First Results from SPARO: Evidence for Large-Scale Toroidal Magnetic Fields in the Galactic Center
We have observed the linear polarization of 450 micron continuum emission from the Galactic center, using a new polarimetric detector system that is operated on a 2 m telescope at the South Pole. The resulting polarization map extends ~ 170 pc along the Galactic plane and ~ 30 pc in Galactic latitud...
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2001
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ftcern:oai:cds.cern.ch:531039 2023-05-15T18:22:25+02:00 First Results from SPARO: Evidence for Large-Scale Toroidal Magnetic Fields in the Galactic Center Novák, G S Chuss, D T Dotson, J L Griffin, G S Loewenstein, R F Newcomb, M G Pernic, D Peterson, J B Renbarger, T 2001-09-05 http://cds.cern.ch/record/531039 eng eng http://cds.cern.ch/record/531039 astro-ph/0109074 oai:cds.cern.ch:531039 Astrophysics and Astronomy 2001 ftcern 2018-07-28T05:16:38Z We have observed the linear polarization of 450 micron continuum emission from the Galactic center, using a new polarimetric detector system that is operated on a 2 m telescope at the South Pole. The resulting polarization map extends ~ 170 pc along the Galactic plane and ~ 30 pc in Galactic latitude, and thus covers a significant fraction of the central molecular zone. Our map shows that this region is permeated by large-scale toroidal magnetic fields. We consider our results together with radio observations that show evidence for poloidal fields in the Galactic center, and with Faraday rotation observations. We compare all of these observations with the predictions of a magnetodynamic model for the Galactic center that was proposed in order to explain the Galactic Center Radio Lobe as a magnetically driven gas outflow. We conclude that the observations are basically consistent with the model. Other/Unknown Material South pole CERN Document Server (CDS) Faraday ENVELOPE(-64.256,-64.256,-65.246,-65.246) South Pole |
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CERN Document Server (CDS) |
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ftcern |
language |
English |
topic |
Astrophysics and Astronomy |
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Astrophysics and Astronomy Novák, G S Chuss, D T Dotson, J L Griffin, G S Loewenstein, R F Newcomb, M G Pernic, D Peterson, J B Renbarger, T First Results from SPARO: Evidence for Large-Scale Toroidal Magnetic Fields in the Galactic Center |
topic_facet |
Astrophysics and Astronomy |
description |
We have observed the linear polarization of 450 micron continuum emission from the Galactic center, using a new polarimetric detector system that is operated on a 2 m telescope at the South Pole. The resulting polarization map extends ~ 170 pc along the Galactic plane and ~ 30 pc in Galactic latitude, and thus covers a significant fraction of the central molecular zone. Our map shows that this region is permeated by large-scale toroidal magnetic fields. We consider our results together with radio observations that show evidence for poloidal fields in the Galactic center, and with Faraday rotation observations. We compare all of these observations with the predictions of a magnetodynamic model for the Galactic center that was proposed in order to explain the Galactic Center Radio Lobe as a magnetically driven gas outflow. We conclude that the observations are basically consistent with the model. |
author |
Novák, G S Chuss, D T Dotson, J L Griffin, G S Loewenstein, R F Newcomb, M G Pernic, D Peterson, J B Renbarger, T |
author_facet |
Novák, G S Chuss, D T Dotson, J L Griffin, G S Loewenstein, R F Newcomb, M G Pernic, D Peterson, J B Renbarger, T |
author_sort |
Novák, G S |
title |
First Results from SPARO: Evidence for Large-Scale Toroidal Magnetic Fields in the Galactic Center |
title_short |
First Results from SPARO: Evidence for Large-Scale Toroidal Magnetic Fields in the Galactic Center |
title_full |
First Results from SPARO: Evidence for Large-Scale Toroidal Magnetic Fields in the Galactic Center |
title_fullStr |
First Results from SPARO: Evidence for Large-Scale Toroidal Magnetic Fields in the Galactic Center |
title_full_unstemmed |
First Results from SPARO: Evidence for Large-Scale Toroidal Magnetic Fields in the Galactic Center |
title_sort |
first results from sparo: evidence for large-scale toroidal magnetic fields in the galactic center |
publishDate |
2001 |
url |
http://cds.cern.ch/record/531039 |
long_lat |
ENVELOPE(-64.256,-64.256,-65.246,-65.246) |
geographic |
Faraday South Pole |
geographic_facet |
Faraday South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
http://cds.cern.ch/record/531039 astro-ph/0109074 oai:cds.cern.ch:531039 |
_version_ |
1766201823181406208 |