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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…

Solar and Stellar Astrophysics · Physics 2019-12-16 Kyle C. Augustson

Recent observations have revealed the existence of a population of slowly-rotating, nitrogen-rich B dwarfs that are not predicted by evolutionary models including rotational mixing. However, as theoretical arguments suggest that magnetic…

Solar and Stellar Astrophysics · Physics 2010-10-21 Thierry Morel

The Magnetism in Massive Stars (MiMeS) Project is a consensus collaboration among many of the foremost international researchers of the physics of hot, massive stars, with the basic aim of understanding the origin, evolution and impact of…

In the framework of the Magnetism in Massive Stars (MiMeS) project, a HARPSpol Large Program at the 3.6m-ESO telescope has recently started to collect high-resolution spectropolarimetric data of a large number of Southern massive OB stars…

Solar and Stellar Astrophysics · Physics 2012-11-07 E. Alecian , R. Peralta , M. E. Oksala , C. Neiner , the MiMeS collaboration

Mass loss is a key process in the evolution of massive stars, and must be understood quantitatively to be successfully included in broader astrophysical applications. In this review, we discuss various aspects of radiation driven mass loss,…

Astrophysics · Physics 2008-12-18 J. Puls , J. S. Vink , F. Najarro

Strong, stable, and organised magnetic fields are present at the surfaces of a small fraction of OBA stars. These "fossil fields" exhibit uniform characteristics in stars over a tremendous range of stellar mass, age, temperature, and…

Solar and Stellar Astrophysics · Physics 2017-12-29 G. A. Wade , C. Neiner

Magnetic massive stars -- which are being discovered with increasing frequency -- represent a new category of wind-shaping mechanism for O and B stars. Magnetic channeling of these stars' radiation-driven winds, the Magnetically Confined…

Solar and Stellar Astrophysics · Physics 2011-11-08 V. Petit , S. P. Owocki , M. E. Oksala , the MiMeS Collaboration

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…

High Energy Astrophysical Phenomena · Physics 2026-03-12 José A. Pons , Clara Dehman , Daniele Viganò

Stellar evolution models of massive stars are very sensitive to the adopted mass-loss scheme. The magnitude and evolution of mass-loss rates significantly affect the main sequence evolution, and the properties of post-main sequence objects,…

Solar and Stellar Astrophysics · Physics 2017-02-01 Zsolt Keszthelyi , Joachim Puls , Gregg Wade

In massive stars, magnetic fields are thought to confine the outflowing radiatively-driven wind, resulting in X-ray emission that is harder, more variable and more efficient than that produced by instability-generated shocks in non-magnetic…

Astrophysics · Physics 2009-11-13 V. Petit , G. A. Wade , L. Drissen , T. Montmerle , E. Alecian

Mass loss due to line-driven winds is central to our understanding of the evolution of massive stars. We extend the evolution models introduced in Paper I, where the mass loss recipe is based on the simultaneous calculation of the wind…

Solar and Stellar Astrophysics · Physics 2023-05-17 Alex Camilo Gormaz-Matamala , Jorge Cuadra , Georges Meynet , Michel Curé

After highlighting the principle and power of asteroseismology for stellar physics, we briefly emphasize some recent progress in this research for various types of stars. We give an overview of high-precision high duty-cycle space…

Solar and Stellar Astrophysics · Physics 2015-06-22 Conny Aerts

Context. The first magnetic fields in O- and B-type stars that do not belong to the Bp-star class, have been discovered. The cyclic UV wind-line variability, which has been observed in a significant fraction of early-type stars, is likely…

Solar and Stellar Astrophysics · Physics 2011-08-15 R. S. Schnerr , H. F. Henrichs , C. Neiner , E. Verdugo , J. de Jong , V. C. Geers , K. Wiersema , B. van Dalen , A. Tijani , B. Plaggenborg , K. L. J. Rygl

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

This work aims at studying how magnetic fields affect the observational properties and the long-term evolution of isolated neutron stars, which are the strongest magnets in the universe. The extreme physical conditions met inside these…

High Energy Astrophysical Phenomena · Physics 2013-10-07 Daniele Viganò

We rediscuss the evolutionary state of upper main sequence magnetic stars using a sample of Ap and Bp stars with accurate Hipparcos parallaxes and definitely determined longitudinal magnetic fields. FORS1 at the VLT in spectropolarimetric…

Astrophysics · Physics 2007-05-23 S. Hubrig , P. North , T. Szeifert

Strong, kilo-Gauss, magnetic fields are required to explain a range of observational properties in young, accreting pre-main sequence (PMS) systems. We review the techniques used to detect magnetic fields in PMS stars. Key results from a…

Solar and Stellar Astrophysics · Physics 2015-06-18 Gaitee A. J. Hussain , Evelyne Alecian

Magnetism can greatly impact the evolution of stars. In some stars with OBA spectral types there is direct evidence via the Zeeman effect for stable, large-scale magnetospheres, which lead to the spin-down of the stellar surface and reduced…

Magnetic activity is a ubiquitous feature of stars with convective outer layers, with implications from stellar evolution to planetary atmospheres. Investigating the mechanisms responsible for the observed stellar activity signals from days…

Solar and Stellar Astrophysics · Physics 2023-10-17 Emre Işık , Jennifer L. van Saders , Ansgar Reiners , Travis S. Metcalfe

The observable characteristics and subsequent evolution of young stellar populations is dominated by their massive stars. As our understanding of those massive stars and the factors affecting their evolution improves, so our interpretation…

Astrophysics of Galaxies · Physics 2022-09-28 Jan J. Eldridge , Elizabeth R. Stanway