaches for diagnosing magnetically confined wind shocks in other stars.
