VERY LARGE ARRAY DETECTION OF THE 36 GHz ZEEMAN EFFECT IN DR21W REVISITED
We report on the observation of the 36 GHz methanol maser line in the star-forming region DR21W to accurately measure the Zeeman effect. The Zeeman signature reported by Fish et al. became suspicious after an instrumental effect was discovered in the early days of the commissioning of the Very Large...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
IOP Publishing
2015
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| Online Access: | http://hdl.handle.net/1721.1/95469 |
| _version_ | 1826197652903034880 |
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| author | Momjian, Emmanuel Fish, Vincent L. Sjouwerman, Lorant O. |
| author2 | Haystack Observatory |
| author_facet | Haystack Observatory Momjian, Emmanuel Fish, Vincent L. Sjouwerman, Lorant O. |
| author_sort | Momjian, Emmanuel |
| collection | MIT |
| description | We report on the observation of the 36 GHz methanol maser line in the star-forming region DR21W to accurately measure the Zeeman effect. The Zeeman signature reported by Fish et al. became suspicious after an instrumental effect was discovered in the early days of the commissioning of the Very Large Array Wide-band Digital Architecture correlator. We conclude that the previously reported magnetic field strength of 58 mG (1.7 Hz mG[superscript –1]/z) is instrumental in nature and thus incorrect. With the improved performance of the array, we now deduce a 3σ limit of –4.7 to +0.4 mG (1.7 Hz mG[superscript –1]/z) for the line-of-sight component of the magnetic field strength in DR21W. |
| first_indexed | 2024-09-23T10:51:05Z |
| format | Article |
| id | mit-1721.1/95469 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:51:05Z |
| publishDate | 2015 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/954692022-09-30T23:25:42Z VERY LARGE ARRAY DETECTION OF THE 36 GHz ZEEMAN EFFECT IN DR21W REVISITED Momjian, Emmanuel Fish, Vincent L. Sjouwerman, Lorant O. Haystack Observatory Fish, Vincent L. We report on the observation of the 36 GHz methanol maser line in the star-forming region DR21W to accurately measure the Zeeman effect. The Zeeman signature reported by Fish et al. became suspicious after an instrumental effect was discovered in the early days of the commissioning of the Very Large Array Wide-band Digital Architecture correlator. We conclude that the previously reported magnetic field strength of 58 mG (1.7 Hz mG[superscript –1]/z) is instrumental in nature and thus incorrect. With the improved performance of the array, we now deduce a 3σ limit of –4.7 to +0.4 mG (1.7 Hz mG[superscript –1]/z) for the line-of-sight component of the magnetic field strength in DR21W. 2015-02-20T19:59:45Z 2015-02-20T19:59:45Z 2012-08 2012-06 Article http://purl.org/eprint/type/JournalArticle 0004-637X 1538-4357 http://hdl.handle.net/1721.1/95469 Momjian, Emmanuel, Lorant O. Sjouwerman, and Vincent L. Fish. “VERY LARGE ARRAY DETECTION OF THE 36 GHz ZEEMAN EFFECT IN DR21W REVISITED.” The Astrophysical Journal 757, no. 1 (August 31, 2012): 30. © 2012 The American Astronomical Society en_US http://dx.doi.org/10.1088/0004-637X/757/1/30 The Astrophysical Journal Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf IOP Publishing American Astronomical Society |
| spellingShingle | Momjian, Emmanuel Fish, Vincent L. Sjouwerman, Lorant O. VERY LARGE ARRAY DETECTION OF THE 36 GHz ZEEMAN EFFECT IN DR21W REVISITED |
| title | VERY LARGE ARRAY DETECTION OF THE 36 GHz ZEEMAN EFFECT IN DR21W REVISITED |
| title_full | VERY LARGE ARRAY DETECTION OF THE 36 GHz ZEEMAN EFFECT IN DR21W REVISITED |
| title_fullStr | VERY LARGE ARRAY DETECTION OF THE 36 GHz ZEEMAN EFFECT IN DR21W REVISITED |
| title_full_unstemmed | VERY LARGE ARRAY DETECTION OF THE 36 GHz ZEEMAN EFFECT IN DR21W REVISITED |
| title_short | VERY LARGE ARRAY DETECTION OF THE 36 GHz ZEEMAN EFFECT IN DR21W REVISITED |
| title_sort | very large array detection of the 36 ghz zeeman effect in dr21w revisited |
| url | http://hdl.handle.net/1721.1/95469 |
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