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Magnetic main sequence stars as progenitors of blue supergiants

Published online by Cambridge University Press:  23 January 2015

I. Petermann ,
N. Castro  and
N. Langer
I. Petermann
Affiliation:
Argelander Institute for Astronomy, Bonn, Germany email: ilka@astro.uni-bonn.de
N. Castro
Affiliation:
Argelander Institute for Astronomy, Bonn, Germany email: ilka@astro.uni-bonn.de
N. Langer
Affiliation:
Argelander Institute for Astronomy, Bonn, Germany email: ilka@astro.uni-bonn.de
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Abstract

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Blue supergiants (BSGs) to the right the main sequence band in the HR diagram can not be reproduced by standard stellar evolution calculations. We investigate whether a reduced convective core mass due to strong internal magnetic fields during the main sequence might be able to recover this population of stars. We perform calculations with a reduced mass of the hydrogen burning convective core of stars in the mass range 3–30 M⊙ in a parametric way, which indeed lead to BSGs. It is expected that these BSGs would still show large scale magnetic fields in the order of 10 G.

Keywords

Stars: massive – Stars: supergiants – Stars: magnetic field – Stars: evolution
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Issue S307: New windows on massive stars: asteroseismology, interferometry, and spectropolarimetry , June 2014 , pp. 391 - 392
Copyright
Copyright © International Astronomical Union 2015 

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