The magnetic field of evolved hot stars. (arXiv:1811.05258v1 [astro-ph.SR])
<a href="http://arxiv.org/find/astro-ph/1/au:+Neiner_C/0/1/0/all/0/1">C. Neiner</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Martin_A/0/1/0/all/0/1">A. Martin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Wade_G/0/1/0/all/0/1">G. Wade</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Oksala_M/0/1/0/all/0/1">M. Oksala</a>
About 10% of hot stars host a fossil magnetic field on the pre-main sequence
and main sequence. However, the first magnetic evolved hot stars have been
discovered only recently. An observing program has been set up to find more
such objects. This will allow us to test how fossil fields evolve, and the
impact of magnetism on stellar evolution. Already 7 evolved magnetic hot stars
are now known and the rate of magnetic discoveries in the survey suggests that
they host dynamo fields in addition to fossil fields. Finally, the weakness of
the measured fields is compatible at first order with simple magnetic flux
conservation, although the current statistics cannot exclude intrinsic decay or
enhancement during stellar evolution.
About 10% of hot stars host a fossil magnetic field on the pre-main sequence
and main sequence. However, the first magnetic evolved hot stars have been
discovered only recently. An observing program has been set up to find more
such objects. This will allow us to test how fossil fields evolve, and the
impact of magnetism on stellar evolution. Already 7 evolved magnetic hot stars
are now known and the rate of magnetic discoveries in the survey suggests that
they host dynamo fields in addition to fossil fields. Finally, the weakness of
the measured fields is compatible at first order with simple magnetic flux
conservation, although the current statistics cannot exclude intrinsic decay or
enhancement during stellar evolution.
http://arxiv.org/icons/sfx.gif
