The effect of the magnetic field locally on gas in the Milky Way Galaxy Pattle et al., 2015, MNRAS, 450, 1094 Derek Ward-Thompson Jeremiah Horrocks Institute, University of Central Lancashire Gas in Galaxies Meeting, Malta, 2017 October 3 rd
Molecular gas freeze-out X = C17O, 0 = C18O, + = 850um dust (Redman et al 2002 MNRAS 337, L17)
Ions freeze out less(?) Ward-Thompson et al. 1996, MNRAS 281, L53
Affects how well gas couples to B-field Tritsis et al 2015 MNRAS 451, 4384
Filament growth Palmeirim et al., 2013, A&A, 550, A38
Cores form on filaments Andre et al., 2014, PPVI, pp.27-51
Pierre Bastien Dalei Li Yusuke Aso Do-Young Byun Vivien Chen Mike Chen Di Li Yasuo Doi Jungyeon Cho Wen Ping Chen Simon Coude Hua-Bai Li Ray Furuya Minho Choi Tao-Chung Ching James Di Francesco Hong-Li Liu Tetsuo Hasegawa Eun Jung Chung Chakali Eswaraiah Jason Fiege Junhao Liu Saeko Hayashi Il-Gyo Jeong Ciska Kemper Rachel Friesen Lei Qian Tsuyoshi Inoue Ji-hyun Kang Patrick Koch Martin Houde Keping Qiu Shu-ichiro Inutsuka Miju Kang Shih-Ping Lai Doug Johnstone Hongchi Wang Kazunari Iwasaki Sung-ju Kang Sheng-Yuan Liu Kevin Lacaille Jinghua Yuan Koji Kawabata Gwanjeong Kim Ramprasad Rao Brenda Matthews Chuan-Peng Zhang Jungmi Kwon Jongsoo Kim Ya-Wen Tang Andy Pon Guoyin Zhang Masafumi Matsumura Kee-Tae Kim Jia-Wei Wang Gerald Schieven Jianjun Zhou Fumitaka Nakamura Kyoung Hee Kim Hsi-Wei Yen Lei Zhu Hiroyuki Nakanishi Shinyoung Kim Quang Nguyen-Luong Woojin Kwon Nagayoshi Ohashi Chang Won Lee Takashi Onaka Jeong-Eun Lee Tae-Soo Pyo Sang-Sung Lee Hiroko Shinnaga Tie Liu Motohide Tamura ARan Lyo Kohji Tomisaka Archana Soam Antonio Chrysostomou Wayne Holland Emily Drabek-Maunder Jason Kirk Sam Falle Stewart Eyres Kate Pattle Sven van Loo Gary Fuller Nicolas Peretto Joe Mottram Tim Gledhill John Richer, Sarah Sadavoy Jane Greaves Andrew Rigby Yusuke Tsukamoto Matt Griffin Jean-Francois Robitaille Jennifer Hatchell Giorgio Savini, Anna Scaife David Berry Harriett Parsons Derek Ward-Thompson Per Friberg Mark Rawlings Anthony Whitworth Sarah Graves
Orion A Ward-Thompson et al 2017 ApJ 842, 66
A magnetic ‘spring’ Pattle et al 2017 ApJ 846, 122
Orion Bar Ward-Thompson et al 2017 ApJ 842, 66
N-E filament Ward-Thompson et al 2017 ApJ 842, 66
Ophiuchus – L1688 Pattle et al. 2015, MNRAS, 450, 1094
Conclusions • The story before BISTRO: • Clouds become filamentary, form cores & stars • B- fields could be responsible for ‘funnelling’ • Ionization fraction affects SFR • BISTRO goals: • What role do B-fields play inside filaments & cores? • Are B-fields dominant? • What is the dense gas ionization fraction? • BISTRO-2 will go out to 2 kpc
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