Spectropolarimetry of the Classical T Tauri Star T Tauri
High-resolution (R 60,000) circular spectropolarimetry of the classical T Tauri star T Tau is presented. The star was observed on 1997 November 21 and 22. Analyzing 12 photospheric absorption lines, the mean longitudinal magnetic field is found to be Bz = 12 ± 35 G. The 3 s upper limit of |Bz|
Gespeichert in:
| Veröffentlicht in: | The Astronomical journal 2006-01, Vol.131 (1), p.520-526 |
|---|---|
| Hauptverfasser: | , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext bestellen |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | 526 |
|---|---|
| container_issue | 1 |
| container_start_page | 520 |
| container_title | The Astronomical journal |
| container_volume | 131 |
| creator | Daou, Antoun G Johns-Krull, Christopher M Valenti, Jeff A |
| description | High-resolution (R 60,000) circular spectropolarimetry of the classical T Tauri star T Tau is presented. The star was observed on 1997 November 21 and 22. Analyzing 12 photospheric absorption lines, the mean longitudinal magnetic field is found to be Bz = 12 ± 35 G. The 3 s upper limit of |Bz| |
| doi_str_mv | 10.1086/498306 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_O3W</sourceid><recordid>TN_cdi_proquest_miscellaneous_20596938</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>20596938</sourcerecordid><originalsourceid>FETCH-LOGICAL-c347t-781702988285c77af333170182dc40bc1f5dbe630c3212d9efe294e3bb135b363</originalsourceid><addsrcrecordid>eNp9kE1LxDAQhoMouK76G-pFQahmMmk7OcriFyx42PUc0jTBStfUpHvYf2-XVfSgHoaZd3gYmIexU-BXwKm8loqQl3tsAgVSjkSw_2M-ZEcpvXIOQFxOGC16Z4cY-tCZ2K7cEDdZ8Nnw4rJZZ1JqremyZbY069hmi8HEr3DMDrzpkjv57FP2fHe7nD3k86f7x9nNPLcoqyGvCCouFJGgwlaV8Yg4boBEYyWvLfiiqV2J3KIA0SjnnVDSYV0DFjWWOGUXu7t9DO9rlwa9apN1XWfeXFgnXUmUJUpQI3n-Lyl4oUqF9A3aGFKKzut-fN3EjQautwr1TuEInu3ANvR_M5e_MKNtvbWtAcfSheC6bzx-AKisd4k</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>20596938</pqid></control><display><type>article</type><title>Spectropolarimetry of the Classical T Tauri Star T Tauri</title><source>IOP Publishing Free Content</source><creator>Daou, Antoun G ; Johns-Krull, Christopher M ; Valenti, Jeff A</creator><creatorcontrib>Daou, Antoun G ; Johns-Krull, Christopher M ; Valenti, Jeff A</creatorcontrib><description>High-resolution (R 60,000) circular spectropolarimetry of the classical T Tauri star T Tau is presented. The star was observed on 1997 November 21 and 22. Analyzing 12 photospheric absorption lines, the mean longitudinal magnetic field is found to be Bz = 12 ± 35 G. The 3 s upper limit of |Bz| <= 105 G. Previously, T Tau was reported to have a mean longitudinal field of 160 ± 40 G. A strong mean magnetic field (~2.4 kG) has been reported on the surface of T Tau based on Zeeman broadening measurements in unpolarized light. The present observations indicate that it is very unlikely that this field is dipolar in nature. In order to verify the observing techniques and analysis methods used on T Tau, spectra of the Sun obtained by observing the asteroid Vesta are analyzed in the same fashion. Here the mean longitudinal field is Bz = -4 ± 3 G, which is well within the limits of previous observations. As a further check on our results, we also present data for the magnetic Ap star 53 Cam, which gives a mean longitudinal magnetic field that agrees well with the published field variations for this star.</description><identifier>ISSN: 1538-3881</identifier><identifier>ISSN: 0004-6256</identifier><identifier>EISSN: 1538-3881</identifier><identifier>DOI: 10.1086/498306</identifier><language>eng</language><publisher>IOP Publishing</publisher><ispartof>The Astronomical journal, 2006-01, Vol.131 (1), p.520-526</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c347t-781702988285c77af333170182dc40bc1f5dbe630c3212d9efe294e3bb135b363</citedby><cites>FETCH-LOGICAL-c347t-781702988285c77af333170182dc40bc1f5dbe630c3212d9efe294e3bb135b363</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.1086/498306/pdf$$EPDF$$P50$$Giop$$H</linktopdf><link.rule.ids>314,776,780,1547,27607,27903,27904,53882,53909</link.rule.ids><linktorsrc>$$Uhttp://iopscience.iop.org/1538-3881/131/1/520$$EView_record_in_IOP_Publishing$$FView_record_in_$$GIOP_Publishing</linktorsrc></links><search><creatorcontrib>Daou, Antoun G</creatorcontrib><creatorcontrib>Johns-Krull, Christopher M</creatorcontrib><creatorcontrib>Valenti, Jeff A</creatorcontrib><title>Spectropolarimetry of the Classical T Tauri Star T Tauri</title><title>The Astronomical journal</title><description>High-resolution (R 60,000) circular spectropolarimetry of the classical T Tauri star T Tau is presented. The star was observed on 1997 November 21 and 22. Analyzing 12 photospheric absorption lines, the mean longitudinal magnetic field is found to be Bz = 12 ± 35 G. The 3 s upper limit of |Bz| <= 105 G. Previously, T Tau was reported to have a mean longitudinal field of 160 ± 40 G. A strong mean magnetic field (~2.4 kG) has been reported on the surface of T Tau based on Zeeman broadening measurements in unpolarized light. The present observations indicate that it is very unlikely that this field is dipolar in nature. In order to verify the observing techniques and analysis methods used on T Tau, spectra of the Sun obtained by observing the asteroid Vesta are analyzed in the same fashion. Here the mean longitudinal field is Bz = -4 ± 3 G, which is well within the limits of previous observations. As a further check on our results, we also present data for the magnetic Ap star 53 Cam, which gives a mean longitudinal magnetic field that agrees well with the published field variations for this star.</description><issn>1538-3881</issn><issn>0004-6256</issn><issn>1538-3881</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><recordid>eNp9kE1LxDAQhoMouK76G-pFQahmMmk7OcriFyx42PUc0jTBStfUpHvYf2-XVfSgHoaZd3gYmIexU-BXwKm8loqQl3tsAgVSjkSw_2M-ZEcpvXIOQFxOGC16Z4cY-tCZ2K7cEDdZ8Nnw4rJZZ1JqremyZbY069hmi8HEr3DMDrzpkjv57FP2fHe7nD3k86f7x9nNPLcoqyGvCCouFJGgwlaV8Yg4boBEYyWvLfiiqV2J3KIA0SjnnVDSYV0DFjWWOGUXu7t9DO9rlwa9apN1XWfeXFgnXUmUJUpQI3n-Lyl4oUqF9A3aGFKKzut-fN3EjQautwr1TuEInu3ANvR_M5e_MKNtvbWtAcfSheC6bzx-AKisd4k</recordid><startdate>20060101</startdate><enddate>20060101</enddate><creator>Daou, Antoun G</creator><creator>Johns-Krull, Christopher M</creator><creator>Valenti, Jeff A</creator><general>IOP Publishing</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>KL.</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>20060101</creationdate><title>Spectropolarimetry of the Classical T Tauri Star T Tauri</title><author>Daou, Antoun G ; Johns-Krull, Christopher M ; Valenti, Jeff A</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c347t-781702988285c77af333170182dc40bc1f5dbe630c3212d9efe294e3bb135b363</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2006</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Daou, Antoun G</creatorcontrib><creatorcontrib>Johns-Krull, Christopher M</creatorcontrib><creatorcontrib>Valenti, Jeff A</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>The Astronomical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Daou, Antoun G</au><au>Johns-Krull, Christopher M</au><au>Valenti, Jeff A</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Spectropolarimetry of the Classical T Tauri Star T Tauri</atitle><jtitle>The Astronomical journal</jtitle><date>2006-01-01</date><risdate>2006</risdate><volume>131</volume><issue>1</issue><spage>520</spage><epage>526</epage><pages>520-526</pages><issn>1538-3881</issn><issn>0004-6256</issn><eissn>1538-3881</eissn><abstract>High-resolution (R 60,000) circular spectropolarimetry of the classical T Tauri star T Tau is presented. The star was observed on 1997 November 21 and 22. Analyzing 12 photospheric absorption lines, the mean longitudinal magnetic field is found to be Bz = 12 ± 35 G. The 3 s upper limit of |Bz| <= 105 G. Previously, T Tau was reported to have a mean longitudinal field of 160 ± 40 G. A strong mean magnetic field (~2.4 kG) has been reported on the surface of T Tau based on Zeeman broadening measurements in unpolarized light. The present observations indicate that it is very unlikely that this field is dipolar in nature. In order to verify the observing techniques and analysis methods used on T Tau, spectra of the Sun obtained by observing the asteroid Vesta are analyzed in the same fashion. Here the mean longitudinal field is Bz = -4 ± 3 G, which is well within the limits of previous observations. As a further check on our results, we also present data for the magnetic Ap star 53 Cam, which gives a mean longitudinal magnetic field that agrees well with the published field variations for this star.</abstract><pub>IOP Publishing</pub><doi>10.1086/498306</doi><tpages>7</tpages></addata></record> |
| fulltext | fulltext_linktorsrc |
| identifier | ISSN: 1538-3881 |
| ispartof | The Astronomical journal, 2006-01, Vol.131 (1), p.520-526 |
| issn | 1538-3881 0004-6256 1538-3881 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_20596938 |
| source | IOP Publishing Free Content |
| title | Spectropolarimetry of the Classical T Tauri Star T Tauri |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-24T07%3A38%3A56IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_O3W&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Spectropolarimetry%20of%20the%20Classical%20T%20Tauri%20Star%20T%20Tauri&rft.jtitle=The%20Astronomical%20journal&rft.au=Daou,%20Antoun%20G&rft.date=2006-01-01&rft.volume=131&rft.issue=1&rft.spage=520&rft.epage=526&rft.pages=520-526&rft.issn=1538-3881&rft.eissn=1538-3881&rft_id=info:doi/10.1086/498306&rft_dat=%3Cproquest_O3W%3E20596938%3C/proquest_O3W%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=20596938&rft_id=info:pmid/&rfr_iscdi=true |