The JCMT BISTRO Survey: Unveiling the Magnetic Fields around Galactic Center

Meng-Zhe Yang; Shih-Ping Lai; Janik Karoly; Kate Pattle; Xing Lu; David Eden; Sheng-Jun Lin; Frederick Poidevin; Ekta Sharma; Jihye Hwang; Lapo Fanciullo; Mehrnoosh Tahani; Patrick M. Koch; Shu-ichiro Inutsuka; Valentin J. M. Le Gouellec; Hao-Yuan Duan; Jia-Wei Wang; Gary Fuller; Ray S. Furuya; Qilao Gu; Tetsuo Hasegawa; Guangxing Li; Junhao Liu; M. S. Akshaya; Bijas Najimudeen; Le Ngoc Tram; Derek Ward-Thompson; Doris Arzoumanian; James Di Francesco; Yasuo Doi; Thiem Hoang; Ji-hyun Kang; Jungmi Kwon; Woojin Kwon; Chang Won Lee; Tie Liu; Takashi Onaka; Sarah Sadavoy; Motohide Tamura; Pierre Bastien; David Berry; Simon Coude; Keping Qiu

doi:10.3847/1538-4357/adbe34

The JCMT BISTRO Survey: Unveiling the Magnetic Fields around Galactic Center

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The JCMT BISTRO Survey: Unveiling the Magnetic Fields around Galactic Center

Meng-Zhe Yang, Shih-Ping Lai, Janik Karoly, Kate Pattle, Xing Lu, David Eden, Sheng-Jun Lin, Frederick Poidevin, Ekta Sharma, Jihye Hwang, …

The Astrophysical journal, 卷.983(2), 頁.184

20/04/2025

DOI: https://doi.org/10.3847/1538-4357/adbe34

Web of Science ID: WOS:001469778000001

摘要

Astronomy & Astrophysics

Physical Sciences

Science & Technology

We acquired 450 and 850 mu m dust continuum polarization observations toward the inner region of the Central Molecular Zone (CMZ) as part of the B-Fields In Star-forming Region Observations survey using the POL-2 polarimeter on the James Clerk Maxwell Telescope. These observations encompassed three dense structures: the 20 km s-1 cloud (20MC), 50 km s-1 cloud (50MC), and circumnuclear disk (CND). Our aim is to investigate the magnetic field morphology and strength in the inner region of the CMZ using polarized dust continuum and the Davis-Chandrasekhar-Fermi method. The magnetic field morphology is highly ordered in all three dense regions. The plane-of-sky magnetic field strengths are similar to 1 mG for the 20MC and the 50MC, and similar to 2 mG for the CND. We compare the energy contributions of turbulence, gravity, and thermal motion with that of the magnetic field using the plasma beta, mass-to-flux ratio, and Alfv & eacute;n Mach number. The outcomes reveal the magnetic field stands out as the predominant factor within the inner region of the CMZ. The dominance of the magnetic field may explain the low star-forming rate in the CMZ. We further investigate the dust grain alignment efficiency by exploring the relationship between polarization fraction and total intensity. The results suggest that dust grains are well aligned with the magnetic fields.

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題名: The JCMT BISTRO Survey: Unveiling the Magnetic Fields around Galactic Center
創作者：: Meng-Zhe Yang - Natl Tsing Hua Univ, Inst Astron, Hsinchu 30013, Taiwan
Shih-Ping Lai - Natl Tsing Hua Univ, Inst Astron, Hsinchu 30013, Taiwan
Janik Karoly - UCL, Dept Phys & Astron, London WC1E 6BT, England
Kate Pattle - UCL, Dept Phys & Astron, London WC1E 6BT, England
Xing Lu
David Eden - University of Bath
Sheng-Jun Lin - Theodore Roosevelt High School
Frederick Poidevin - Inst Astrofis Canarias, Via Lactea, San Cristobal la Laguna 38205, Tenerife, Spain
Ekta Sharma - Chinese Acad Sci, CAS Key Lab FAST, Natl Astron Observ, Beijing, Peoples R China
Jihye Hwang - Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055, South Korea
Lapo Fanciullo - Natl Chung Hsing Univ, 145 Xingda Rd, Taichung 402, Taiwan
Mehrnoosh Tahani - Stanford University
Patrick M. Koch - Theodore Roosevelt High School
Shu-ichiro Inutsuka - Nagoya University
Valentin J. M. Le Gouellec - Universidade Aberta
Hao-Yuan Duan - Natl Tsing Hua Univ, Inst Astron, Hsinchu 30013, Taiwan
Jia-Wei Wang - Theodore Roosevelt High School
Gary Fuller - University of Manchester
Ray S. Furuya - Tokushima University
Qilao Gu - Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
Tetsuo Hasegawa - Natl Inst Nat Sci, Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan
Guangxing Li - Yunnan University
Junhao Liu - Alma
M. S. Akshaya - Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055, South Korea
Bijas Najimudeen - University of Manchester
Le Ngoc Tram - Univ Sci & Technol Hanoi, Vietnam Acad Sci & Technol, 18 Hoang Quoc Viet, Hanoi, Vietnam
Derek Ward-Thompson - Univ Cent Lancashire, Jeremiah Horrocks Inst, Preston PR1 2HE, England
Doris Arzoumanian - Natl Astron Observ Japan, Div Sci, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
James Di Francesco - NRC Herzberg Astron & Astrophys, 5071 West Saanich Rd, Victoria, BC V9E 2E7, Canada
Yasuo Doi - Univ Tokyo, Grad Sch Arts & Sci, Dept Earth Sci & Astron, 3-8-1 Komaba,Meguro Ku, Tokyo, Japan
Thiem Hoang - Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055, South Korea
Ji-hyun Kang - Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055, South Korea
Jungmi Kwon - Univ Tokyo, Dept Astron, 7-3-1 Hongo,Bunkyo Ku, Tokyo 1130033, Japan
Woojin Kwon - Seoul Natl Univ, Dept Earth Sci Educ, 1 Gwanak Ro, Seoul 08826, South Korea
Chang Won Lee - Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055, South Korea
Tie Liu - Chinese Acad Sci, Key Lab Res Galaxies & Cosmol, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
Takashi Onaka - Univ Tokyo, Grad Sch Sci, Dept Astron, 7-3-1 Hongo,Bunkyo Ku, Tokyo, Japan
Sarah Sadavoy - Queens University
Motohide Tamura - Natl Inst Nat Sci, Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan
Pierre Bastien - Univ Montreal, Ctr Rech Astrophys Quebec, CP 6128 Succ Ctr Ville, Montreal, PQ H3C 3J7, Canada
David Berry - East Asian Observ, 660 N Aohoku Pl, Univ Pk, Hilo, HI 96720 USA
Simon Coude - Ames Research Center
Keping Qiu - Nanjing University
出版者: IOP Publishing Ltd
總頁數: 26
補助款備註: Ministry of Education of Taiwan; Ministry of Education, Taiwan XDB0800300 / Strategic Priority Research Program of the Chinese Academy of Sciences (CAS) National Science and Technology Council of Taiwan 11988101 / National Natural Science Foundation of China (NSFC) Korea Astronomy and Space Science Institute Royal Society; Royal Society UK M20AL018; M17AP074 / Canadian Space Agency ANSO-VF-2021-01 / Alliance of International Science Organizations (ANSO) Canada Foundation for Innovation; CGIAR 109-2112-M-007-010-MY3; 112-2112-M-007-011 / National Science and Technology Council (NSTC) of Taiwan
學術資源類型: 期刊文章
出版日期: 20/04/2025
出版資訊: The Astrophysical journal, 卷.983(2), 頁.184
語言: 英語

The JCMT BISTRO Survey: Unveiling the Magnetic Fields around Galactic Center

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