B fields in OB stars (BOB): Low-resolution FORS2 spectropolarimetry of the first sample of 50 massive stars

@article{Fossati2015BFI,
  title={B fields in OB stars (BOB): Low-resolution FORS2 spectropolarimetry of the first sample of 50 massive stars},
  author={Luca Fossati and Norberto Castro and Markus Schoeller and Swetlana Hubrig and Norbert Langer and Thierry Morel and Maryline Briquet and Artemio Herrero and Norbert Przybilla and Hugues Sana and Fabian R N Schneider and Alex de Koter and the Bob collaboration},
  journal={Astronomy and Astrophysics},
  year={2015},
  volume={582}
}
Within the context of the collaboration “B fields in OB stars” (BOB), we used the FORS2 low-resolution spectropolarimeter to search for a magnetic field in 50 massive stars, including two reference magnetic massive stars. Because of the many controversies of magnetic field detections obtained with the FORS instruments, we derived the magnetic field values with two completely independent reduction and analysis pipelines. We compare and discuss the results obtained from the two pipelines. We… Expand
B fields in OB stars (BOB): Concluding the FORS 2 observing campaign
Aims. The B fields in OB stars (BOB) Collaboration is based on an ESO Large Programme to study the occurrence rate, properties, and ultimately the origin of magnetic fields in massive stars. Methods.Expand
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 andExpand
Statistics of magnetic field measurements in OBA stars and the evolution of their magnetic fields
We review the measurements of magnetic fields of OBA stars. Based on these data we confirm that magnetic fields are distributed according to a lognormal law with a mean logB = −0.5 (B in kG) with aExpand
First constraints on the magnetic field strength in extra-Galactic stars: FORS2 observations of Of?p stars in the Magellanic Clouds
Massive O-type stars play a dominant role in our Universe, but many of their properties remain poorly constrained. In the last decade magnetic fields have been detected in all Galactic members of theExpand
Searching for a magnetic field in Wolf–Rayet stars using FORS 2 spectropolarimetry
To investigate if magnetic fields are present in Wolf-Rayet stars, we selected a few stars in the Galaxy and one in the Large Magellanic Cloud (LMC). We acquired low-resolution spectropolarimetricExpand
The MiMeS survey of Magnetism in Massive Stars : magnetic analysis of the O-type stars
We present the analysis performed on spectropolarimetric data of 97 O-type targets included in the framework of the Magnetism in Massive Stars (MiMeS) Survey. Mean least-squares deconvolved Stokes IExpand
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 aExpand
Discovery of magnetic A supergiants: the descendants of magnetic main-sequence B stars
In the context of the high resolution, high signal-to-noise ratio, high sensitivity, spectropolarimetric survey BritePol, which complements observations by the BRITE constellation of nanosatellitesExpand
First results from the LIFE project: discovery of two magnetic hot evolved stars
We present the initial results of the Large Impact of magnetic Fields on the Evolution of hot stars (LIFE) project. The focus of this project is the search for magnetic fields in evolved OBA giantsExpand
The puzzling properties of the magnetic O star Tr16-22
Context. The detection of bright, hard, and variable X-ray emission in Tr16-22 prompted spectropolarimetric observations of this star, which in turn led to the discovery of a surface magnetic field.Expand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 46 REFERENCES
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
CRITICAL EVALUATION OF MAGNETIC FIELD DETECTIONS REPORTED FOR PULSATING B-TYPE STARS IN LIGHT OF ESPaDOnS, NARVAL, AND REANALYZED FORS1/2 OBSERVATIONS
Recent spectropolarimetric studies of seven slowly pulsating B (SPB) and β Cep stars have suggested that photospheric magnetic fields are more common in B-type pulsators than in the generalExpand
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.Expand
The B Fields in OB Stars (BOB) Survey
Abstract The B fields in OB stars (BOB) survey is an ESO large programme collecting spectropolarimetric observations for a large number of early-type stars in order to study the occurrence rate,Expand
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
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
On the consistency of magnetic field measurements of Ap stars: lessons learned from the FORS1 archive
Context. The ESO archive of FORS1 spectropolarimetric observations may be used to create a homogeneous database of magnetic field measurements. However, no systematic comparison of FORS fieldExpand
A search for strong, ordered magnetic fields in Herbig Ae/Be stars★
The origin of magnetic fields in intermediate- and high-mass stars is fundamentally a mystery. Clues towards solving this basic astrophysical problem can likely be found at the pre-main-sequenceExpand
The importance of non-photon noise in stellar spectropolarimetry. The spurious detection of a non-existing magnetic field in the A0 supergiant HD 92207
The low-resolution, Cassegrain mounted, FORS spectropolarimeter of the ESO Very Large Telescope is being extensively used for magnetic field surveys. Some of the new discoveries suggest thatExpand
Magnetic field detection in the B2 Vn star HR 7355
The B2Vn star HR 7355 is found to be a He-rich magnetic star. Spectropolarimetric data were obtained with FORS1 at UT2 on Paranal Observatory to measure the disc-averaged longitudinal magnetic fieldExpand
...
1
2
3
4
5
...