| Issue |
A&A
Volume 569, September 2014
|
|
|---|---|---|
| Article Number | A70 | |
| Number of page(s) | 6 | |
| Section | Stellar atmospheres | |
| DOI | https://doi.org/10.1051/0004-6361/201424416 | |
| Published online | 25 September 2014 | |
Research Note
Modulated X-ray emission of the magnetic O8.5V-star Tr16-22⋆,⋆⋆
1
Groupe d’Astrophysique des Hautes Énergies, Institut d’Astrophysique et de
Géophysique, Université de Liège,
17 allée du 6 Août, B5c,
4000
Sart Tilman,
Belgium
e-mail:
naze@astro.ulg.ac.be
2
Department of Physics, Royal Military College of Canada, PO Box 17000, Station Forces, Kingston,
ON
K7K 4B4,
Canada
3
Department of Physics & Astronomy, University of
Delaware, Bartol Research Institute, Newark, DE
19716,
USA
4
Dept. of Physics & Space Sciences, Florida Institute
of Technology, 32901
Melbourne,
Austria
Received:
17
June
2014
Accepted:
25
August
2014
Using an extensive X-ray dataset, we analyzed the X-ray emission of the massive O-star Tr16-22, which was recently found to be magnetic. Its bright X-ray emission is found to be modulated with a ~54 d period. This timescale should represent the rotational timescale of the star, as it does for other magnetic massive stars. In parallel, new spectropolarimetric data confirm the published magnetic detection.
Key words: stars: early-type / X-rays: stars / stars: individual: Tr16-22 / stars: magnetic field
Based on observations collected with the ESA science mission XMM-Newton, Chandra, and ESO-FORS2 instrument.
Tables 1–3 are available in electronic form at http://www.aanda.org
© ESO, 2014
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