A First Look at BISTRO Observations of The $ρ$ Oph-A core
Creators: name: Kwon, Jungmi
name: Doi, Yasuo
name: Tamura, Motohide
name: Matsumura, Masafumi
name: Pattle, Kate
name: Berry, David
name: Sadavoy, Sarah
name: Matthews, Brenda C.
name: Ward-Thompson, Derek
name: Hasegawa, Tetsuo
name: Furuya, Ray S.
name: Pon, Andy
name: Di Francesco, James
name: Arzoumanian, Doris
name: Hayashi, Saeko S.
name: Kawabata, Koji S.
name: Onaka, Takashi
name: Choi, Minho
name: Kang, Miju
name: Hoang, Thiem
name: Lee, Chang Won
name: Lee, Sang-Sung
name: Liu, Hong-Li
name: Liu, Tie
name: Inutsuka, Shu-Ichiro
name: Eswaraiah, Chakali
name: Bastien, Pierre
name: Kwon, Woojin
name: Lai, Shih-Ping
name: Qiu, Keping
name: Coude, Simon
name: Franzmann, Erica
name: Friberg, Per
name: Graves, Sarah F.
name: Greaves, Jane S.
name: Houde, Martin
name: Johnstone, Doug
name: Kirk, Jason M.
name: Koch, Patrick M.
name: Li, Di
name: Parsons, Harriet
name: Rao, Ramprasad
name: Rawlings, Mark
name: Shinnaga, Hiroko
name: Van Loo, Sven
name: Aso, Yusuke
name: Byun, Do-Young
name: Chen, Huei-Ru
name: Chen, Mike C. -Y.
name: Chen, Wen Ping
name: Ching, Tao-Chung
name: Cho, Jungyeon
name: Chrysostomou, Antonio
name: Chung, Eun Jung
name: Drabek-Maunder, Emily
name: Eyres, Stewart P. S.
name: Fiege, Jason
name: Friesen, Rachel K.
name: Fuller, Gary
name: Gledhill, Tim
name: Griffin, Matt J.
name: Gu, Qilao
name: Hatchell, Jennifer
name: Holland, Wayne
name: Inoue, Tsuyoshi
name: Iwasaki, Kazunari
name: Jeong, Il-Gyo
name: Kang, Ji-Hyun
name: Kang, Sung-Ju
name: Kemper, Francisca
name: Kim, Gwanjeong
name: Kim, Jongsoo
name: Kim, Kee-Tae
name: Kim, Kyoung Hee
name: Kim, Mi-Ryang
name: Kim, Shinyoung
name: Lacaille, Kevin M.
name: Lee, Jeong-Eun
name: Li, Dalei
name: Li, Hua-Bai
name: Liu, Junhao
name: Liu, Sheng-Yuan
name: Lyo, A-Ran
name: Mairs, Steve
name: Moriarty-Schieven, Gerald H.
name: Nakamura, Fumitaka
name: Nakanishi, Hiroyuki
name: Ohashi, Nagayoshi
name: Peretto, Nicolas
name: Pyo, Tae-Soo
name: Qian, Lei
name: Retter, Brendan
name: Richer, John
name: Rigby, Andrew
name: Robitaille, Jean-Franois
name: Savini, Giorgio
name: Scaife, Anna M. M.
name: Soam, Archana
name: Tang, Ya-Wen
name: Tomisaka, Kohji
name: Wang, Hongchi
name: Wang, Jia-Wei
name: Whitworth, Anthony P.
name: Yen, Hsi-Wei
name: Yoo, Hyunju
name: Yuan, Jinghua
name: Zhang, Chuan-Peng
name: Zhang, Guoyin
name: Zhou, Jianjun
name: Zhu, Lei
name: Andre, Philippe
name: Dowell, C. Darren
name: Falle, Sam
name: Tsukamoto, Yusuke
name: Nakagawa, Takao
name: Kanamori, Yoshihiro
name: Kataoka, Akimasa
name: Kobayashi, Masato I. N.
name: Nagata, Tetsuya
name: Saito, Hiro
name: Seta, Masumichi
name: Zenko, Tetsuya
Publisher: name: arXiv
Year: 2018
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We present 850 $μ$m 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, BISTRO (B-fields In STar forming RegiOns). 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 percents, 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 ($&gt; 5 \%$). A comparison with previous near-infrared polarimetric data shows that there are several magnetic field components which are consistent at near-infrared and submillimeter wavelengths. Using the Davis-Chandrasekhar-Fermi method, we also derive magnetic field strengths in several sub-core regions, which range from approximately 0.2 to 5 mG. We also find a correlation between the magnetic field orientations projected on the sky with the core centroid velocity components.
description: 22 pages, 11 figures, accepted for publication in ApJ