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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Compressed Magnetic Field in the Magnetically Regulated Global Collapsing Clump of G9.62+0.19
Astrophysical Journal Letters, Volume 869, No. 1, Article L5, Year 2018
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Description
How 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 μm 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 ∼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. © 2018. The American Astronomical Society. All rights reserved..
Authors & Co-Authors
Liu, Tie
South Korea, Daejeon
Korea Astronomy and Space Science Institute
United States, Hilo
East Asian Observatory
Kim, Kee-tae
South Korea, Daejeon
Korea Astronomy and Space Science Institute
Liu, Shengyuan
Taiwan, Nankang
Academia Sinica Taiwan
Juvela, Mika J.
Finland, Helsinki
Helsingin Yliopisto
Zhang, Qizhou
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Wu, Yuefang
China, Beijing
Peking University
Li, Pakshing
United States, Berkeley
University of California, Berkeley
Parsons, Harriet A.L.
United States, Hilo
East Asian Observatory
Soam, Archana
South Korea, Daejeon
Korea Astronomy and Space Science Institute
United States, Moffett Field
Nasa Ames Research Center
Goldsmith, Paul F.
United States, Pasadena
California Institute of Technology
Tatematsu, Ken'ichi N.Ichi
Japan, Mitaka
National Institutes of Natural Sciences - National Astronomical Observatory of Japan
Qin, Shengli
China, Kunming
Yunnan University
Garay, Guido
Chile, Santiago
Universidad de Chile
Hirota, Tomoya
Japan, Mitaka
National Institutes of Natural Sciences - National Astronomical Observatory of Japan
Wouterloot, Jan G.A.
United States, Hilo
East Asian Observatory
Chen, Hueiru Ru Vivien
Taiwan, Hsinchu
National Tsing Hua University
Evans, Neal J.
South Korea, Daejeon
Korea Astronomy and Space Science Institute
United States, Austin
The University of Texas at Austin
Graves, Sarah F.
United States, Hilo
East Asian Observatory
Kang, Sung-ju
South Korea, Daejeon
Korea Astronomy and Space Science Institute
Li, D. H.
China, Beijing
University of Chinese Academy of Sciences
China, Beijing
Chinese Academy of Sciences
Mardones, Diego
Chile, Santiago
Universidad de Chile
Germany, Garching Bei Munchen
Max Planck Institute for Extraterrestrial Physics
Rawlings, Mark G.
United States, Hilo
East Asian Observatory
Ren, Zhiyuan
China, Beijing
University of Chinese Academy of Sciences
Wang, Ke
China, Beijing
Peking University
Germany, Garching Bei Munchen
European Southern Observatory
Statistics
Citations: 9
Authors: 24
Affiliations: 18
Identifiers
Doi:
10.3847/2041-8213/aaf19e
ISSN:
20418205