The JCMT BISTRO Survey: A Spiral Magnetic Field in a Hub-filament Structure, Monoceros R2

Jihye Hwang; Jongsoo Kim; Kate Pattle; Chang Won Lee; Patrick M. Koch; Doug Johnstone; Kohji Tomisaka; Anthony Whitworth; Ray S. Furuya; Ji Hyun Kang; A. Ran Lyo; Eun Jung Chung; Doris Arzoumanian; Geumsook Park; Woojin Kwon; Shinyoung Kim; Motohide Tamura; Jungmi Kwon; Archana Soam; Ilseung Han; Thiem Hoang; Kyoung Hee Kim; Takashi Onaka; Chakali Eswaraiah; Derek Ward-Thompson; Hong Li Liu; Xindi Tang; Wen Ping Chen; Masafumi Matsumura; Thuong Duc Hoang; Zhiwei Chen; Valentin J.M. Le Gouellec; Florian Kirchschlager; Frédérick Poidevin; Pierre Bastien; Keping Qiu; Tetsuo Hasegawa; Shih Ping Lai; Do Young Byun; Jungyeon Cho; Minho Choi; Youngwoo Choi; Yunhee Choi; Il Gyo Jeong; Miju Kang; Hyosung Kim; Kee Tae Kim; Jeong Eun Lee; Sang Sung Lee; Yong Hee Lee; Hyeseung Lee; Mi Ryang Kim; Hyunju Yoo; Hyeong Sik Yun; Mike Chen; James Di Francesco; Jason Fiege; Laura M. Fissel; Erica Franzmann; Martin Houde; Kevin Lacaille; Brenda Matthews; Sarah Sadavoy; Gerald Moriarty-Schieven; Mehrnoosh Tahani; Tao Chung Ching; Y. Sophia Dai; Yan Duan; Qilao Gu; Chi Yan Law; Dalei Li; Di Li; Guangxing Li; Hua Bai Li; Tie Liu; Xing Lu; Lei Qian; Hongchi Wang; Jintai Wu; Jinjin Xie; Jinghua Yuan; Chuan Peng Zhang; Guoyin Zhang; Yapeng Zhang; Jianjun Zhou; Lei Zhu; David Berry; Per Friberg; Sarah Graves; Junhao Liu; Steve Mairs; Harriet Parsons; Mark Rawlings; Yasuo Doi; Saeko Hayashi; Charles L.H. Hull; Tsuyoshi Inoue; Shu Ichiro Inutsuka; Kazunari Iwasaki; Akimasa Kataoka; Koji Kawabata; Gwanjeong Kim; Masato I.N. Kobayashi; Tetsuya Nagata; Fumitaka Nakamura; Hiroyuki Nakanishi; Tae Soo Pyo; Hiro Saito; Masumichi Seta; Yoshito Shimajiri; Hiroko Shinnaga; Yusuke Tsukamoto; Tetsuya Zenko; Huei Ru Vivien Chen; Hao Yuan Duan; Lapo Fanciullo; Francisca Kemper; Chin Fei Lee; Sheng Jun Lin; Sheng Yuan Liu; Nagayoshi Ohashi; Ramprasad Rao; Ya Wen Tang; Jia Wei Wang; Meng Zhe Yang; Hsi Wei Yen; Tyler L. Bourke; Antonio Chrysostomou; Victor Debattista; David Eden; Stewart Eyres; Sam Falle; Gary Fuller; Tim Gledhill; Jane Greaves; Matt Griffin; Jennifer Hatchell; Janik Karoly; Jason Kirk; Vera Könyves; Steven Longmore; Sven van Loo; Ilse de Looze; Nicolas Peretto; Felix Priestley; Jonathan Rawlings; Brendan Retter; John Richer; Andrew Rigby; Giorgio Savini; Anna Scaife; Serena Viti; Pham Ngoc Diep; Nguyen Bich Ngoc; Le Ngoc Tram; Philippe André; Simon Coudé; C. Darren Dowell; Rachel Friesen; Jean Franćois Robitaille

doi:10.3847/1538-4357/ac99e0

The JCMT BISTRO Survey: A Spiral Magnetic Field in a Hub-filament Structure, Monoceros R2

Jihye Hwang, Jongsoo Kim, Kate Pattle, Chang Won Lee, Patrick M. Koch, Doug Johnstone, Kohji Tomisaka, Anthony Whitworth, Ray S. Furuya, Ji Hyun Kang, A. Ran Lyo, Eun Jung Chung, Doris Arzoumanian, Geumsook Park, Woojin Kwon, Shinyoung Kim, Motohide Tamura, Jungmi Kwon, Archana Soam, Ilseung HanThiem Hoang, Kyoung Hee Kim, Takashi Onaka, Chakali Eswaraiah, Derek Ward-Thompson, Hong Li Liu, Xindi Tang, Wen Ping Chen, Masafumi Matsumura, Thuong Duc Hoang, Zhiwei Chen, Valentin J.M. Le Gouellec, Florian Kirchschlager, Frédérick Poidevin, Pierre Bastien, Keping Qiu, Tetsuo Hasegawa, Shih Ping Lai, Do Young Byun, Jungyeon Cho, Minho Choi, Youngwoo Choi, Yunhee Choi, Il Gyo Jeong, Miju Kang, Hyosung Kim, Kee Tae Kim, Jeong Eun Lee, Sang Sung Lee, Yong Hee Lee, Hyeseung Lee, Mi Ryang Kim, Hyunju Yoo, Hyeong Sik Yun, Mike Chen, James Di Francesco, Jason Fiege, Laura M. Fissel, Erica Franzmann, Martin Houde, Kevin Lacaille, Brenda Matthews, Sarah Sadavoy, Gerald Moriarty-Schieven, Mehrnoosh Tahani, Tao Chung Ching, Y. Sophia Dai, Yan Duan, Qilao Gu, Chi Yan Law, Dalei Li, Di Li, Guangxing Li, Hua Bai Li, Tie Liu, Xing Lu, Lei Qian, Hongchi Wang, Jintai Wu, Jinjin Xie, Jinghua Yuan, Chuan Peng Zhang, Guoyin Zhang, Yapeng Zhang, Jianjun Zhou, Lei Zhu, David Berry, Per Friberg, Sarah Graves, Junhao Liu, Steve Mairs, Harriet Parsons, Mark Rawlings, Yasuo Doi, Saeko Hayashi, Charles L.H. Hull, Tsuyoshi Inoue, Shu Ichiro Inutsuka, Kazunari Iwasaki, Akimasa Kataoka, Koji Kawabata, Gwanjeong Kim, Masato I.N. Kobayashi, Tetsuya Nagata, Fumitaka Nakamura, Hiroyuki Nakanishi, Tae Soo Pyo, Hiro Saito, Masumichi Seta, Yoshito Shimajiri, Hiroko Shinnaga, Yusuke Tsukamoto, Tetsuya Zenko, Huei Ru Vivien Chen, Hao Yuan Duan, Lapo Fanciullo, Francisca Kemper, Chin Fei Lee, Sheng Jun Lin, Sheng Yuan Liu, Nagayoshi Ohashi, Ramprasad Rao, Ya Wen Tang, Jia Wei Wang, Meng Zhe Yang, Hsi Wei Yen, Tyler L. Bourke, Antonio Chrysostomou, Victor Debattista, David Eden, Stewart Eyres, Sam Falle, Gary Fuller, Tim Gledhill, Jane Greaves, Matt Griffin, Jennifer Hatchell, Janik Karoly, Jason Kirk, Vera Könyves, Steven Longmore, Sven van Loo, Ilse de Looze, Nicolas Peretto, Felix Priestley, Jonathan Rawlings, Brendan Retter, John Richer, Andrew Rigby, Giorgio Savini, Anna Scaife, Serena Viti, Pham Ngoc Diep, Nguyen Bich Ngoc, Le Ngoc Tram, Philippe André, Simon Coudé, C. Darren Dowell, Rachel Friesen, Jean Franćois Robitaille

天文研究所

研究成果: 雜誌貢獻 › 期刊論文 › 同行評審

10 引文斯高帕斯（Scopus）

摘要

We present and analyze observations of polarized dust emission at 850 μm toward the central 1 × 1 pc hub-filament structure of Monoceros R2 (Mon R2). The data are obtained with SCUBA-2/POL-2 on the James Clerk Maxwell Telescope (JCMT) as part of the B-fields in Star-forming Region Observations survey. The orientations of the magnetic field follow the spiral structure of Mon R2, which are well described by an axisymmetric magnetic field model. We estimate the turbulent component of the magnetic field using the angle difference between our observations and the best-fit model of the underlying large-scale mean magnetic field. This estimate is used to calculate the magnetic field strength using the Davis–Chandrasekhar–Fermi method, for which we also obtain the distribution of volume density and velocity dispersion using a column density map derived from Herschel data and the C¹⁸O (J = 3 - 2) data taken with HARP on the JCMT, respectively. We make maps of magnetic field strengths and mass-to-flux ratios, finding that magnetic field strengths vary from 0.02 to 3.64 mG with a mean value of 1.0 ± 0.06 mG, and the mean critical mass-to-flux ratio is 0.47 ± 0.02. Additionally, the mean Alfvén Mach number is 0.35 ± 0.01. This suggests that, in Mon R2, the magnetic fields provide resistance against large-scale gravitational collapse, and the magnetic pressure exceeds the turbulent pressure. We also investigate the properties of each filament in Mon R2. Most of the filaments are aligned along the magnetic field direction and are magnetically subcritical.

原文	???core.languages.en_GB???
文章編號	51
期刊	Astrophysical Journal
卷	941
發行號	1
DOIs	https://doi.org/10.3847/1538-4357/ac99e0
出版狀態	已出版 - 1 12月 2022

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10.3847/1538-4357/ac99e0

引用此

Hwang, J., Kim, J., Pattle, K., Lee, C. W., Koch, P. M., Johnstone, D., Tomisaka, K., Whitworth, A., Furuya, R. S., Kang, J. H., Lyo, A. R., Chung, E. J., Arzoumanian, D., Park, G., Kwon, W., Kim, S., Tamura, M., Kwon, J., Soam, A., ... Robitaille, J. F. (2022). The JCMT BISTRO Survey: A Spiral Magnetic Field in a Hub-filament Structure, Monoceros R2. Astrophysical Journal, 941(1), 文章 51. https://doi.org/10.3847/1538-4357/ac99e0

@article{2c1d108f612a4547aa98878bd5dfe342,

title = "The JCMT BISTRO Survey: A Spiral Magnetic Field in a Hub-filament Structure, Monoceros R2",

abstract = "We present and analyze observations of polarized dust emission at 850 μm toward the central 1 × 1 pc hub-filament structure of Monoceros R2 (Mon R2). The data are obtained with SCUBA-2/POL-2 on the James Clerk Maxwell Telescope (JCMT) as part of the B-fields in Star-forming Region Observations survey. The orientations of the magnetic field follow the spiral structure of Mon R2, which are well described by an axisymmetric magnetic field model. We estimate the turbulent component of the magnetic field using the angle difference between our observations and the best-fit model of the underlying large-scale mean magnetic field. This estimate is used to calculate the magnetic field strength using the Davis–Chandrasekhar–Fermi method, for which we also obtain the distribution of volume density and velocity dispersion using a column density map derived from Herschel data and the C18O (J = 3 - 2) data taken with HARP on the JCMT, respectively. We make maps of magnetic field strengths and mass-to-flux ratios, finding that magnetic field strengths vary from 0.02 to 3.64 mG with a mean value of 1.0 ± 0.06 mG, and the mean critical mass-to-flux ratio is 0.47 ± 0.02. Additionally, the mean Alfv{\'e}n Mach number is 0.35 ± 0.01. This suggests that, in Mon R2, the magnetic fields provide resistance against large-scale gravitational collapse, and the magnetic pressure exceeds the turbulent pressure. We also investigate the properties of each filament in Mon R2. Most of the filaments are aligned along the magnetic field direction and are magnetically subcritical.",

author = "Jihye Hwang and Jongsoo Kim and Kate Pattle and Lee, {Chang Won} and Koch, {Patrick M.} and Doug Johnstone and Kohji Tomisaka and Anthony Whitworth and Furuya, {Ray S.} and Kang, {Ji Hyun} and Lyo, {A. Ran} and Chung, {Eun Jung} and Doris Arzoumanian and Geumsook Park and Woojin Kwon and Shinyoung Kim and Motohide Tamura and Jungmi Kwon and Archana Soam and Ilseung Han and Thiem Hoang and Kim, {Kyoung Hee} and Takashi Onaka and Chakali Eswaraiah and Derek Ward-Thompson and Liu, {Hong Li} and Xindi Tang and Chen, {Wen Ping} and Masafumi Matsumura and Hoang, {Thuong Duc} and Zhiwei Chen and {Le Gouellec}, {Valentin J.M.} and Florian Kirchschlager and Fr{\'e}d{\'e}rick Poidevin and Pierre Bastien and Keping Qiu and Tetsuo Hasegawa and Lai, {Shih Ping} and Byun, {Do Young} and Jungyeon Cho and Minho Choi and Youngwoo Choi and Yunhee Choi and Jeong, {Il Gyo} and Miju Kang and Hyosung Kim and Kim, {Kee Tae} and Lee, {Jeong Eun} and Lee, {Sang Sung} and Lee, {Yong Hee} and Hyeseung Lee and Kim, {Mi Ryang} and Hyunju Yoo and Yun, {Hyeong Sik} and Mike Chen and {Di Francesco}, James and Jason Fiege and Fissel, {Laura M.} and Erica Franzmann and Martin Houde and Kevin Lacaille and Brenda Matthews and Sarah Sadavoy and Gerald Moriarty-Schieven and Mehrnoosh Tahani and Ching, {Tao Chung} and Dai, {Y. Sophia} and Yan Duan and Qilao Gu and Law, {Chi Yan} and Dalei Li and Di Li and Guangxing Li and Li, {Hua Bai} and Tie Liu and Xing Lu and Lei Qian and Hongchi Wang and Jintai Wu and Jinjin Xie and Jinghua Yuan and Zhang, {Chuan Peng} and Guoyin Zhang and Yapeng Zhang and Jianjun Zhou and Lei Zhu and David Berry and Per Friberg and Sarah Graves and Junhao Liu and Steve Mairs and Harriet Parsons and Mark Rawlings and Yasuo Doi and Saeko Hayashi and Hull, {Charles L.H.} and Tsuyoshi Inoue and Inutsuka, {Shu Ichiro} and Kazunari Iwasaki and Akimasa Kataoka and Koji Kawabata and Gwanjeong Kim and Kobayashi, {Masato I.N.} and Tetsuya Nagata and Fumitaka Nakamura and Hiroyuki Nakanishi and Pyo, {Tae Soo} and Hiro Saito and Masumichi Seta and Yoshito Shimajiri and Hiroko Shinnaga and Yusuke Tsukamoto and Tetsuya Zenko and Chen, {Huei Ru Vivien} and Duan, {Hao Yuan} and Lapo Fanciullo and Francisca Kemper and Lee, {Chin Fei} and Lin, {Sheng Jun} and Liu, {Sheng Yuan} and Nagayoshi Ohashi and Ramprasad Rao and Tang, {Ya Wen} and Wang, {Jia Wei} and Yang, {Meng Zhe} and Yen, {Hsi Wei} and Bourke, {Tyler L.} and Antonio Chrysostomou and Victor Debattista and David Eden and Stewart Eyres and Sam Falle and Gary Fuller and Tim Gledhill and Jane Greaves and Matt Griffin and Jennifer Hatchell and Janik Karoly and Jason Kirk and Vera K{\"o}nyves and Steven Longmore and {van Loo}, Sven and {de Looze}, Ilse and Nicolas Peretto and Felix Priestley and Jonathan Rawlings and Brendan Retter and John Richer and Andrew Rigby and Giorgio Savini and Anna Scaife and Serena Viti and Diep, {Pham Ngoc} and Ngoc, {Nguyen Bich} and Tram, {Le Ngoc} and Philippe Andr{\'e} and Simon Coud{\'e} and Dowell, {C. Darren} and Rachel Friesen and Robitaille, {Jean Fran{\'c}ois}",

note = "Publisher Copyright: {\textcopyright} 2022. The Author(s).",

year = "2022",

month = dec,

day = "1",

doi = "10.3847/1538-4357/ac99e0",

language = "???core.languages.en_GB???",

volume = "941",

journal = "Astrophysical Journal",

issn = "0004-637X",

number = "1",

}

Hwang, J, Kim, J, Pattle, K, Lee, CW, Koch, PM, Johnstone, D, Tomisaka, K, Whitworth, A, Furuya, RS, Kang, JH, Lyo, AR, Chung, EJ, Arzoumanian, D, Park, G, Kwon, W, Kim, S, Tamura, M, Kwon, J, Soam, A, Han, I, Hoang, T, Kim, KH, Onaka, T, Eswaraiah, C, Ward-Thompson, D, Liu, HL, Tang, X, Chen, WP, Matsumura, M, Hoang, TD, Chen, Z, Le Gouellec, VJM, Kirchschlager, F, Poidevin, F, Bastien, P, Qiu, K, Hasegawa, T, Lai, SP, Byun, DY, Cho, J, Choi, M, Choi, Y, Choi, Y, Jeong, IG, Kang, M, Kim, H, Kim, KT, Lee, JE, Lee, SS, Lee, YH, Lee, H, Kim, MR, Yoo, H, Yun, HS, Chen, M, Di Francesco, J, Fiege, J, Fissel, LM, Franzmann, E, Houde, M, Lacaille, K, Matthews, B, Sadavoy, S, Moriarty-Schieven, G, Tahani, M, Ching, TC, Dai, YS, Duan, Y, Gu, Q, Law, CY, Li, D, Li, D, Li, G, Li, HB, Liu, T, Lu, X, Qian, L, Wang, H, Wu, J, Xie, J, Yuan, J, Zhang, CP, Zhang, G, Zhang, Y, Zhou, J, Zhu, L, Berry, D, Friberg, P, Graves, S, Liu, J, Mairs, S, Parsons, H, Rawlings, M, Doi, Y, Hayashi, S, Hull, CLH, Inoue, T, Inutsuka, SI, Iwasaki, K, Kataoka, A, Kawabata, K, Kim, G, Kobayashi, MIN, Nagata, T, Nakamura, F, Nakanishi, H, Pyo, TS, Saito, H, Seta, M, Shimajiri, Y, Shinnaga, H, Tsukamoto, Y, Zenko, T, Chen, HRV, Duan, HY, Fanciullo, L, Kemper, F, Lee, CF, Lin, SJ, Liu, SY, Ohashi, N, Rao, R, Tang, YW, Wang, JW, Yang, MZ, Yen, HW, Bourke, TL, Chrysostomou, A, Debattista, V, Eden, D, Eyres, S, Falle, S, Fuller, G, Gledhill, T, Greaves, J, Griffin, M, Hatchell, J, Karoly, J, Kirk, J, Könyves, V, Longmore, S, van Loo, S, de Looze, I, Peretto, N, Priestley, F, Rawlings, J, Retter, B, Richer, J, Rigby, A, Savini, G, Scaife, A, Viti, S, Diep, PN, Ngoc, NB, Tram, LN, André, P, Coudé, S, Dowell, CD, Friesen, R & Robitaille, JF 2022, 'The JCMT BISTRO Survey: A Spiral Magnetic Field in a Hub-filament Structure, Monoceros R2', Astrophysical Journal, 卷 941, 編號 1, 51. https://doi.org/10.3847/1538-4357/ac99e0

TY - JOUR

T1 - The JCMT BISTRO Survey

T2 - A Spiral Magnetic Field in a Hub-filament Structure, Monoceros R2

AU - Hwang, Jihye

AU - Kim, Jongsoo

AU - Pattle, Kate

AU - Lee, Chang Won

AU - Koch, Patrick M.

AU - Johnstone, Doug

AU - Tomisaka, Kohji

AU - Whitworth, Anthony

AU - Furuya, Ray S.

AU - Kang, Ji Hyun

AU - Lyo, A. Ran

AU - Chung, Eun Jung

AU - Arzoumanian, Doris

AU - Park, Geumsook

AU - Kwon, Woojin

AU - Kim, Shinyoung

AU - Tamura, Motohide

AU - Kwon, Jungmi

AU - Soam, Archana

AU - Han, Ilseung

AU - Hoang, Thiem

AU - Kim, Kyoung Hee

AU - Onaka, Takashi

AU - Eswaraiah, Chakali

AU - Ward-Thompson, Derek

AU - Liu, Hong Li

AU - Tang, Xindi

AU - Chen, Wen Ping

AU - Matsumura, Masafumi

AU - Hoang, Thuong Duc

AU - Chen, Zhiwei

AU - Le Gouellec, Valentin J.M.

AU - Kirchschlager, Florian

AU - Poidevin, Frédérick

AU - Bastien, Pierre

AU - Qiu, Keping

AU - Hasegawa, Tetsuo

AU - Lai, Shih Ping

AU - Byun, Do Young

AU - Cho, Jungyeon

AU - Choi, Minho

AU - Choi, Youngwoo

AU - Choi, Yunhee

AU - Jeong, Il Gyo

AU - Kang, Miju

AU - Kim, Hyosung

AU - Kim, Kee Tae

AU - Lee, Jeong Eun

AU - Lee, Sang Sung

AU - Lee, Yong Hee

AU - Lee, Hyeseung

AU - Kim, Mi Ryang

AU - Yoo, Hyunju

AU - Yun, Hyeong Sik

AU - Chen, Mike

AU - Di Francesco, James

AU - Fiege, Jason

AU - Fissel, Laura M.

AU - Franzmann, Erica

AU - Houde, Martin

AU - Lacaille, Kevin

AU - Matthews, Brenda

AU - Sadavoy, Sarah

AU - Moriarty-Schieven, Gerald

AU - Tahani, Mehrnoosh

AU - Ching, Tao Chung

AU - Dai, Y. Sophia

AU - Duan, Yan

AU - Gu, Qilao

AU - Law, Chi Yan

AU - Li, Dalei

AU - Li, Di

AU - Li, Guangxing

AU - Li, Hua Bai

AU - Liu, Tie

AU - Lu, Xing

AU - Qian, Lei

AU - Wang, Hongchi

AU - Wu, Jintai

AU - Xie, Jinjin

AU - Yuan, Jinghua

AU - Zhang, Chuan Peng

AU - Zhang, Guoyin

AU - Zhang, Yapeng

AU - Zhou, Jianjun

AU - Zhu, Lei

AU - Berry, David

AU - Friberg, Per

AU - Graves, Sarah

AU - Liu, Junhao

AU - Mairs, Steve

AU - Parsons, Harriet

AU - Rawlings, Mark

AU - Doi, Yasuo

AU - Hayashi, Saeko

AU - Hull, Charles L.H.

AU - Inoue, Tsuyoshi

AU - Inutsuka, Shu Ichiro

AU - Iwasaki, Kazunari

AU - Kataoka, Akimasa

AU - Kawabata, Koji

AU - Kim, Gwanjeong

AU - Kobayashi, Masato I.N.

AU - Nagata, Tetsuya

AU - Nakamura, Fumitaka

AU - Nakanishi, Hiroyuki

AU - Pyo, Tae Soo

AU - Saito, Hiro

AU - Seta, Masumichi

AU - Shimajiri, Yoshito

AU - Shinnaga, Hiroko

AU - Tsukamoto, Yusuke

AU - Zenko, Tetsuya

AU - Chen, Huei Ru Vivien

AU - Duan, Hao Yuan

AU - Fanciullo, Lapo

AU - Kemper, Francisca

AU - Lee, Chin Fei

AU - Lin, Sheng Jun

AU - Liu, Sheng Yuan

AU - Ohashi, Nagayoshi

AU - Rao, Ramprasad

AU - Tang, Ya Wen

AU - Wang, Jia Wei

AU - Yang, Meng Zhe

AU - Yen, Hsi Wei

AU - Bourke, Tyler L.

AU - Chrysostomou, Antonio

AU - Debattista, Victor

AU - Eden, David

AU - Eyres, Stewart

AU - Falle, Sam

AU - Fuller, Gary

AU - Gledhill, Tim

AU - Greaves, Jane

AU - Griffin, Matt

AU - Hatchell, Jennifer

AU - Karoly, Janik

AU - Kirk, Jason

AU - Könyves, Vera

AU - Longmore, Steven

AU - van Loo, Sven

AU - de Looze, Ilse

AU - Peretto, Nicolas

AU - Priestley, Felix

AU - Rawlings, Jonathan

AU - Retter, Brendan

AU - Richer, John

AU - Rigby, Andrew

AU - Savini, Giorgio

AU - Scaife, Anna

AU - Viti, Serena

AU - Diep, Pham Ngoc

AU - Ngoc, Nguyen Bich

AU - Tram, Le Ngoc

AU - André, Philippe

AU - Coudé, Simon

AU - Dowell, C. Darren

AU - Friesen, Rachel

AU - Robitaille, Jean Franćois

PY - 2022/12/1

Y1 - 2022/12/1

N2 - We present and analyze observations of polarized dust emission at 850 μm toward the central 1 × 1 pc hub-filament structure of Monoceros R2 (Mon R2). The data are obtained with SCUBA-2/POL-2 on the James Clerk Maxwell Telescope (JCMT) as part of the B-fields in Star-forming Region Observations survey. The orientations of the magnetic field follow the spiral structure of Mon R2, which are well described by an axisymmetric magnetic field model. We estimate the turbulent component of the magnetic field using the angle difference between our observations and the best-fit model of the underlying large-scale mean magnetic field. This estimate is used to calculate the magnetic field strength using the Davis–Chandrasekhar–Fermi method, for which we also obtain the distribution of volume density and velocity dispersion using a column density map derived from Herschel data and the C18O (J = 3 - 2) data taken with HARP on the JCMT, respectively. We make maps of magnetic field strengths and mass-to-flux ratios, finding that magnetic field strengths vary from 0.02 to 3.64 mG with a mean value of 1.0 ± 0.06 mG, and the mean critical mass-to-flux ratio is 0.47 ± 0.02. Additionally, the mean Alfvén Mach number is 0.35 ± 0.01. This suggests that, in Mon R2, the magnetic fields provide resistance against large-scale gravitational collapse, and the magnetic pressure exceeds the turbulent pressure. We also investigate the properties of each filament in Mon R2. Most of the filaments are aligned along the magnetic field direction and are magnetically subcritical.

AB - We present and analyze observations of polarized dust emission at 850 μm toward the central 1 × 1 pc hub-filament structure of Monoceros R2 (Mon R2). The data are obtained with SCUBA-2/POL-2 on the James Clerk Maxwell Telescope (JCMT) as part of the B-fields in Star-forming Region Observations survey. The orientations of the magnetic field follow the spiral structure of Mon R2, which are well described by an axisymmetric magnetic field model. We estimate the turbulent component of the magnetic field using the angle difference between our observations and the best-fit model of the underlying large-scale mean magnetic field. This estimate is used to calculate the magnetic field strength using the Davis–Chandrasekhar–Fermi method, for which we also obtain the distribution of volume density and velocity dispersion using a column density map derived from Herschel data and the C18O (J = 3 - 2) data taken with HARP on the JCMT, respectively. We make maps of magnetic field strengths and mass-to-flux ratios, finding that magnetic field strengths vary from 0.02 to 3.64 mG with a mean value of 1.0 ± 0.06 mG, and the mean critical mass-to-flux ratio is 0.47 ± 0.02. Additionally, the mean Alfvén Mach number is 0.35 ± 0.01. This suggests that, in Mon R2, the magnetic fields provide resistance against large-scale gravitational collapse, and the magnetic pressure exceeds the turbulent pressure. We also investigate the properties of each filament in Mon R2. Most of the filaments are aligned along the magnetic field direction and are magnetically subcritical.

UR - http://www.scopus.com/inward/record.url?scp=85144795071&partnerID=8YFLogxK

U2 - 10.3847/1538-4357/ac99e0

DO - 10.3847/1538-4357/ac99e0

M3 - 期刊論文

AN - SCOPUS:85144795071

SN - 0004-637X

VL - 941

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 51

ER -

The JCMT BISTRO Survey: A Spiral Magnetic Field in a Hub-filament Structure, Monoceros R2

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