
Observations of magnetic fields surrounding LkHα 101 taken by the BISTRO survey with JCMT-POL-2
- Author
- Nguyen Bich Ngoc, Pham Ngoc Diep, Harriet Parsons, Kate Pattle, Thiem Hoang, Derek Ward-Thompson, Le Ngoc Tram, Charles L. H. Hull, Mehrnoosh Tahani, Ray Furuya, Pierre Bastien, Keping Qiu, Tetsuo Hasegawa, Woojin Kwon, Yasuo Doi, Shih-Ping Lai, Simon Coude, David Berry, Tao-Chung Ching, Jihye Hwang, Archana Soam, Jia-Wei Wang, Doris Arzoumanian, Tyler L. Bourke, Do-Young Byun, Huei-Ru Vivien Chen, Zhiwei Chen, Wen Ping Chen, Mike Chen, Jungyeon Cho, Yunhee Choi, Minho Choi, Antonio Chrysostomou, Eun Jung Chung, Sophia Dai, James Di Francesco, Yan Duan, Hao-Yuan Duan, David Eden, Chakali Eswaraiah, Lapo Fanciullo, Jason Fiege, Laura M. Fissel, Erica Franzmann, Per Friberg, Rachel Friesen, Gary Fuller, Tim Gledhill, Sarah Graves, Jane Greaves, Matt Griffin, Qilao Gu, Ilseung Han, Jennifer Hatchell, Saeko Hayashi, Martin Houde, Tsuyoshi Inoue, Shu-ichiro Inutsuka, Kazunari Iwasaki, Il-Gyo Jeong, Doug Johnstone, Ji-hyun Kang, Sung-ju Kang, Miju Kang, Akimasa Kataoka, Koji Kawabata, Francisca Kemper, Kee-Tae Kim, Jongsoo Kim, Tae-Soo Pyo, Lei Qian, Ramprasad Rao, Mark Rawlings, Jonathan Rawlings, Brendan Retter, John Richer, Andrew Rigby, Sarah Sadavoy, Hiro Saito, Giorgio Savini, Anna Scaife, Masumichi Seta, Gwanjeong Kim, Shinyoung Kim, Kyoung Hee Kim, Mi-Ryang Kim, Florian Kirchschlager (UGent) , Jason Kirk, Masato I. N. Kobayashi, Patrick M. Koch, Vera Konyves, Takayoshi Kusune, Jungmi Kwon, Kevin Lacaille, Chi-Yan Law, Sang-Sung Lee, Yong-Hee Lee, Chin-Fei Lee, Jeong-Eun Lee, Hyeseung Lee, Chang Won Lee, Di Li, Hua-bai Li, Dalei Li, Hong-Li Liu, Junhao Liu, Tie Liu, Sheng-Yuan Liu, Xing Lu, A-Ran Lyo, Steve Mairs, Masafumi Matsumura, Brenda Matthews, Gerald Moriarty-Schieven, Tetsuya Nagata, Fumitaka Nakamura, Hiroyuki Nakanishi, Nagayoshi Ohashi, Takashi Onaka, Geumsook Park, Nicolas Peretto, Yoshito Shimajiri, Hiroko Shinnaga, Motohide Tamura, Ya-Wen Tang, Xindi Tang, Kohji Tomisaka, Yusuke Tsukamoto, Serena Viti, Hongchi Wang, Anthony Whitworth, Jinjin Xie, Hsi-Wei Yen, Hyunju Yoo, Jinghua Yuan, Hyeong-Sik Yun, Tetsuya Zenko, Yapeng Zhang, Chuan-Peng Zhang, Guoyin Zhang, Jianjun Zhou, Lei Zhu, Ilse De Looze (UGent) , Philippe Andre, C. Darren Dowell, Stewart Eyres, Sam Falle, Jean-Francois Robitaille and Sven van Loo
- Organization
- Abstract
- We report the first high spatial resolution measurement of magnetic fields surrounding LkH alpha 101, part of the Auriga-California molecular cloud. The observations were taken with the POL-2 polarimeter on the James Clerk Maxwell Telescope within the framework of the B-fields In Star-forming Region Observations (BISTRO) survey. Observed polarization of thermal dust emission at 850 mu m is found to be mostly associated with the redshifted gas component of the cloud. The magnetic field displays a relatively complex morphology. Two variants of the Davis-Chandrasekhar-Fermi method, unsharp masking and structure function, are used to calculate the strength of magnetic fields in the plane of the sky, yielding a similar result of B-POS similar to 115 mu G. The mass-to-magnetic-flux ratio in critical value units, lambda similar to 0.3, is the smallest among the values obtained for other regions surveyed by POL-2. This implies that the LkH alpha 101 region is subcritical, and the magnetic field is strong enough to prevent gravitational collapse. The inferred delta B/B-0 similar to 0.3 implies that the large-scale component of the magnetic field dominates the turbulent one. The variation of the polarization fraction with total emission intensity can be fitted by a power law with an index of alpha = 0.82 0.03, which lies in the range previously reported for molecular clouds. We find that the polarization fraction decreases rapidly with proximity to the only early B star (LkH alpha 101) in the region. Magnetic field tangling and the joint effect of grain alignment and rotational disruption by radiative torques can potentially explain such a decreasing trend.
- Keywords
- MOLECULAR CLOUD, DUST POLARIZATION, GRAIN ALIGNMENT, EMBEDDED PROTOSTARS, RHO OPHIUCHI, H-I, 1ST, SCUBA-2, SUBMILLIMETER, FILAMENT, Interstellar magnetic fields, Molecular clouds, Star formation, 845, 1072, 1569, Astrophysics - Astrophysics of Galaxies, Astrophysics - Solar and Stellar Astrophysics
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Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-01JXCFPZV6DEAAX8NS0DR7VM9C
- MLA
- Ngoc, Nguyen Bich, et al. “Observations of Magnetic Fields Surrounding LkHα 101 Taken by the BISTRO Survey with JCMT-POL-2.” ASTROPHYSICAL JOURNAL, vol. 908, no. 1, 2021, doi:10.3847/1538-4357/abd0fc.
- APA
- Ngoc, N. B., Diep, P. N., Parsons, H., Pattle, K., Hoang, T., Ward-Thompson, D., … van Loo, S. (2021). Observations of magnetic fields surrounding LkHα 101 taken by the BISTRO survey with JCMT-POL-2. ASTROPHYSICAL JOURNAL, 908(1). https://doi.org/10.3847/1538-4357/abd0fc
- Chicago author-date
- Ngoc, Nguyen Bich, Pham Ngoc Diep, Harriet Parsons, Kate Pattle, Thiem Hoang, Derek Ward-Thompson, Le Ngoc Tram, et al. 2021. “Observations of Magnetic Fields Surrounding LkHα 101 Taken by the BISTRO Survey with JCMT-POL-2.” ASTROPHYSICAL JOURNAL 908 (1). https://doi.org/10.3847/1538-4357/abd0fc.
- Chicago author-date (all authors)
- Ngoc, Nguyen Bich, Pham Ngoc Diep, Harriet Parsons, Kate Pattle, Thiem Hoang, Derek Ward-Thompson, Le Ngoc Tram, Charles L. H. Hull, Mehrnoosh Tahani, Ray Furuya, Pierre Bastien, Keping Qiu, Tetsuo Hasegawa, Woojin Kwon, Yasuo Doi, Shih-Ping Lai, Simon Coude, David Berry, Tao-Chung Ching, Jihye Hwang, Archana Soam, Jia-Wei Wang, Doris Arzoumanian, Tyler L. Bourke, Do-Young Byun, Huei-Ru Vivien Chen, Zhiwei Chen, Wen Ping Chen, Mike Chen, Jungyeon Cho, Yunhee Choi, Minho Choi, Antonio Chrysostomou, Eun Jung Chung, Sophia Dai, James Di Francesco, Yan Duan, Hao-Yuan Duan, David Eden, Chakali Eswaraiah, Lapo Fanciullo, Jason Fiege, Laura M. Fissel, Erica Franzmann, Per Friberg, Rachel Friesen, Gary Fuller, Tim Gledhill, Sarah Graves, Jane Greaves, Matt Griffin, Qilao Gu, Ilseung Han, Jennifer Hatchell, Saeko Hayashi, Martin Houde, Tsuyoshi Inoue, Shu-ichiro Inutsuka, Kazunari Iwasaki, Il-Gyo Jeong, Doug Johnstone, Ji-hyun Kang, Sung-ju Kang, Miju Kang, Akimasa Kataoka, Koji Kawabata, Francisca Kemper, Kee-Tae Kim, Jongsoo Kim, Tae-Soo Pyo, Lei Qian, Ramprasad Rao, Mark Rawlings, Jonathan Rawlings, Brendan Retter, John Richer, Andrew Rigby, Sarah Sadavoy, Hiro Saito, Giorgio Savini, Anna Scaife, Masumichi Seta, Gwanjeong Kim, Shinyoung Kim, Kyoung Hee Kim, Mi-Ryang Kim, Florian Kirchschlager, Jason Kirk, Masato I. N. Kobayashi, Patrick M. Koch, Vera Konyves, Takayoshi Kusune, Jungmi Kwon, Kevin Lacaille, Chi-Yan Law, Sang-Sung Lee, Yong-Hee Lee, Chin-Fei Lee, Jeong-Eun Lee, Hyeseung Lee, Chang Won Lee, Di Li, Hua-bai Li, Dalei Li, Hong-Li Liu, Junhao Liu, Tie Liu, Sheng-Yuan Liu, Xing Lu, A-Ran Lyo, Steve Mairs, Masafumi Matsumura, Brenda Matthews, Gerald Moriarty-Schieven, Tetsuya Nagata, Fumitaka Nakamura, Hiroyuki Nakanishi, Nagayoshi Ohashi, Takashi Onaka, Geumsook Park, Nicolas Peretto, Yoshito Shimajiri, Hiroko Shinnaga, Motohide Tamura, Ya-Wen Tang, Xindi Tang, Kohji Tomisaka, Yusuke Tsukamoto, Serena Viti, Hongchi Wang, Anthony Whitworth, Jinjin Xie, Hsi-Wei Yen, Hyunju Yoo, Jinghua Yuan, Hyeong-Sik Yun, Tetsuya Zenko, Yapeng Zhang, Chuan-Peng Zhang, Guoyin Zhang, Jianjun Zhou, Lei Zhu, Ilse De Looze, Philippe Andre, C. Darren Dowell, Stewart Eyres, Sam Falle, Jean-Francois Robitaille, and Sven van Loo. 2021. “Observations of Magnetic Fields Surrounding LkHα 101 Taken by the BISTRO Survey with JCMT-POL-2.” ASTROPHYSICAL JOURNAL 908 (1). doi:10.3847/1538-4357/abd0fc.
- Vancouver
- 1.Ngoc NB, Diep PN, Parsons H, Pattle K, Hoang T, Ward-Thompson D, et al. Observations of magnetic fields surrounding LkHα 101 taken by the BISTRO survey with JCMT-POL-2. ASTROPHYSICAL JOURNAL. 2021;908(1).
- IEEE
- [1]N. B. Ngoc et al., “Observations of magnetic fields surrounding LkHα 101 taken by the BISTRO survey with JCMT-POL-2,” ASTROPHYSICAL JOURNAL, vol. 908, no. 1, 2021.
@article{01JXCFPZV6DEAAX8NS0DR7VM9C, abstract = {{We report the first high spatial resolution measurement of magnetic fields surrounding LkH alpha 101, part of the Auriga-California molecular cloud. The observations were taken with the POL-2 polarimeter on the James Clerk Maxwell Telescope within the framework of the B-fields In Star-forming Region Observations (BISTRO) survey. Observed polarization of thermal dust emission at 850 mu m is found to be mostly associated with the redshifted gas component of the cloud. The magnetic field displays a relatively complex morphology. Two variants of the Davis-Chandrasekhar-Fermi method, unsharp masking and structure function, are used to calculate the strength of magnetic fields in the plane of the sky, yielding a similar result of B-POS similar to 115 mu G. The mass-to-magnetic-flux ratio in critical value units, lambda similar to 0.3, is the smallest among the values obtained for other regions surveyed by POL-2. This implies that the LkH alpha 101 region is subcritical, and the magnetic field is strong enough to prevent gravitational collapse. The inferred delta B/B-0 similar to 0.3 implies that the large-scale component of the magnetic field dominates the turbulent one. The variation of the polarization fraction with total emission intensity can be fitted by a power law with an index of alpha = 0.82 0.03, which lies in the range previously reported for molecular clouds. We find that the polarization fraction decreases rapidly with proximity to the only early B star (LkH alpha 101) in the region. Magnetic field tangling and the joint effect of grain alignment and rotational disruption by radiative torques can potentially explain such a decreasing trend.}}, articleno = {{10}}, author = {{Ngoc, Nguyen Bich and Diep, Pham Ngoc and Parsons, Harriet and Pattle, Kate and Hoang, Thiem and Ward-Thompson, Derek and Tram, Le Ngoc and Hull, Charles L. H. and Tahani, Mehrnoosh and Furuya, Ray and Bastien, Pierre and Qiu, Keping and Hasegawa, Tetsuo and Kwon, Woojin and Doi, Yasuo and Lai, Shih-Ping and Coude, Simon and Berry, David and Ching, Tao-Chung and Hwang, Jihye and Soam, Archana and Wang, Jia-Wei and Arzoumanian, Doris and Bourke, Tyler L. and Byun, Do-Young and Chen, Huei-Ru Vivien and Chen, Zhiwei and Chen, Wen Ping and Chen, Mike and Cho, Jungyeon and Choi, Yunhee and Choi, Minho and Chrysostomou, Antonio and Chung, Eun Jung and Dai, Sophia and Francesco, James Di and Duan, Yan and Duan, Hao-Yuan and Eden, David and Eswaraiah, Chakali and Fanciullo, Lapo and Fiege, Jason and Fissel, Laura M. and Franzmann, Erica and Friberg, Per and Friesen, Rachel and Fuller, Gary and Gledhill, Tim and Graves, Sarah and Greaves, Jane and Griffin, Matt and Gu, Qilao and Han, Ilseung and Hatchell, Jennifer and Hayashi, Saeko and Houde, Martin and Inoue, Tsuyoshi and Inutsuka, Shu-ichiro and Iwasaki, Kazunari and Jeong, Il-Gyo and Johnstone, Doug and Kang, Ji-hyun and Kang, Sung-ju and Kang, Miju and Kataoka, Akimasa and Kawabata, Koji and Kemper, Francisca and Kim, Kee-Tae and Kim, Jongsoo and Pyo, Tae-Soo and Qian, Lei and Rao, Ramprasad and Rawlings, Mark and Rawlings, Jonathan and Retter, Brendan and Richer, John and Rigby, Andrew and Sadavoy, Sarah and Saito, Hiro and Savini, Giorgio and Scaife, Anna and Seta, Masumichi and Kim, Gwanjeong and Kim, Shinyoung and Kim, Kyoung Hee and Kim, Mi-Ryang and Kirchschlager, Florian and Kirk, Jason and Kobayashi, Masato I. N. and Koch, Patrick M. and Konyves, Vera and Kusune, Takayoshi and Kwon, Jungmi and Lacaille, Kevin and Law, Chi-Yan and Lee, Sang-Sung and Lee, Yong-Hee and Lee, Chin-Fei and Lee, Jeong-Eun and Lee, Hyeseung and Lee, Chang Won and Li, Di and Li, Hua-bai and Li, Dalei and Liu, Hong-Li and Liu, Junhao and Liu, Tie and Liu, Sheng-Yuan and Lu, Xing and Lyo, A-Ran and Mairs, Steve and Matsumura, Masafumi and Matthews, Brenda and Moriarty-Schieven, Gerald and Nagata, Tetsuya and Nakamura, Fumitaka and Nakanishi, Hiroyuki and Ohashi, Nagayoshi and Onaka, Takashi and Park, Geumsook and Peretto, Nicolas and Shimajiri, Yoshito and Shinnaga, Hiroko and Tamura, Motohide and Tang, Ya-Wen and Tang, Xindi and Tomisaka, Kohji and Tsukamoto, Yusuke and Viti, Serena and Wang, Hongchi and Whitworth, Anthony and Xie, Jinjin and Yen, Hsi-Wei and Yoo, Hyunju and Yuan, Jinghua and Yun, Hyeong-Sik and Zenko, Tetsuya and Zhang, Yapeng and Zhang, Chuan-Peng and Zhang, Guoyin and Zhou, Jianjun and Zhu, Lei and De Looze, Ilse and Andre, Philippe and Dowell, C. Darren and Eyres, Stewart and Falle, Sam and Robitaille, Jean-Francois and van Loo, Sven}}, issn = {{0004-637X}}, journal = {{ASTROPHYSICAL JOURNAL}}, keywords = {{MOLECULAR CLOUD,DUST POLARIZATION,GRAIN ALIGNMENT,EMBEDDED PROTOSTARS,RHO OPHIUCHI,H-I,1ST,SCUBA-2,SUBMILLIMETER,FILAMENT,Interstellar magnetic fields,Molecular clouds,Star formation,845,1072,1569,Astrophysics - Astrophysics of Galaxies,Astrophysics - Solar and Stellar Astrophysics}}, language = {{eng}}, number = {{1}}, pages = {{20}}, title = {{Observations of magnetic fields surrounding LkHα 101 taken by the BISTRO survey with JCMT-POL-2}}, url = {{http://doi.org/10.3847/1538-4357/abd0fc}}, volume = {{908}}, year = {{2021}}, }
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