Discovery of new magnetic early-B stars within the MiMeS HARPSpol survey

  title={Discovery of new magnetic early-B stars within the MiMeS HARPSpol survey},
  author={Evelyne Alecian and Oleg Kochukhov and V{\'e}ronique Petit and Jason H. Grunhut and John D. Landstreet and Mary E. Oksala and Gregg A. Wade and Gaitee Hussain and Coralie Neiner and David Bohlender and The MiMeS Collaboration},
  journal={Astronomy and Astrophysics},
Context. The Magnetism in Massive Stars (MiMeS) project aims at understanding the origin of the magnetic fields in massive stars as well as their impact on stellar internal structure, evolution, and circumstellar environment. Aims. One of the objectives of the MiMeS project is to provide stringent observational constraints on the magnetic fields of massive stars; however, identification of magnetic massive stars is challenging, as only a few percent of high-mass stars host strong fields… 

Evidence of magnetic field decay in massive main-sequence stars

A significant fraction of massive main-sequence stars show strong, large-scale magnetic fields. The origin of these fields, their lifetimes, and their role in shaping the characteristics and

Asteroseismology of High-Mass Stars: New Insights of Stellar Interiors With Space Telescopes

  • D. Bowman
  • Physics, Geology
    Frontiers in Astronomy and Space Sciences
  • 2020
Massive stars are important metal factories in the Universe. They have short and energetic lives, and many of them inevitably explode as a supernova and become a neutron star or black hole. In turn,

B field in OB stars (BOB): The outstandingly strong magnetic field in the evolved He-strong star CPD -62° 2124

The origin and evolution of magnetism in OB stars is far from being well understood. With approximately 70 magnetic OB stars known, any new object with unusual characteristics may turn out to be a

Blue supergiants as descendants of magnetic main sequence stars

About 10$\%$ of the massive main sequence stars have recently been found to host a strong, large scale magnetic field. Both, the origin and the evolutionary consequences of these fields are largely

B fields in OB stars (BOB): Detection of a magnetic field in the He-strong star CPD -57° 3509

Aims. We report the detection of a magnetic field in the helium-strong star CPD-57 degrees 3509 (B2 IV), a member of the Galactic open cluster NGC3293, and characterise the star's atmospheric and

Magnetic fields of chemically peculiar and related stars. I. Main results of 2014 and near-future prospects

We make a critical analysis of the results of studies of magnetic fields in chemically peculiar and related stars, published mostly in 2014. Methodological matters are discussed, and research results

Fossil field decay due to nonlinear tides in massive binaries

Context.Surface magnetic fields have been detected in 5–10% of isolated massive stars, hosting outer radiative envelopes. They are often thought to have a fossil origin, resulting from the stellar

B fields in OB stars (BOB): on the detection of weak magnetic fields in the two early B-type stars beta CMa and epsilon CMa Possible lack of a "magnetic desert" in massive stars

Only a small fraction of massive stars seem to host a measurable structured magnetic field, whose origin is still unknown and whose implications for stellar evolution still need to be assessed.

A JVLA survey of the high frequency radio emission of the massive magnetic B- and O-type stars

We conducted a survey of seven magnetic O-type stars and eleven B-type stars with masses above 8 M_⊙ using the Very Large Array in the 1, 3 and 13 cm bands. The survey resulted in a detection of two

The magnetic characteristics of Galactic OB stars from the MiMeS survey of magnetism in massive stars

Abstract The Magnetism in Massive Stars (MiMeS) project represents the largest systematic survey of stellar magnetism ever undertaken. Based on a sample of over 550 Galactic B and O-type stars, the



First HARPSpol discoveries of magnetic fields in massive stars

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

HD 96446: a puzzle for current models of magnetospheres?

Context. Oblique magnetic dipole fields have been detected in Bp stars for several decades, and more recently also in normal massive stars. In the past decade, it has been established that stellar

Discovery of magnetic fields in the very young, massive stars W601 (NGC 6611) and OI 201 (NGC 2244) ⋆

Context: Recent spectropolarimetric observations of Herbig Ae/Be stars have yielded new arguments in favour of a fossil origin for the magnetic fields of intermediate mass stars. Aims: To study the

Evolutionary state of magnetic chemically peculiar stars

Context. The photospheres of about 5–10% of the upper main sequence stars exhibit remarkable chemical anomalies. Many of these chemically peculiar (CP) stars have a global magnetic field, the origin

Searching for links between magnetic fields and stellar evolution III. Measurement of magnetic fields in open cluster Ap stars with ESPaDOnS

Context. A small fraction of upper main sequence stars have strong, highly structured magnetic fields. The origin and evolution of these fields are not adequately understood. Aims. We are carrying

Investigation of the magnetic field characteristics of Herbig Ae/Be stars: Discovery of the pre-main sequence progenitors of the magnetic Ap/Bp stars

We are investigating the magnetic characteristics of pre-main sequence Herbig Ae/Be stars, with the aim of (1) understanding the origin and evolution of magnetism in intermediate-mass stars, and (2)

Characterization of the magnetic field of the Herbig Be star HD 200775

The origin of the magnetic fields observed in some intermedia te mass and high mass main sequence stars is still a matter of vigorous debate. The favo ured hypothesis is a fossil field origin, in

A magnetic confinement versus rotation classification of massive-star magnetospheres

Building on results from the Magnetism in Massive Stars (MiMeS) project, this paper shows how a two-parameter classification of massive-star magnetospheres in terms of the magnetic wind confinement

Magnetic Fields of Nondegenerate Stars

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

Searching for links between magnetic fields and stellar evolution - I. A survey of magnetic fields in open cluster A- and B-type stars with FORS1

Context. About 5% of upper main sequence stars are permeated by a strong magnetic field, the origin of which is still matter of debate. Aims. With this work we provide observational material to study