A First Look at BISTRO Observations of the ρ Oph-A core

Jungmi Kwon, Yasuo Doi, Motohide Tamura, Masafumi Matsumura, Kate Pattle, David Berry, Sarah Sadavoy, Brenda C. Matthews, Derek Ward-Thompson, Tetsuo Hasegawa, Ray S. Furuya, Andy Pon, James Di Francesco, Doris Arzoumanian, Saeko S. Hayashi, Koji S. Kawabata, Takashi Onaka, Minho Choi, Miju Kang, Thiem HoangChang Won Lee, Sang Sung Lee, Hong Li Liu, Tie Liu, Shu Ichiro Inutsuka, Chakali Eswaraiah, Pierre Bastien, Woojin Kwon, Shih Ping Lai, Keping Qiu, Simon Coudé, Erica Franzmann, Per Friberg, Sarah F. Graves, Jane S. Greaves, Martin Houde, Doug Johnstone, Jason M. Kirk, Patrick M. Koch, Di Li, Harriet Parsons, Ramprasad Rao, Mark G. Rawlings, Hiroko Shinnaga, Sven Van Loo, Yusuke Aso, Do Young Byun, Huei Ru Chen, Mike C.Y. Chen, Wen Ping Chen, Tao Chung Ching, Jungyeon Cho, Antonio Chrysostomou, Eun Jung Chung, Emily Drabek-Maunder, Stewart P.S. Eyres, Jason Fiege, Rachel K. Friesen, Gary Fuller, Tim Gledhill, Matt J. Griffin, Qilao Gu, Jennifer Hatchell, Wayne Holland, Tsuyoshi Inoue, Kazunari Iwasaki, Il Gyo Jeong, Ji Hyun Kang, Sung Ju Kang, Francisca Kemper, Gwanjeong Kim, Jongsoo Kim, Kee Tae Kim, Kyoung Hee Kim, Mi Ryang Kim, Shinyoung Kim, Kevin M. Lacaille, Jeong Eun Lee, Dalei Li, Hua Bai Li, Junhao Liu, Sheng Yuan Liu, A. Ran Lyo, Steve Mairs, Gerald H. Moriarty-Schieven, Fumitaka Nakamura, Hiroyuki Nakanishi, Nagayoshi Ohashi, Nicolas Peretto, Tae Soo Pyo, Lei Qian, Brendan Retter, John Richer, Andrew Rigby, Jean Franois Robitaille, Giorgio Savini, Anna M.M. Scaife, Archana Soam, Ya Wen Tang, Kohji Tomisaka, Hongchi Wang, Jia Wei Wang, Anthony P. Whitworth, Hsi Wei Yen, Hyunju Yoo, Jinghua Yuan, Chuan Peng Zhang, Guoyin Zhang, Jianjun Zhou, Lei Zhu, Philippe André, C. Darren Dowell, Sam Falle, Yusuke Tsukamoto, Takao Nakagawa, Yoshihiro Kanamori, Akimasa Kataoka, Masato I.N. Kobayashi, Tetsuya Nagata, Hiro Saito, Masumichi Seta, Tetsuya Zenko

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Abstract

We present 850 μm imaging polarimetry data of the ρ Oph-A core taken with the Submillimeter Common-User Bolometer Array-2 (SCUBA-2) and its polarimeter (POL-2) as part of our ongoing survey project, -fields In STar forming RegiOns (BISTRO). The polarization vectors are used to identify the orientation of the magnetic field projected on the plane of the sky at a resolution of 0.01 pc. We identify 10 subregions with distinct polarization fractions and angles in the 0.2 pc ρ Oph-A core; some of them can be part of a coherent magnetic field structure in the ρ Oph region. The results are consistent with previous observations of the brightest regions of ρ Oph-A, where the degrees of polarization are at a level of a few percent, but our data reveal for the first time the magnetic field structures in the fainter regions surrounding the core where the degree of polarization is much higher (>5%). A comparison with previous near-infrared polarimetric data shows that there are several magnetic field components that are consistent at near-infrared and submillimeter wavelengths. Using the Davis-Chandrasekhar-Fermi method, we also derive magnetic field strengths in several subcore regions, which range from approximately 0.2 to 5 mG. We also find a correlation between the magnetic field orientations projected on the sky and the core centroid velocity components.

Original languageEnglish
Article number4
JournalAstrophysical Journal
Volume859
Issue number1
DOIs
StatePublished - 20 May 2018

Keywords

  • ISM: individual objects (Ophiuchi)
  • ISM: structure
  • circumstellar matter
  • polarization
  • radio continuum: ISM
  • stars: formation

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  • First-look analysis of {rho} Oph-A at 850um

    Saito, H. (Creator), Pon, A. (Creator), Pattle, K. (Creator), Kang, M. (Creator), Zenko, T. (Creator), Liu, T. (Creator), Kobayashi, M. I. N. (Contributor), Kataoka, A. (Creator), Francesco, J. D. (Contributor), Eyres, S. P. S. (Contributor), Franzmann, E. (Creator), Sadavoy, S. (Creator), Liu, S. (Creator), Iwasaki, K. (Creator), Koch, P. M. (Creator), Parsons, H. (Creator), Richer, J. (Creator), Tamura, M. (Creator), Coud?, S. (Contributor), Chung, E. J. (Creator), Lee, J. (Creator), Nakagawa, T. (Creator), Yuan, J. (Creator), Gledhill, T. (Creator), Ohashi, N. (Creator), Friesen, R. K. (Creator), Furuya, R. S. (Creator), Chen, M. C. (Creator), Jeong, I. (Creator), Drabek-Maunder, E. (Creator), Li, D. (Creator), Fuller, G. (Creator), Hoang, T. (Creator), Graves, S. F. (Creator), Johnstone, D. (Creator), Friberg, P. (Creator), Robitaille, J. (Creator), Qiu, K. (Creator), Zhu, L. (Creator), Wang, H. (Creator), Matthews, B. C. (Creator), Rigby, A. (Creator), Rawlings, M. G. (Creator), Kang, S. (Creator), Nakanishi, H. (Creator), Loo, S. V. (Contributor), Kim, K. H. (Creator), Lyo, A. (Creator), Moriarty-Schieven, G. H. (Creator), Kwon, W. (Creator), Houde, M. (Creator), Kwon, J. (Creator), Zhou, J. (Creator), Lee, C. W. (Creator), Yen, H. (Creator), Chen, H. (Creator), Zhang, C. (Creator), Gu, Q. (Creator), Tomisaka, K. (Creator), Kawabata, K. S. (Creator), Mairs, S. (Creator), Ward-Thompson, D. (Creator), Inutsuka, S. (Creator), Li, H. (Creator), Liu, J. (Creator), Bastien, P. (Creator), Griffin, M. J. (Creator), Eswaraiah, C. (Creator), Hayashi, S. S. (Creator), Kim, K. (Creator), Andr?, P. (Contributor), Dowell, C. D. (Creator), Onaka, T. (Creator), Kim, J. (Creator), Hatchell, J. (Creator), Peretto, N. (Creator), Liu, H. (Creator), Doi, Y. (Creator), Kanamori, Y. (Creator), Li, D. (Creator), Rao, R. (Creator), Fiege, J. (Creator), Kim, G. (Creator), Soam, A. (Creator), Holland, W. (Creator), Seta, M. (Creator), Shinnaga, H. (Creator), Chrysostomou, A. (Creator), Byun, D. (Creator), Qian, L. (Creator), Chen, W. (Creator), Inoue, T. (Creator), Kim, S. (Creator), Nagata, T. (Creator), Nakamura, F. (Creator), Whitworth, A. P. (Creator), Arzoumanian, D. (Creator), Kirk, J. M. (Creator), Tsukamoto, Y. (Creator), Falle, S. (Creator), Ching, T. (Creator), Kim, M. (Creator), Tang, Y. (Creator), Cho, J. (Creator), Wang, J. (Creator), Kemper, F. (Creator), Greaves, J. S. (Creator), Matsumura, M. (Creator), Lai, S. (Creator), Pyo, T. (Creator), Savini, G. (Creator), Yoo, H. (Creator), Retter, B. (Creator), Lacaille, K. M. (Creator), Lee, S. (Creator), Hasegawa, T. (Creator), Kang, J. (Creator), Scaife, A. M. M. (Contributor), Choi, M. (Creator), Berry, D. (Creator), Zhang, G. (Creator) & Aso, Y. (Creator), Centre de Donnees Strasbourg (CDS), 2018

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