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dc.contributor.authorWang, J-W
dc.contributor.authorLai, S-P
dc.contributor.authorEswaraiah, C
dc.contributor.authorPattle, K
dc.contributor.authorDi Francesco, J
dc.contributor.authorJohnstone, D
dc.contributor.authorKoch, PM
dc.contributor.authorLiu, T
dc.contributor.authorTamura, M
dc.contributor.authorFuruya, RS
dc.contributor.authorOnaka, T
dc.contributor.authorWard-Thompson, D
dc.contributor.authorSoam, A
dc.contributor.authorKim, K-T
dc.contributor.authorLee, CW
dc.contributor.authorMairs, S
dc.contributor.authorArzoumanian, D
dc.contributor.authorKim, G
dc.contributor.authorHoang, T
dc.contributor.authorHwang, J
dc.contributor.authorLiu, S-Y
dc.contributor.authorBerry, D
dc.contributor.authorBastien, P
dc.contributor.authorHasegawa, T
dc.contributor.authorKwon, W
dc.contributor.authorQiu, K
dc.contributor.authorAndre, P
dc.contributor.authorAso, Y
dc.contributor.authorByun, D-Y
dc.contributor.authorChen, H-RV
dc.contributor.authorChen, MC
dc.contributor.authorChen, WP
dc.contributor.authorChing, T-C
dc.contributor.authorCho, J
dc.contributor.authorChoi, M
dc.contributor.authorChrysostomou, A
dc.contributor.authorChung, EJ
dc.contributor.authorCoudé, S
dc.contributor.authorDoi, Y
dc.contributor.authorDowell, CD
dc.contributor.authorDrabek-Maunder, E
dc.contributor.authorEyres, SP
dc.contributor.authorFalle, S
dc.contributor.authorFanciullo, L
dc.contributor.authorFiege, J
dc.contributor.authorFranzmann, E
dc.contributor.authorFriberg, P
dc.contributor.authorFriesen, RK
dc.contributor.authorFuller, GA
dc.contributor.authorGledhill, TM
dc.contributor.authorGraves, SF
dc.contributor.authorGreaves, JS
dc.contributor.authorGriffin, M
dc.contributor.authorGu, Q
dc.contributor.authorHatchell, J
dc.contributor.authorHayashi, S
dc.contributor.authorHolland, W
dc.contributor.authorHoude, M
dc.contributor.authorInoue, T
dc.contributor.authorInutsuka, S-I
dc.contributor.authorIwasaki, K
dc.contributor.authorJeong, I-G
dc.contributor.authorKanamori, Y
dc.contributor.authorKataoka, A
dc.contributor.authorKawabata, KS
dc.contributor.authorKang, J-H
dc.contributor.authorKang, M
dc.contributor.authorKang, S-J
dc.contributor.authorKemper, F
dc.contributor.authorKim, J
dc.contributor.authorKim, KH
dc.contributor.authorKim, M-R
dc.contributor.authorKim, S
dc.contributor.authorKirk, J
dc.contributor.authorKobayashi, MI
dc.contributor.authorKwon, J
dc.contributor.authorLacaille, KM
dc.contributor.authorLee, J-E
dc.contributor.authorLee, S-S
dc.contributor.authorLi, D
dc.contributor.authorLi, D
dc.contributor.authorLi, H-B
dc.contributor.authorLiu, H
dc.contributor.authorLiu, J
dc.contributor.authorLyo, A
dc.contributor.authorMatsumura, M
dc.contributor.authorMatthews, B
dc.contributor.authorMoriarty-Schieven, GH
dc.contributor.authorNagata, T
dc.contributor.authorNakamura, F
dc.contributor.authorNakanishi, H
dc.contributor.authorOhashi, N
dc.contributor.authorParsons, HA
dc.contributor.authorPeretto, N
dc.contributor.authorPon, A
dc.contributor.authorPyo, T-S
dc.contributor.authorQian, L
dc.contributor.authorRao, R
dc.contributor.authorRawlings, MG
dc.contributor.authorRetter, B
dc.contributor.authorRicher, J
dc.contributor.authorRigby, A
dc.contributor.authorRobitaille, J-F
dc.contributor.authorSadavoy, SI
dc.contributor.authorSaito, H
dc.contributor.authorSavini, G
dc.contributor.authorScaife, AM
dc.contributor.authorSeta, M
dc.contributor.authorShinnaga, H
dc.contributor.authorTang, Y-W
dc.contributor.authorTomisaka, K
dc.contributor.authorTsukamoto, Y
dc.contributor.authorVan Loo, S
dc.contributor.authorWang, H
dc.contributor.authorWhitworth, AP
dc.contributor.authorYen, H-W
dc.contributor.authorYoo, H
dc.contributor.authorYuan, J
dc.contributor.authorZenko, T
dc.contributor.authorZhang, C-P
dc.contributor.authorZhang, G
dc.contributor.authorZhou, J
dc.contributor.authorZhu, L
dc.date.accessioned2019-04-10T09:26:34Z
dc.date.issued2019-05-01
dc.description.abstractWe present the 850 μm polarization observations toward the IC5146 filamentary cloud taken using the Submillimetre Common-User Bolometer Array 2 (SCUBA-2) and its associated polarimeter (POL-2), mounted on the James Clerk Maxwell Telescope (JCMT), as part of the B-fields In STar forming Regions Observations (BISTRO). This work is aimed at revealing the magnetic field morphology within a core-scale (≲1.0 pc) hub-filament structure (HFS) located at the end of a parsec-scale filament. To investigate whether or not the observed polarization traces the magnetic field in the HFS, we analyze the dependence between the observed polarization fraction and total intensity using a Bayesian approach with the polarization fraction described by the Rice likelihood function, which can correctly describe the probability density function (PDF) of the observed polarization fraction for low signal-to-noise ratio (SNR) data. We find a power-law dependence between the polarization fraction and total intensity with an index of 0.56 in AV∼ 20--300 mag regions, suggesting that the dust grains in these dense regions can still be aligned with magnetic fields in the IC5146 regions. Our polarization maps reveal a curved magnetic field, possibly dragged by the contraction along the parsec-scale filament. We further obtain a magnetic field strength of 0.5±0.2 mG toward the central hub using the Davis-Chandrasekhar-Fermi method, corresponding to a mass-to-flux criticality of ∼ 1.3±0.4 and an Alfvénic Mach number of <0.6. These results suggest that gravity and magnetic field is currently of comparable importance in the HFS, and turbulence is less important.en_GB
dc.description.sponsorshipMinistry of Science and Technology (MOST) of Taiwanen_GB
dc.description.sponsorshipNational Research Foundation of Korea (NRF)en_GB
dc.description.sponsorshipNational Research Council of Canadaen_GB
dc.description.sponsorshipNatural Sciences and Engineering Research Council of Canada (NSERC)en_GB
dc.identifier.citationVol. 876 (42). Published online 01 May 2019.en_GB
dc.identifier.doi10.3847/1538-4357/ab13a2
dc.identifier.grantnumber105-2119-M- 007-021-MY3en_GB
dc.identifier.grantnumber105-2119-M-007-024en_GB
dc.identifier.grantnumber105-2119-M- 007-022-MY3en_GB
dc.identifier.grantnumberNRF-2015R1C1A1A01052160en_GB
dc.identifier.grantnumberNRF-2016R1A2B4012593en_GB
dc.identifier.urihttp://hdl.handle.net/10871/36776
dc.language.isoenen_GB
dc.publisherAmerican Astronomical Society / IOP Publishingen_GB
dc.rights© 2019. The American Astronomical Society. All rights reserved.
dc.subjectradio continuum: ISMen_GB
dc.subjectPolarizationen_GB
dc.subjectISM: individual objects (IC5146)en_GB
dc.subjectISM: magnetic fieldsen_GB
dc.subjectISM: structureen_GB
dc.subjectstars: formationen_GB
dc.titleJCMT BISTRO survey: Magnetic Fields within the Hub-Filament Structure in IC 5146en_GB
dc.typeArticleen_GB
dc.date.available2019-04-10T09:26:34Z
dc.descriptionThis is the final version. Available from American Astronomical Society / IOP Publishing via the DOI in this record.en_GB
dc.identifier.eissn1538-4357
dc.identifier.journalAstrophysical Journalen_GB
dc.rights.urihttp://www.rioxx.net/licenses/all-rights-reserveden_GB
dcterms.dateAccepted2019-03-25
rioxxterms.versionVoRen_GB
rioxxterms.licenseref.startdate2019-03-25
rioxxterms.typeJournal Article/Reviewen_GB
refterms.dateFCD2019-04-10T09:15:28Z
refterms.versionFCDAM
refterms.panelBen_GB


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