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Dust polarized emis...
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Arzoumanian, DorisUniversidade do Porto,University of Porto
(author)
Dust polarized emission observations of NGC 6334: BISTRO reveals the details of the complex but organized magnetic field structure of the high-mass star-forming hub-filament network
- Article/chapterEnglish2021
Publisher, publication year, extent ...
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2021-03-11
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EDP Sciences,2021
Numbers
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LIBRIS-ID:oai:research.chalmers.se:9dee25be-5fe0-49fe-a6a5-a7a28c8c0f1f
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https://research.chalmers.se/publication/530619URI
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https://doi.org/10.1051/0004-6361/202038624DOI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:art swepub-publicationtype
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Subject category:ref swepub-contenttype
Notes
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Context. Molecular filaments and hubs have received special attention recently thanks to new studies showing their key role in star formation. While the (column) density and velocity structures of both filaments and hubs have been carefully studied, their magnetic field (B-field) properties have yet to be characterized. Consequently, the role of B-fields in the formation and evolution of hub-filament systems is not well constrained. Aims. We aim to understand the role of the B-field and its interplay with turbulence and gravity in the dynamical evolution of the NGC 6334 filament network that harbours cluster-forming hubs and high-mass star formation. Methods. We present new observations of the dust polarized emission at 850 μm toward the 2 pc × 10 pc map of NGC 6334 at a spatial resolution of 0.09 pc obtained with the James Clerk Maxwell Telescope (JCMT) as part of the B-field In STar-forming Region Observations (BISTRO) survey. We study the distribution and dispersion of the polarized intensity (PI), the polarization fraction (PF), and the plane-of-The-sky B-field angle (χB_POS) toward the whole region, along the 10 pc-long ridge and along the sub-filaments connected to the ridge and the hubs. We derived the power spectra of the intensity and χBPOS along the ridge crest and compared them with the results obtained from simulated filaments. Results. The observations span 3 orders of magnitude in Stokes I and PI and 2 orders of magnitude in PF (from 0.2 to 20%). A large scatter in PI and PF is observed for a given value of I. Our analyses show a complex B-field structure when observed over the whole region ( 10 pc); however, at smaller scales (1 pc), χBPOS varies coherently along the crests of the filament network. The observed power spectrum of χBPOS can be well represented with a power law function with a slope of-1.33 ± 0.23, which is 20% shallower than that of I. We find that this result is compatible with the properties of simulated filaments and may indicate the physical processes at play in the formation and evolution of star-forming filaments. Along the sub-filaments, χBPOS rotates frombeing mostly perpendicular or randomly oriented with respect to the crests to mostly parallel as the sub-filaments merge with the ridge and hubs. This variation of the B-field structure along the sub-filaments may be tracing local velocity flows of infalling matter in the ridge and hubs. Our analysis also suggests a variation in the energy balance along the crests of these sub-filaments, from magnetically critical or supercritical at their far ends to magnetically subcritical near the ridge and hubs. We also detect an increase in PF toward the high-column density (NH2 â 1023 cm-2) star cluster-forming hubs. These latter large PF values may be explained by the increase in grain alignment efficiency due to stellar radiation from the newborn stars, combined with an ordered B-field structure. Conclusions. These observational results reveal for the first time the characteristics of the small-scale (down to 0.1 pc) B-field structure of a 10 pc-long hub-filament system. Our analyses show variations in the polarization properties along the sub-filaments that may be tracing the evolution of their physical properties during their interaction with the ridge and hubs. We also detect an impact of feedback from young high-mass stars on the local B-field structure and the polarization properties, which could put constraints on possible models for dust grain alignment and provide important hints as to the interplay between the star formation activity and interstellar B-fields.
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Furuya, Ray S.Tokushima University
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Hasegawa, TetsuoNational Astronomical Observatory of Japan
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Tahani, M.National Research Council Canada
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Sadavoy, S. I.Queen's University
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Hull, Charles L. H.National Astronomical Observatory of Japan
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Johnstone, D.National Research Council Canada
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Koch, Patrick M.Academia Sinica Taiwan
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Inutsuka, Shu-IchiroNagoya University
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Doi, YasuoUniversity of Tokyo, Japan
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Hoang, ThiemKorea Astronomy and Space Science Institute
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Onaka, TakashiUniversity of Tokyo, Japan,Meisei University
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Iwasaki, KazunariNational Astronomical Observatory of Japan
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Shimajiri, YoshitoNational Astronomical Observatory of Japan
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Inoue, TsuyoshiNagoya University
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Peretto, NicolasCardiff University
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André, P.Université Paris-Saclay,University Paris-Saclay
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Bastien, PierreUniversité de Montréal
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Berry, DavidEast Asian Observatory
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Chen, Huei-Ru VivienAcademia Sinica Taiwan
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Di Francesco, J.National Research Council Canada
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Eswaraiah, ChakaliChinese Academy of Sciences
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Fanciullo, LapoAcademia Sinica Taiwan
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Fissel, Laura M.Queen's University
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Hwang, JihyeKorea Astronomy and Space Science Institute
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Kang, Ji-hyunKorea Astronomy and Space Science Institute
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Kim, GwanjeongNational Astronomical Observatory of Japan
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Kim, Kee-TaeKorea Astronomy and Space Science Institute
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Kirchschlager, F.University College London (UCL)
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Kwon, WoojinSeoul National University
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Lee, C.W.Korea Astronomy and Space Science Institute
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Liu, Hong-LiYunnan University
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Lyo, A.Korea Astronomy and Space Science Institute
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Pattle, KateNational University of Ireland
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Soam, ArchanaUniversities Space Research Association
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Tang, X. D.Chinese Academy of Sciences
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Whitworth, AnthonyCardiff University
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Ching, Tao-ChungChinese Academy of Sciences
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Coudé, SimonUniversities Space Research Association
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Wang, Jia-WeiAcademia Sinica Taiwan
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Ward-Thompson, D.University of Central Lancashire
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Lai, Shih-PingAcademia Sinica Taiwan
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Qiu, KepingNanjing University
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Bourke, T. L.SKA Organisation
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Byun, Do YoungKorea Astronomy and Space Science Institute
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Chen, Michael Chun-YuanUniversity of Victoria
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Chen, ZhiweiChinese Academy of Sciences
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Chen, Wen PingNational Central University
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Cho, JungyeonChungnam National University
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Choi, YunheeKorea Astronomy and Space Science Institute
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Choi, MinhoKorea Astronomy and Space Science Institute
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Chrysostomou, A.SKA Organisation
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Chung, Eun JungChungnam National University
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Dai, SophiaChinese Academy of Sciences
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Diep, Pham NgocVietnam Academy of Science and Technology
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Duan, Hao-YuanNational Tsing Hua University
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Duan, YanChinese Academy of Sciences
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Eden, D. J.Liverpool John Moores University
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Fiege, J.University of Manitoba
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Franzmann, EricaUniversity of Manitoba
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Friberg, P.East Asian Observatory
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Fuller, G. A.University of Manchester
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Gledhill, T.University of Hertfordshire
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Graves, Sarah F.East Asian Observatory
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Greaves, J. S.Cardiff University
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Griffin, MattCardiff University
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Gu, QilaoChinese University of Hong Kong
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Han, IlseungKorea Astronomy and Space Science Institute
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Hatchell, J.University of Exeter
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Hayashi, S.National Astronomical Observatory of Japan
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Jeong, Il-GyoKorea Astronomy and Space Science Institute
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Kang, MijuKorea Astronomy and Space Science Institute
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Kang, Sung-JuKorea Astronomy and Space Science Institute
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Kataoka, AkimasaNational Astronomical Observatory of Japan
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Kawabata, K.Hiroshima University
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Kemper, F.Academia Sinica Taiwan
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Kim, Mi-RyangKorea Astronomy and Space Science Institute
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Kim, Kyoung HeeKorea Astronomy and Space Science Institute
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Kim, JongsooKorea Astronomy and Space Science Institute
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Kim, ShinyoungKorea Astronomy and Space Science Institute
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Kirk, J.University of Central Lancashire
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Kobayashi, Masato I. N.Tohoku University
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Konyves, VeraUniversity of Central Lancashire
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Kusune, TakayoshiNational Astronomical Observatory of Japan
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Kwon, JungmiUniversity of Tokyo, Japan
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Lacaille, KevinMcMaster University
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Law, Chi Yan,1990Chalmers tekniska högskola,Chalmers University of Technology,Chinese University of Hong Kong(Swepub:cth)ychi
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Lee, Chin-FeiAcademia Sinica Taiwan
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Lee, Yong-HeeEast Asian Observatory
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Lee, Sang SungKorea Astronomy and Space Science Institute
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Lee, H.Chungnam National University
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Lee, Jeong EunKyung Hee University
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Li, Hua-BaiChinese University of Hong Kong
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Li, D.Chinese Academy of Sciences
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Li, DaleiChinese Academy of Sciences
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Liu, J.Nanjing University
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Liu, TieShanghai Astronomical Observatory. Chinese Academy of Sciences,Shanghai Astronomical Observatory Chinese Academy of Sciences
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Liu, Sheng-YuanAcademia Sinica Taiwan
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Lu, X.National Astronomical Observatory of Japan
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Mairs, SteveEast Asian Observatory
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Matsumura, MasafumiKagawa University
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Matthews, B. C.National Research Council Canada
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Moriarty-Schieven, Gerald H.National Research Council Canada
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Nagata, TetsuyaKyoto University
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Nakamura, FumitakaNational Astronomical Observatory of Japan
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Nakanishi, HiroyukiKagoshima University
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Ngoc, Nguyen BichVietnam Academy of Science and Technology
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Ohashi, NagayoshiNational Astronomical Observatory of Japan
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Park, G.Korea Astronomy and Space Science Institute
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Parsons, HarrietEast Asian Observatory
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Pyo, Tae-SooNational Astronomical Observatory of Japan
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Qian, LeiChinese Academy of Sciences
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Rao, R.Academia Sinica Taiwan
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Rawlings, J. M.C.University College London (UCL)
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Rawlings, M.G.East Asian Observatory
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Retter, BrendanCardiff University
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Richer, J.University Of Cambridge
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Rigby, AndrewCardiff University
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Saito, HiroUniversity of Tsukuba
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Savini, G.University College London (UCL)
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Scaife, A. M. M.University of Manchester
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Seta, MasumichiKwansei Gakuin University
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Shinnaga, H.Kagoshima University
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Tamura, MotohideNational Astronomical Observatory of Japan
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Tang, Ya-WenAcademia Sinica Taiwan
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Tomisaka, KohjiNational Astronomical Observatory of Japan
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Ngoc Tram, LeVietnam Academy of Science and Technology
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Tsukamoto, YusukeKagoshima University
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Viti, SerenaUniversity College London (UCL)
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Wang, HongchiChinese Academy of Sciences
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Xie, JinjinChinese Academy of Sciences
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Yen, Hsi-WeiAcademia Sinica Taiwan
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Yoo, HyunjuKorea Astronomy and Space Science Institute
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Yuan, JinghuaChinese Academy of Sciences
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Yun, Hyeong-SikKyung Hee University
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Zenko, TetsuyaKyoto University
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Zhang, GuoyinChinese Academy of Sciences
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Zhang, Chuan-PengChinese Academy of Sciences
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Zhang, YapengChinese University of Hong Kong
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Zhou, JianjunChinese Academy of Sciences
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Zhu, LeiChinese Academy of Sciences
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De Looze, I.University College London (UCL)
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Dowell, C. D.
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Eyres, S.University of South Wales
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Friesen, R.National Radio Astronomy Observatory
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Robitaille, Jean-FrançoisUniversité Grenoble Alpes,Grenoble Alpes University
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Van Loo, SvenUniversity of Leeds
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Universidade do PortoTokushima University
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