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The energy budget of stellar magnetic fields [PDF]
Monthly Notices of the Royal Astronomical Society, 2015 Spectropolarimetric observations have been used to map stellar magnetic fields, many of which display strong bands of azimuthal fields that are toroidal. A number of explanations have been proposed to explain how such fields might be generated though none are definitive.
Aline Vidotto +2 more
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Stable magnetic fields in stellar interiors [PDF]
Astronomy and Astrophysics, 2006 19 pages, 24 figures, submitted to A& ...
Aake Nordlund, J Braithwaite
exaly +4 more sources
Magnetic Fields in Stellar Jets [PDF]
The Astrophysical Journal, 2007 Although several lines of evidence suggest that jets from young stars are driven magnetically from accretion disks, existing observations of field strengths in the bow shocks of these flows imply that magnetic fields play only a minor role in the dynamics at these locations. To investigate this apparent discrepancy we performed numerical simulations of
Hartigan, P. +3 more
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Recent Measurements of Stellar Magnetic Fields [PDF]
Symposium - International Astronomical Union, 1991 High resolution, high S/N spectra have been successfully modeled to yield information on the magnetic properties of cool stars for some 15 years now. These analyses yield estimates of the intensity weighted surface filling factor of active regions, f, and the mean unsigned field strength in these regions), B.
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Estimations and Scaling Laws for Stellar Magnetic Fields [PDF]
The Astrophysical Journal, 2022 Abstract In rapidly rotating turbulence (i.e., a Rossby number much less than unity), the standard mixing length theory for turbulent convection breaks down. However, the Coriolis force enters the force balance such that the magnetic field eventually depends on rotation.
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The basic role of magnetic fields in stellar evolution [PDF]
Proceedings of the International Astronomical Union, 2008 AbstractMagnetic field is playing an important role at all stages of star evolution from star formation to the endpoints. The main effects are briefly reviewed. We also show that O–type stars have large convective envelopes, where convective dynamo could work.
Maeder, André +3 more
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Machine Learning for Stellar Magnetic Field Determination [PDF]
International Journal of Computational Intelligence Systems, 2018 Abstract In this work we present the results for the automatic determination of the mean longitudinal magnetic field in polarized stellar spectra through the analysis of spectropolarimetric observations. In order to determine this important parameter, we first developed a synthetic database encompassing a set of different stellar spectra, each one ...
J. P. Córdova Barbosa +2 more
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Masers and Stellar Magnetic Fields [PDF]
Symposium - International Astronomical Union, 1990 Observations of circular polarization of molecular masers associated with late type giant and supergiant stars can be used to estimate the magnetic field strength in the masing region. Magnetic field strengths of ~ 5 mG are deduced for OH masers in circumstellar envelopes at distances of ~ 1016 cm from the star, and magnetic field strengths of ~ 50 G ...
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Evolution of Stellar Magnetic Fields [PDF]
Proceedings of the International Astronomical Union, 2012 AbstractStellar magnetic fields can reliably be characterized by several magnetic activity indicators, such as X-ray or radio luminosity. Physical processes leading to such emission provide important information on dynamic processes in stellar atmospheres and magnetic structuring.
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Magnetic Fields and Stellar Evolution [PDF]
Symposium - International Astronomical Union, 1981 Magnetic fields are now observed or inferred in a wide variety of stellar objects. The class of early-type stars with strong large-scale fields extends from types B to F, with effective fields from 300 gauss up to several x 104 gauss (Borra and Landstreet 1980).
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