Magnetic field measurements of O stars with FORS1 at the VLT
Received date / Accepted date Context. The presence of magnetic fields in O-type stars has been suspected for a long time. The discovery of such fields would explain a wide range of well documented enigmatic phenomena in massive stars, in particular cyclical wind variability, Hα emission variations,...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.313.6915 2023-05-15T18:50:47+02:00 Magnetic field measurements of O stars with FORS1 at the VLT S. Hubrig M. Schöller R. S. Schnerr J. F. González R. Ignace H. F. Henrichs The Pennsylvania State University CiteSeerX Archives 2008 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.313.6915 http://arxiv.org/pdf/0808.2039v1.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.313.6915 http://arxiv.org/pdf/0808.2039v1.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://arxiv.org/pdf/0808.2039v1.pdf Key words. polarization- stars early-type- star text 2008 ftciteseerx 2016-01-07T22:38:45Z Received date / Accepted date Context. The presence of magnetic fields in O-type stars has been suspected for a long time. The discovery of such fields would explain a wide range of well documented enigmatic phenomena in massive stars, in particular cyclical wind variability, Hα emission variations, chemical peculiarity, narrow X-ray emission lines and non-thermal radio/X-ray emission. Aims. To investigate the incidence of magnetic fields in O stars, we acquired 38 new spectropolarimetric observations with FORS1 (FOcal Reducer low dispersion Spectrograph) mounted on the 8-m Kueyen telescope of the VLT. Methods. Spectropolarimetric observations have been obtained at different phases for a sample of 13 O stars. 10 stars were observed in the spectral range 348–589 nm, HD36879 and HD148937 were observed in the spectral region 325–621 nm, and HD155806 was observed in both settings. To prove the feasibility of the FORS1 spectropolarimetric mode for the measurements of magnetic fields in hot stars, we present in addition 12 FORS1 observations of the mean longitudinal magnetic field in θ 1 OriC and compare them with measurements obtained with the MuSiCoS, ESPaDOnS and Narval spectropolarimeters. Results. Most stars in our sample which have been observed on different nights show a change of the magnetic field Text narval narval Unknown |
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English |
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Key words. polarization- stars early-type- star |
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Key words. polarization- stars early-type- star S. Hubrig M. Schöller R. S. Schnerr J. F. González R. Ignace H. F. Henrichs Magnetic field measurements of O stars with FORS1 at the VLT |
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Key words. polarization- stars early-type- star |
description |
Received date / Accepted date Context. The presence of magnetic fields in O-type stars has been suspected for a long time. The discovery of such fields would explain a wide range of well documented enigmatic phenomena in massive stars, in particular cyclical wind variability, Hα emission variations, chemical peculiarity, narrow X-ray emission lines and non-thermal radio/X-ray emission. Aims. To investigate the incidence of magnetic fields in O stars, we acquired 38 new spectropolarimetric observations with FORS1 (FOcal Reducer low dispersion Spectrograph) mounted on the 8-m Kueyen telescope of the VLT. Methods. Spectropolarimetric observations have been obtained at different phases for a sample of 13 O stars. 10 stars were observed in the spectral range 348–589 nm, HD36879 and HD148937 were observed in the spectral region 325–621 nm, and HD155806 was observed in both settings. To prove the feasibility of the FORS1 spectropolarimetric mode for the measurements of magnetic fields in hot stars, we present in addition 12 FORS1 observations of the mean longitudinal magnetic field in θ 1 OriC and compare them with measurements obtained with the MuSiCoS, ESPaDOnS and Narval spectropolarimeters. Results. Most stars in our sample which have been observed on different nights show a change of the magnetic field |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
S. Hubrig M. Schöller R. S. Schnerr J. F. González R. Ignace H. F. Henrichs |
author_facet |
S. Hubrig M. Schöller R. S. Schnerr J. F. González R. Ignace H. F. Henrichs |
author_sort |
S. Hubrig |
title |
Magnetic field measurements of O stars with FORS1 at the VLT |
title_short |
Magnetic field measurements of O stars with FORS1 at the VLT |
title_full |
Magnetic field measurements of O stars with FORS1 at the VLT |
title_fullStr |
Magnetic field measurements of O stars with FORS1 at the VLT |
title_full_unstemmed |
Magnetic field measurements of O stars with FORS1 at the VLT |
title_sort |
magnetic field measurements of o stars with fors1 at the vlt |
publishDate |
2008 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.313.6915 http://arxiv.org/pdf/0808.2039v1.pdf |
genre |
narval narval |
genre_facet |
narval narval |
op_source |
http://arxiv.org/pdf/0808.2039v1.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.313.6915 http://arxiv.org/pdf/0808.2039v1.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766244538178863104 |