| Télécharger | - Voir la version finale : The JCMT BISTRO Survey: evidence for pinched magnetic fields in quiescent filaments of NGC 1333 (PDF, 1 Mo)
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| DOI | Trouver le DOI : https://doi.org/10.3847/2041-8213/ac3cc1 |
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| Auteur | Rechercher : Doi, YasuoIdentifiant ORCID : https://orcid.org/0000-0001-8746-6548; Rechercher : Tomisaka, KohjiIdentifiant ORCID : https://orcid.org/0000-0003-2726-0892; Rechercher : Hasegawa, TetsuoIdentifiant ORCID : https://orcid.org/0000-0003-1853-0184; Rechercher : Coudé, SimonIdentifiant ORCID : https://orcid.org/0000-0002-0859-0805; Rechercher : Arzoumanian, Doris; Rechercher : Bastien, PierreIdentifiant ORCID : https://orcid.org/0000-0002-0794-3859; Rechercher : Matsumura, MasafumiIdentifiant ORCID : https://orcid.org/0000-0002-6906-0103; Rechercher : Tahani, Mehrnoosh1Identifiant ORCID : https://orcid.org/0000-0001-8749-1436; Rechercher : Sadavoy, SarahIdentifiant ORCID : https://orcid.org/0000-0001-7474-6874; Rechercher : Hull, Charles L. H.Identifiant ORCID : https://orcid.org/0000-0002-8975-7573; Rechercher : Johnstone, DougIdentifiant ORCID : https://orcid.org/0000-0002-6773-459X; Rechercher : Di Francesco, James1Identifiant ORCID : https://orcid.org/0000-0002-9289-2450; Rechercher : Shimajiri, YoshitoIdentifiant ORCID : https://orcid.org/0000-0001-9368-3143; Rechercher : Furuya, Ray S.Identifiant ORCID : https://orcid.org/0000-0003-0646-8782; Rechercher : Kwon, JungmiIdentifiant ORCID : https://orcid.org/0000-0003-2815-7774; Rechercher : Tamura, MotohideIdentifiant ORCID : https://orcid.org/0000-0002-6510-0681; Rechercher : Ward-Thompson, DerekIdentifiant ORCID : https://orcid.org/0000-0003-1140-2761; Rechercher : Le Gouellec, Valentin J. M.Identifiant ORCID : https://orcid.org/0000-0002-5714-799X; Rechercher : Hoang, ThiemIdentifiant ORCID : https://orcid.org/0000-0003-2017-0982; Rechercher : Kirchschlager, FlorianIdentifiant ORCID : https://orcid.org/0000-0002-3036-0184; Rechercher : Hwang, JihyeIdentifiant ORCID : https://orcid.org/0000-0001-7866-2686; Rechercher : Eswaraiah, ChakaliIdentifiant ORCID : https://orcid.org/0000-0003-4761-6139; Rechercher : Koch, Patrick M.Identifiant ORCID : https://orcid.org/0000-0003-2777-5861; Rechercher : Whitworth, Anthony P.Identifiant ORCID : https://orcid.org/0000-0002-1178-5486; Rechercher : Pattle, KateIdentifiant ORCID : https://orcid.org/0000-0002-8557-3582; Rechercher : Kwon, WoojinIdentifiant ORCID : https://orcid.org/0000-0003-4022-4132; Rechercher : Kang, Jihyun; Rechercher : Inutsuka, Shu-ichiroIdentifiant ORCID : https://orcid.org/0000-0003-4366-6518; Rechercher : Bourke, Tyler L.Identifiant ORCID : https://orcid.org/0000-0001-7491-0048; Rechercher : Tang, XindiIdentifiant ORCID : https://orcid.org/0000-0002-4154-4309; Rechercher : Fanciullo, LapoIdentifiant ORCID : https://orcid.org/0000-0001-9930-9240; Rechercher : Lee, Chang WonIdentifiant ORCID : https://orcid.org/0000-0002-3179-6334; Rechercher : Liu, Hong-LiIdentifiant ORCID : https://orcid.org/0000-0003-3343-9645; Rechercher : Lyo, A-RanIdentifiant ORCID : https://orcid.org/0000-0002-9907-8427; Rechercher : Qiu, KepingIdentifiant ORCID : https://orcid.org/0000-0002-5093-5088; Rechercher : Lai, Shih-PingIdentifiant ORCID : https://orcid.org/0000-0001-5522-486X |
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| Affiliation du nom | - Conseil national de recherches du Canada. Herzberg en astronomie et en astrophysique
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| Bailleur de fonds | Rechercher : The National Key R&D Program of China; Rechercher : National Natural Science Foundation of China; Rechercher : Grants-in-Aid for Scientific Research; Rechercher : Academist; Rechercher : JSPS KAKENHI grants; Rechercher : The Ministry of Science and Technology of Taiwan; Rechercher : Academia Sinica |
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| Format | Texte, Article |
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| Description physique | 12 p. |
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| Sujet | interstellar medium; interstellar magnetic fields; interstellar filaments; star formation; polarimetry; submillimeter astronomy |
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| Résumé | We investigate the internal 3D magnetic structure of dense interstellar filaments within NGC 1333 using polarization data at 850 μm from the B-fields In STar-forming Region Observations survey at the James Clerk Maxwell Telescope. Theoretical models predict that the magnetic field lines in a filament will tend to be dragged radially inward (i.e., pinched) toward the central axis due to the filament's self-gravity. We study the cross-sectional profiles of the total intensity (I) and polarized intensity (PI) of dust emission in four segments of filaments unaffected by local star formation that are expected to retain a pristine magnetic field structure. We find that the filaments' FWHMs in PI are not the same as those in I, with two segments being appreciably narrower in PI (FWHM ratio ≃0.7–0.8) and one segment being wider (FWHM ratio ≃1.3). The filament profiles of the polarization fraction (P) do not show a minimum at the spine of the filament, which is not in line with an anticorrelation between P and I normally seen in molecular clouds and protostellar cores. Dust grain alignment variation with density cannot reproduce the observed P distribution. We demonstrate numerically that the I and PI cross-sectional profiles of filaments in magnetohydrostatic equilibrium will have differing relative widths depending on the viewing angle. The observed variations of FWHM ratios in NGC 1333 are therefore consistent with models of pinched magnetic field structures inside filaments, especially if they are magnetically near-critical or supercritical. |
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| Date de publication | 2021-12-08 |
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| Maison d’édition | IOP |
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| Licence | |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 418d1d3b-1f79-467b-84dc-8bdb918dcbfd |
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| Enregistrement créé | 2022-11-09 |
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| Enregistrement modifié | 2022-11-09 |
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