EDP Sciences
Free Access
Issue
A&A
Volume 437, Number 1, July I 2005
Page(s) 227 - 234
Section Stellar structure and evolution
DOI https://doi.org/10.1051/0004-6361:20042554


A&A 437, 227-234 (2005)
DOI: 10.1051/0004-6361:20042554

Discovery of magnetic fields in hot subdwarfs

S. J. O'Toole1, S. Jordan2, S. Friedrich3 and U. Heber1

1  Dr. Remeis-Sternwarte, Astronomisches Institut der Universität Erlangen-Nürnberg, Sternwartstr. 7, Bamberg 96049, Germany
    e-mail: otoole@sternwarte.uni-erlangen.de
2  Astronomisches Rechen-Institut, Mönchhofstr. 12-14, 69221 Heidelberg, Germany
3  Max-Planck-Institut für extraterrestrische Physik, Giessenbachstr., 85748 Garching, Germany

(Received 16 December 2004 / Accepted 4 March 2005 )

Abstract
We present polarisation measurements of sdB and sdO stars using FORS1 on the VLT. The observations were made as part of a project to determine whether magnetic fields in two super-metal-rich stars can explain their extreme abundance peculiarities. Field strengths of up to ~1.5 kG range have been measured at varying levels of significance in each of our six targets, however no clear evidence was found between apparently normal subdwarfs and the metal-rich objects. The origin of the magnetic fields is unknown. We also discuss the implications of our measurements for magnetic flux conservation in late stages of stellar evolution.


Key words: stars: subdwarfs -- stars: magnetic fields

SIMBAD Objects in preparation



© ESO 2005

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.