TY  - JOUR
A1  - Hubrig, Swetlana
A1  - Oskinova, Lida
A1  - Schoeller, M.
T1  - First detection of a magnetic field in the fast rotating runaway Oe star zeta Ophiuchi
T2  - Astronomische Nachrichten = Astronomical notes
N2  - 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.
KW  - stars: mass-loss
KW  - stars: early-type
KW  - stars: magnetic field
KW  - stars: kinematics and dynamics
KW  - X-rays: stars
KW  - stars: individual: zeta Ophiuchi
Y1  - 2011
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/37032
SN  - 0004-6337
VL  - 332
IS  - 2
SP  - 147
EP  - 152
PB  - Wiley-Blackwell
CY  - Malden
ER  -