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Related papers: Why are some A stars magnetic, while most are not?

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Magnetic fields are significant in the structure and evolution of stars. We present a comprehensive catalogue of 1784 known magnetic stars, detailing their identifications, HD numbers, precise locations, spectral types, and averaged…

Solar and Stellar Astrophysics · Physics 2023-07-25 Abdurepqet Rustem , Guoliang Lv , Jinzhong Liu , Chunhua Zhu , Yu Zhang , Dongxiang Shen , Yuhao Zhang , Xiaolong He

We investigate the connections between the magnetic fields and the X-ray emission from massive stars. Our study shows that the X-ray properties of known strongly magnetic stars are diverse: while some comply to the predictions of the…

Solar and Stellar Astrophysics · Physics 2015-05-30 L. M. Oskinova , W. -R. Hamann , J. P. Cassinelli , J. C. Brown , H. Todt

We have investigated a sample of 28 well-known spectroscopically-identified magnetic Ap/Bp stars, with weak, poorly-determined or previously undetected magnetic fields, with the aim of exploring the weak part of the magnetic field…

We study the effects of strong magnetic fields on the neutron star structure. If the interior field of a star is on the same order of the surface field currently observed, the influences of the magnetic field on the star mass and radius are…

Astrophysics · Physics 2014-10-13 Guangjun Mao , Akira Iwamoto , Zhuxia Li

Theories on the origin of magnetic fields in massive stars remain poorly developed, because the properties of their magnetic field as function of stellar parameters could not yet be investigated. To investigate whether magnetic fields in…

Various observational properties of Ap/Bp stars have been well-established such as the often-cited 10% incidence rate of strong, organized magnetic fields amongst all A- and B-type stars. However, these inferences have generally been drawn…

Solar and Stellar Astrophysics · Physics 2017-12-11 James Sikora , Gregg A. Wade , Jennifer Power

The positions in the H-R diagram of strongly magnetic Ap and Bp stars are compared with those of normal main sequence stars of types B7 to F2, with a view to investigating possible differences in evolutionary status between magnetic and…

Astrophysics · Physics 2007-05-23 S. Hubrig , P. North , G. Mathys

For several decades we have been cognizant of the presence of magnetic fields in early-type stars, but our understanding of their magnetic properties has recently (over the last decade) expanded due to the new generation of high-resolution…

Solar and Stellar Astrophysics · Physics 2015-06-16 Jason H. Grunhut , Coralie Neiner

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…

Solar and Stellar Astrophysics · Physics 2018-11-14 C. Neiner , A. Martin , G. Wade , M. Oksala

We review our knowledge of the mixing properties of magnetic OB stars and discuss whether the observational data presently available support, as predicted by some theoretical models, the idea that magnetic phenomena favour the transport of…

Solar and Stellar Astrophysics · Physics 2012-01-12 Thierry Morel

Regardless of the physical origin of stellar magnetic fields - fossil or dynamo induced - an inclination angle between the magnetic and rotation axes is very often observed. Absence of observational evidence in this direction in the solar…

Solar and Stellar Astrophysics · Physics 2018-04-27 A. Pastor Yabar , M. J. Martínez González , M. Collados

In the context of the MiMeS survey of magnetism in massive stars, 85 classical Be stars were observed in circular polarization with the aim of detecting magnetic fields at their surfaces. No direct evidence of such fields is found, in…

Solar and Stellar Astrophysics · Physics 2014-11-25 G. A. Wade , V. Petit , J. Grunhut , C. Neiner

Detection of magnetic fields has been reported in several sdO and sdB stars. Recent literature has cast doubts on the reliability of most of these detections. We revisit data previously published in the literature, and we present new…

Solar and Stellar Astrophysics · Physics 2015-06-04 John D Landstreet , Stefano Bagnulo , Luca Fossati , Stefan Jordan , Simon J O'Toole

Chemically peculiar (CP) stars are main-sequence A and B stars with abnormally strong or weak lines for certain elements. They generally have magnetic fields and all observables tend to vary with the same period. Chemically peculiar stars…

Solar and Stellar Astrophysics · Physics 2015-01-20 Markus Schöller , Swetlana Hubrig

Actually there exist 218 stars with measured phase curves of the longitudinal (effective) magnetic field B_e. In that group 172 objects are classified as magnetic chemically peculiar stars (mCP). Remaining objects are stars of various…

Solar and Stellar Astrophysics · Physics 2013-07-12 V. D. Bychkov , L. V. Bychkova , J. Madej

The recent years have brought great advances in our knowledge of magnetic fields in cool giant and supergiant stars. For example, starspots have been directly imaged on the surface of an active giant star using optical interferometry, and…

Solar and Stellar Astrophysics · Physics 2017-12-15 Heidi Korhonen

Since 2002, strong, organized magnetic fields have been firmly detected at the surfaces of about 10 Galactic O-type stars. In this paper I will review the characteristics of the inferred fields of individual stars, as well as the overall…

Solar and Stellar Astrophysics · Physics 2014-11-14 G. A. Wade , the MiMeS Collaboration

Magnetic fields are observed in star forming regions. However simulations of the late stages of star formation that do not include magnetic fields provide a good fit to the properties of young stars including the initial mass function (IMF)…

Solar and Stellar Astrophysics · Physics 2018-10-17 C. J. Nixon , J. E. Pringle

We explore the possibility that a magnetar may owe its strong magnetic field to a magnetized core which, as indicated by certain equations of state, may form due to phase transitions at high density mediated by strong interaction within a…

Astrophysics · Physics 2007-05-23 Dipankar Bhattacharya , Vikram Soni

Early-type stars show a bimodal distribution of magnetic field strengths, with some showing very strong fields ($\gtrsim 1\,\mathrm{kG}$) and others very weak fields ($\lesssim 10\,\mathrm{G}$). Recently, we proposed that this reflects the…

Solar and Stellar Astrophysics · Physics 2021-12-22 Adam S. Jermyn , Matteo Cantiello