First detection of a magnetic field in the fast rotating runaway Oe star ζ Ophiuchi

被引：22

作者：

Hubrig, S. ^{[1
]}

Oskinova, L. M. ^{[2
]}

Schoeller, M. ^{[3
]}

机构：

[1] Astrophys Inst Potsdam, D-14482 Potsdam, Germany

[2] Univ Potsdam, Inst Phys & Astron, D-14476 Potsdam, Germany

[3] European So Observ, D-85748 Garching, Germany

来源：

ASTRONOMISCHE NACHRICHTEN | 2011年 / 332卷 / 02期

关键词：

stars: mass-loss; stars: early-type; stars: magnetic field; stars: kinematics and dynamics; X-rays: stars; stars: individual: zeta Ophiuchi; X-RAY-EMISSION; MASS-LOSS; OB-STARS; ABSORPTION COMPONENTS; NITROGEN ENRICHMENT; PULSAR PSR-B1929+10; ROAP STARS; STELLAR; SPECTROSCOPY; SPECTRUM;

D O I：

10.1002/asna.201111516

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The star zeta Ophiuchi is one of the brightest massive stars in the northern hemisphere and was intensively studied in various wavelength domains. The currently available observational material suggests that certain observed phenomena are related to the presence of a magnetic field. We acquired spectropolarimetric observations of zeta Oph with FORS 1 mounted on the 8-m Kueyen telescope of the VLT to investigate if a magnetic field is indeed present in this star. Using all available absorption lines, we detect a mean longitudinal magnetic field < B-z >(all) = 141 +/- 45 G, confirming the magnetic nature of this star. We review the X-ray properties of zeta Oph with the aim to understand whether the X-ray emission of zeta Oph is dominated by magnetic or by wind instability processes. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：147 / 152

页数：6

共 49 条

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[2]

Babel J, 1997, ASTRON ASTROPHYS, V323, P121

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