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Large-scale dipolar surface magnetic fields have been detected in a fraction of OB stars, however only few stellar evolution models of massive stars have considered the impact of these fossil fields. We are performing 1D hydrodynamical…

太阳与恒星天体物理 · 物理学 2017-11-15 Z. Keszthelyi , G. A. Wade , V. Petit

Observational and theoretical work has now established that the fossil fields of magnetic massive stars are surviving remnants from an earlier event, or an earlier evolutionary phase. However, many important questions remain regarding the…

太阳与恒星天体物理 · 物理学 2020-01-30 Pınar Cerrahoğlu , Véronique Petit , Zsolt Keszthelyi , Alexandre David-Uraz

Massive stars are the drivers of star formation and galactic dynamics due to their relatively short lives and explosive demises, thus impacting all of astrophysics. Since they are so impactful on their environments, through their winds on…

太阳与恒星天体物理 · 物理学 2019-12-16 Kyle C. Augustson

At metallicities lower than that of the Small Magellanic Cloud, it remains essentially unexplored how fossil magnetic fields, forming large-scale magnetospheres, could affect the evolution of massive stars, thereby impacting the fundamental…

太阳与恒星天体物理 · 物理学 2024-07-31 Z. Keszthelyi , J. Puls , G. Chiaki , H. Nagakura , A. ud-Doula , T. Takiwaki , N. Tominaga

Over the last decade, tremendous strides have been achieved in our understanding of magnetism in main sequence hot stars. In particular, the statistical occurrence of their surface magnetism has been established (~10%) and the field origin…

Surface magnetic fields have a strong impact on stellar mass loss and rotation and, as a consequence, on the evolution of massive stars. In this work we study the influence of an evolving dipolar surface fossil magnetic field with an…

太阳与恒星天体物理 · 物理学 2019-03-27 Z. Keszthelyi , G. Meynet , C. Georgy , G. A. Wade , V. Petit , A. David-Uraz

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…

太阳与恒星天体物理 · 物理学 2018-11-14 C. Neiner , A. Martin , G. Wade , M. Oksala

Magnetic fields on hot stars can produce a variety of interesting effects on the velocity, density, and temperature structure in the winds from the stars. The fields can produce a longitudinal dependence of the mass flux, which would lead…

天体物理学 · 物理学 2007-05-23 Joseph P. Cassinelli

We explore the sensitivity of massive stars to neutrino magnetic moments. We find that the additional cooling due to the neutrino magnetic moments bring about qualitative changes to the structure and evolution of stars in the mass window 7…

天体物理学 · 物理学 2010-01-05 Alexander Heger , Alexander Friedland , Maurizio Giannotti , Vincenzo Cirigliano

The impact of strong magnetic fields B>10e13 G on the thermal evolution of neutron stars is investigated, including crustal heating by magnetic field decay. For this purpose, we perform 2D cooling simulations with anisotropic thermal…

天体物理学 · 物理学 2010-11-11 Deborah N. Aguilera , José A. Pons , Juan A. Miralles

The strong magnetic fields of neutron stars are closely linked to their observed thermal, spectral, and timing properties, such as the distribution of spin periods and their derivatives. To understand the evolution of astrophysical…

高能天体物理现象 · 物理学 2026-03-12 José A. Pons , Clara Dehman , Daniele Viganò

While magnetic fields have long been considered to be important for the evolution of magnetic non-degenerate stars and compact stars, it has become clear in recent years that actually all of the stars are deeply affected. This is…

太阳与恒星天体物理 · 物理学 2021-02-03 Koh Takahashi , Norbert Langer

This talk summarizes results from recent MHD simulations of the role of a dipole magnetic field in inducing large-scale structure in the line-driven stellar winds of hot, luminous stars. Unlike previous fixed-field analyses, the MHD…

天体物理学 · 物理学 2007-05-23 Asif ud-Doula , Stan Owocki

Magnetic fields have been detected in most if not all types of stars across the Hertzsprung-Russell diagram. Where present, these fields have the potential to significantly impact the evolution of their host stars. Furthermore, they…

太阳与恒星天体物理 · 物理学 2017-12-21 A. J. Martin

Magnetic fields in nearby, star-forming galaxies reveal both large-scale patterns and small-scale structures. A large-scale field reversal may exist in the Milky Way but no such reversals have been observed so far in external galaxies. The…

星系天体物理 · 物理学 2015-05-30 David Moss , Rodion Stepanov , Tigran Arshakian , Rainer Beck , Marita Krause , Dmitri Sokoloff

Massive stars have a strong impact on their surroundings, in particular when they produce a core-collapse supernova at the end of their evolution. In these proceedings, we review the general evolution of massive stars and their properties…

太阳与恒星天体物理 · 物理学 2018-02-22 Raphael Hirschi , David Arnett , Andrea Cristini , Cyril Georgy , Casey Meakin , Ian Walkington

Many stars across all classes possess strong enough magnetic fields to influence dynamical flow of material off the stellar surface. For the case of massive stars (O and B types), about 10\% of them harbour strong, globally ordered (mostly…

太阳与恒星天体物理 · 物理学 2023-04-05 Asif ud-Doula , Stan Owocki

Stars interact with their planets through gravitation, radiation, and magnetic fields. Although magnetic activity decreases with time, reducing associated high-energy (e.g., coronal XUV emission, flares), stellar winds persist throughout…

太阳与恒星天体物理 · 物理学 2022-11-08 J. J. Chebly , J. D. Alvarado-Gómez , K. Poppenhaeger

Our understanding of massive star evolution is in flux, due to recent upheavals in our view of mass loss, and observations of a high binary fraction among O-type stars. Mass-loss rates for standard metallicity-dependent winds of hot stars…

太阳与恒星天体物理 · 物理学 2015-06-18 Nathan Smith

The strong magnetic field of neutron stars is intimately coupled to the observed temperature and spectral properties, as well as to the observed timing properties (distribution of spin periods and period derivatives). Thus, a proper…

高能天体物理现象 · 物理学 2019-12-23 José A. Pons , Daniele Viganò
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