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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ftdatacite:10.48550/arxiv.astro-ph/0109074 2023-05-15T18:22:31+02:00 First Results from SPARO: Evidence for Large-Scale Toroidal Magnetic Fields in the Galactic Center Novak, G. Chuss, D. T. Renbarger, T. Griffin, G. S. Newcomb, M. G. Peterson, J. B. Loewenstein, R. F. Pernic, D. Dotson, J. L. 2001 https://dx.doi.org/10.48550/arxiv.astro-ph/0109074 https://arxiv.org/abs/astro-ph/0109074 unknown arXiv https://dx.doi.org/10.1086/368156 Assumed arXiv.org perpetual, non-exclusive license to distribute this article for submissions made before January 2004 http://arxiv.org/licenses/assumed-1991-2003/ Astrophysics astro-ph FOS Physical sciences article-journal Article ScholarlyArticle Text 2001 ftdatacite https://doi.org/10.48550/arxiv.astro-ph/0109074 https://doi.org/10.1086/368156 2022-04-01T16:45:34Z 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. : 11 pages, 2 figures, 1 table, submitted to ApJ Lett Text South pole DataCite Metadata Store (German National Library of Science and Technology) Faraday ENVELOPE(-64.256,-64.256,-65.246,-65.246) South Pole |
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DataCite Metadata Store (German National Library of Science and Technology) |
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topic |
Astrophysics astro-ph FOS Physical sciences |
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Astrophysics astro-ph FOS Physical sciences Novak, G. Chuss, D. T. Renbarger, T. Griffin, G. S. Newcomb, M. G. Peterson, J. B. Loewenstein, R. F. Pernic, D. Dotson, J. L. First Results from SPARO: Evidence for Large-Scale Toroidal Magnetic Fields in the Galactic Center |
topic_facet |
Astrophysics astro-ph FOS Physical sciences |
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. : 11 pages, 2 figures, 1 table, submitted to ApJ Lett |
format |
Text |
author |
Novak, G. Chuss, D. T. Renbarger, T. Griffin, G. S. Newcomb, M. G. Peterson, J. B. Loewenstein, R. F. Pernic, D. Dotson, J. L. |
author_facet |
Novak, G. Chuss, D. T. Renbarger, T. Griffin, G. S. Newcomb, M. G. Peterson, J. B. Loewenstein, R. F. Pernic, D. Dotson, J. L. |
author_sort |
Novak, G. |
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 |
publisher |
arXiv |
publishDate |
2001 |
url |
https://dx.doi.org/10.48550/arxiv.astro-ph/0109074 https://arxiv.org/abs/astro-ph/0109074 |
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 |
https://dx.doi.org/10.1086/368156 |
op_rights |
Assumed arXiv.org perpetual, non-exclusive license to distribute this article for submissions made before January 2004 http://arxiv.org/licenses/assumed-1991-2003/ |
op_doi |
https://doi.org/10.48550/arxiv.astro-ph/0109074 https://doi.org/10.1086/368156 |
_version_ |
1766201935303540736 |