Magnetic fields of non-degenerate stars

Details Magnetic fields of non-degenerate stars Magnetic fields of non-degenerate stars

2009-04-13

arxiv.org/abs/0904.1938v1

Ann.Rev.Astron.Astrophys.47:333-370,2009

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

ARA&A 47 (in press) - 41 pages, 7 figures

Scientific paper

10.1146/annurev-astro-082708-101

Magnetic fields are present in a wide variety of stars throughout the HR diagram and play a role at basically all evolutionary stages, from very-low-mass dwarfs to very massive stars, and from young star-forming molecular clouds and protostellar accretion discs to evolved giants/supergiants and magnetic white dwarfs/neutron stars. These fields range from a few microG (e.g., in molecular clouds) to TeraG and more (e.g., in magnetic neutron stars); in non-degenerate stars in particular, they feature large-scale topologies varying from simple nearly-axisymmetric dipoles to complex non-axsymmetric structures, and from mainly poloidal to mainly toroidal topology. After recalling the main techniques of detecting and modelling stellar magnetic fields, we review the existing properties of magnetic fields reported in cool, hot and young non-degenerate stars and protostars, and discuss our understanding of the origin of these fields and their impact on the birth and life of stars.

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