A First Look at BISTRO Observations of the ρ Oph-A core
文献类型：期刊论文
| 作者 | Kwon,Jungmi1; Doi,Yasuo2; Tamura,Motohide3,4,5; Matsumura,Masafumi6; Pattle,Kate5,7,8; Berry,David9; Sadavoy,Sarah10; Matthews,Brenda C.11,12; Ward-Thompson,Derek7; Hasegawa,Tetsuo5 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2018-05-16 |
| 卷号 | 859期号:1 |
| ISSN号 | 0004-637X |
| 关键词 | circumstellar matter ISM: individual objects (Ophiuchi) ISM: structure polarization radio continuum: ISM stars: formation |
| DOI | 10.3847/1538-4357/aabd82 |
| 英文摘要 | 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. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-859-1-AABD82 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/23464]  |
| 专题 | 中国科学院紫金山天文台 |
| 作者单位 | 1.Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japanjungmi.kwon@ir.isas.jaxa.jp 2.Department of Earth Science and Astronomy, Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro, Tokyo 153-8902, Japan 3.Department of Astronomy, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan 4.Astrobiology Center, National Institutes of Natural Sciences, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan 5.National Astronomical Observatory of Japan, National Institutes of Natural Sciences, Osawa, Mitaka, Tokyo 181-8588, Japan 6.Faculty of Education, Kagawa University, Saiwai-cho 1-1, Takamatsu, Kagawa, 760-8522, Japan 7.Jeremiah Horrocks Institute, University of Central Lancashire, Preston PR1 2HE, UK 8.Institute of Astronomy and Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan 9.East Asian Observatory, 660 N. A‘ohōkū Place, University Park, Hilo, HI 96720, USA 10.Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA |
| 推荐引用方式 GB/T 7714 | Kwon,Jungmi,Doi,Yasuo,Tamura,Motohide,et al. A First Look at BISTRO Observations of the ρ Oph-A core[J]. The Astrophysical Journal,2018,859(1). |
| APA | Kwon,Jungmi.,Doi,Yasuo.,Tamura,Motohide.,Matsumura,Masafumi.,Pattle,Kate.,...&Zenko,Tetsuya.(2018).A First Look at BISTRO Observations of the ρ Oph-A core.The Astrophysical Journal,859(1). |
| MLA | Kwon,Jungmi,et al."A First Look at BISTRO Observations of the ρ Oph-A core".The Astrophysical Journal 859.1(2018). |
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