Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-07-11
Astronomy and Astrophysics
Astrophysics
6 pages ApJ emulate style; accepted to ApJ
Scientific paper
10.1086/591784
A growing number of observations indicate that magnetic fields are present among a small fraction of massive O- and B-type stars, yet the origin of these fields remains unclear. Here we present the results of a VLT/FORS1 spectropolarimetric survey of 15 B-type members of the open cluster NGC 3766. We have detected two magnetic B stars in the cluster, including one with a large field of nearly 2 kG, and we find marginal detections of two additional stars. There is no correlation between the observed longitudinal field strengths and the projected rotational velocity, suggesting that a dynamo origin for the fields is unlikely. We also use the Oblique Dipole Rotator model to simulate populations of magnetic stars with uniform or slightly varying magnetic flux on the ZAMS. None of the models successfully reproduces our observed range in B_l and the expected number of field detections, and we rule out a purely fossil origin for the observed fields.
No associations
LandOfFree
Detection of Magnetic Massive Stars in the Open Cluster NGC 3766 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Detection of Magnetic Massive Stars in the Open Cluster NGC 3766, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detection of Magnetic Massive Stars in the Open Cluster NGC 3766 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-491120