Compressed Magnetic Field in the Magnetically Regulated Global Collapsing Clump of G9.62+0.19
Liu, Tie1,2; Kim, Kee-Tae1; Liu, Sheng-Yuan3; Juvela, Mika4; Zhang, Qizhou5; Wu, Yuefang6; Li, Pak Shing7; Parsons, Harriet2; Soam, Archana1,8; Goldsmith, Paul F.9; Su, Yu-Nung3; Tatematsu, Ken'ichi10; Qin, Sheng-Li11,12; Garay, Guido13; Hirota, Tomoya10; Wouterloot, Jan2; Chen, Huei-Ru14,15; Evans, Neal J., II1,16; Graves, Sarah2; Kang, Sung-Ju1; Li, Di17,18; Mardones, Diego13,19; Rawlings, Mark G.2; Ren, Zhiyuan17; Wang, Ke20,21
Corresponding AuthorLiu, Tie(
AbstractHow stellar feedback from high-mass stars (e.g., H II regions) influences the surrounding interstellar medium and regulates new star formation is still unclear. To address this question, we observed the G9.62+0.19 complex in 850 mu m continuum with the James Clerk Maxwell Telescope/POL-2 polarimeter. An ordered magnetic field has been discovered in its youngest clump, the G9.62 clump. The magnetic field strength is determined to be similar to 1 mG. Magnetic field plays a larger role than turbulence in supporting the clump. However, the G9.62 clump is still unstable against gravitational collapse even if thermal, turbulent, and magnetic field support are taken into account together. The magnetic field segments in the outskirts of the G9.62 clump seem to point toward the clump center, resembling a dragged-in morphology, indicating that the clump is likely undergoing magnetically regulated global collapse. However, the magnetic field in its central region is aligned with the shells of the photodissociation regions and is approximately parallel to the ionization (or shock) front, indicating that the magnetic field therein is likely compressed by the expanding H II regions that formed in the same complex.
KeywordISM: magnetic fields
Indexed BySCI
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000452385800005
Citation statistics
Document Type期刊论文
Corresponding AuthorLiu, Tie
Affiliation1.Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055, South Korea
2.East Asian Observ, 660 North Aohoku Pl, Hilo, HI 96720 USA
3.Acad Sinica, Inst Astron & Astrophys, POB 23-141, Taipei 106, Taiwan
4.Univ Helsinki, Dept Phys, POB 64, FI-00014 Helsinki, Finland
5.Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA
6.Peking Univ, Dept Astron, Beijing 100871, Peoples R China
7.Univ Calif Berkeley, Astron Dept, Berkeley, CA 94720 USA
8.NASA, Ames Res Ctr, USRA, SOFIA Sci Ctr, N232, Moffett Field, CA 94035 USA
9.CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA
10.Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
11.Yunnan Univ, Dept Astron, Kunming 650091, Yunnan, Peoples R China
12.Key Lab Astroparticle Phys Yunnan Prov, Kunming 650091, Yunnan, Peoples R China
13.Univ Chile, Dept Astron, Casilla 36-D, Santiago, Chile
14.Natl Tsing Hua Univ, Inst Astron, Hsinchu, Taiwan
15.Natl Tsing Hua Univ, Dept Phys, Hsinchu, Taiwan
16.Univ Texas Austin, Dept Astron, 2515 Speedway,Stop C1400, Austin, TX 78712 USA
17.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
18.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
19.Max Planck Inst Extraterr Phys, Ctr Astrochem Studies, Giessenbachstr 1, D-85748 Garching, Germany
20.Peking Univ, Kavli Inst Astron & Astrophys, 5 Yiheyuan Rd, Beijing 100871, Peoples R China
21.European Southern Observ ESO Headquarters, Karl Schwarzschild Str 2, D-85748 Garching, Germany
Recommended Citation
GB/T 7714
Liu, Tie,Kim, Kee-Tae,Liu, Sheng-Yuan,et al. Compressed Magnetic Field in the Magnetically Regulated Global Collapsing Clump of G9.62+0.19[J]. ASTROPHYSICAL JOURNAL LETTERS,2018,869(1):6.
APA Liu, Tie.,Kim, Kee-Tae.,Liu, Sheng-Yuan.,Juvela, Mika.,Zhang, Qizhou.,...&Wang, Ke.(2018).Compressed Magnetic Field in the Magnetically Regulated Global Collapsing Clump of G9.62+0.19.ASTROPHYSICAL JOURNAL LETTERS,869(1),6.
MLA Liu, Tie,et al."Compressed Magnetic Field in the Magnetically Regulated Global Collapsing Clump of G9.62+0.19".ASTROPHYSICAL JOURNAL LETTERS 869.1(2018):6.
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