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

@article{Fossati2014BFI,
  title={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},
  author={Luca Fossati and Norberto Castro and Thierry Morel and Norbert Langer and Maryline Briquet and Thorsten A. Carroll and Swetlana Hubrig and M. Fernanda Nieva and Lidia M Oskinova and Norbert Przybilla and Fabian R N Schneider and Markus Scholler and Sergio Sim{\'o}n-D{\'i}az and Ilya Ilyin and Alex de Koter and Andreas Reisenegger and Hugues Sana and the Bob collaboration},
  journal={Astronomy and Astrophysics},
  year={2014},
  volume={574}
}
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. Within the context of the "B fields in OB stars (BOB)" collaboration, we used the HARPSpol spectropolarimeter to observe the early B-type stars β CMa (HD 44743; B1 II/III) andCMa (HD 52089; B1.5II) in December 2013 and April 2014. For both stars, we consistently detected the signature of a weak (<30 G in… Expand
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References

SHOWING 1-10 OF 92 REFERENCES
B fields in OB stars (BOB): The discovery of a magnetic field in a multiple system in the Trifid nebula, one of the youngest star forming regions
Aims. Recent magnetic field surveys in O- and B-type stars revealed that about 10% of the core-hydrogen-burning massive stars host large-scale magnetic fields. The physical origin of these fields isExpand
New magnetic field measurements of β Cephei stars and slowly pulsating B stars
We present the results of the continuation of our magnetic survey with FORS 1 at the VLT of a sample of B-type stars consisting of confirmed or candidate β Cephei stars and Slowly Pulsating BExpand
On the incidence of magnetic fields in slowly pulsating B, β Cephei and B-type emission-line stars
We have obtained 40 high-resolution circular spectropolarimetric measurements of 12 slowly pulsating B (SPB) stars, eight β Cephei stars and two Be stars with the Echelle Spectropolarimetric DeviceExpand
Discovery of magnetic fields in the βCephei star ξ1 CMa and in several slowly pulsating B stars
We present the results of a magnetic survey of a sample of eight β Cephei stars and 26 slowly pulsating B (SPBs) stars with the FOcal Reducer low dispersion Spectrograph at the Very Large Telescope.Expand
Measuring magnetic fields of early-type stars with $\vec{FORS{\it 1}}$ at the $\vec{VLT}$
This paper describes an experiment aimed at evaluating the capability of the FORS1 instrument at the VLT for measuring weak ('0.1%) Zeeman circular polarization signatures in stellar H Balmer lines.Expand
The IACOB project - I. Rotational velocities in northern Galactic O- and early B-type stars revisited. The impact of other sources of line-broadening
Context. Stellar rotation is an important parameter in the evolution of massive stars. Accurate and reliable measurements of projected rotational velocities in large samples of OB stars are cruci alExpand
Weak magnetic fields in Ap/Bp stars - Evidence for a dipole field lower limit and a tentative interp
Aims. We investigated a sample of 28 well-known spectroscopically-identified magnetic Ap/Bp stars, with weak, poorly-determined or previously undetected magnetic fields. The aim of this study is toExpand
Two spotted and magnetic early B-type stars in the young open cluster NGC 2264 discovered by MOST and ESPaDOnS
Star clusters are known as superb tools for understanding stellar evolution. In a quest for understanding the physical o rigin of magnetism and chemical peculiarity in about 7% of the massiveExpand
Detection of a weak surface magnetic field on Sirius A: are all tepid stars magnetic?
Aims. We aim at a highly sensitive search for weak magnetic fields in main sequence stars of intermediate mass, by scanning classes of stars with no previously reported magnetic members. AfterExpand
Present-day cosmic abundances - A comprehensive study of nearby early B-type stars and implications for stellar and Galactic evolution and interstellar dust models
Aims. A carefully selected sample of early B-type stars in OB associations and the field within the solar neighbourhood is studi ed comprehensively. Present-day abundances for the astrophysicallyExpand
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2
3
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5
...