dc.contributor.author | BISTRO | |
dc.date.accessioned | 2019-08-01T16:19:22Z | |
dc.date.available | 2019-08-01T16:19:22Z | |
dc.date.issued | 2019-05-29 | |
dc.identifier.citation | BISTRO 2019 , ' The JCMT BISTRO Survey : The Magnetic Field of the Barnard 1 Star-Forming Region ' , The Astrophysical Journal , vol. 877 , no. 2 , 88 . https://doi.org/10.3847/1538-4357/ab1b23 | |
dc.identifier.issn | 0004-637X | |
dc.identifier.other | PURE: 16669962 | |
dc.identifier.other | PURE UUID: 00c1ad84-3f66-4381-8d1a-cc034b90e422 | |
dc.identifier.other | ArXiv: http://arxiv.org/abs/1904.07221v2 | |
dc.identifier.other | Scopus: 85068818980 | |
dc.identifier.other | ORCID: /0000-0002-2859-4600/work/62748439 | |
dc.identifier.uri | http://hdl.handle.net/2299/21535 | |
dc.description | 22 pages, 7 figures, accepted in the Astrophysical Journal | |
dc.description.abstract | We present the POL-2 850 μm linear polarization map of the Barnard 1 clump in the Perseus molecular cloud complex from the B-fields In STar-forming Region Observations survey at the James Clerk Maxwell Telescope. We find a trend of decreasing polarization fraction as a function of total intensity, which we link to depolarization effects toward higher-density regions of the cloud. We then use the polarization data at 850 μm to infer the plane-of-sky orientation of the large-scale magnetic field in Barnard 1. This magnetic field runs north-south across most of the cloud, with the exception of B1-c, where it turns more east-west. From the dispersion of polarization angles, we calculate a turbulence correlation length of 5.0 ±2.″5 (1500 au) and a turbulent-to-total magnetic energy ratio of 0.5 ±0.3 inside the cloud. We combine this turbulent-to-total magnetic energy ratio with observations of NH 3 molecular lines from the Green Bank Ammonia Survey to estimate the strength of the plane-of-sky component of the magnetic field through the Davis-Chandrasekhar-Fermi method. With a plane-of-sky amplitude of 120 ±60 μG and a criticality criterion λ c = 3.0 ±1.5, we find that Barnard 1 is a supercritical molecular cloud with a magnetic field nearly dominated by its turbulent component. | en |
dc.format.extent | 17 | |
dc.language.iso | eng | |
dc.relation.ispartof | The Astrophysical Journal | |
dc.subject | ISM: clouds | |
dc.subject | ISM: individual objects (Barnard 1) | |
dc.subject | ISM: magnetic fields | |
dc.subject | polarization | |
dc.subject | stars: formation | |
dc.subject | submillimeter: ISM | |
dc.subject | Astronomy and Astrophysics | |
dc.subject | Space and Planetary Science | |
dc.title | The JCMT BISTRO Survey : The Magnetic Field of the Barnard 1 Star-Forming Region | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Centre for Astrophysics Research | |
dc.contributor.institution | Registry | |
dc.contributor.institution | School of Physics, Engineering & Computer Science | |
dc.contributor.institution | Department of Physics, Astronomy and Mathematics | |
dc.description.status | Peer reviewed | |
dc.identifier.url | http://www.scopus.com/inward/record.url?scp=85068818980&partnerID=8YFLogxK | |
rioxxterms.version | AM | |
rioxxterms.versionofrecord | https://doi.org/10.3847/1538-4357/ab1b23 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |