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 language | English |
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Article number | 4 |
Journal | Astrophysical Journal |
Volume | 859 |
Issue number | 1 |
DOIs | |
State | Published - 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
Kwon, J. (Creator), Doi, Y. (Creator), Tamura, M. (Creator), Matsumura, M. (Creator), Pattle, K. (Creator), Berry, D. (Creator), Sadavoy, S. (Creator), Matthews, B. C. (Creator), Ward-Thompson, D. (Creator), Hasegawa, T. (Creator), Furuya, R. S. (Creator), Pon, A. (Creator), Francesco, J. D. (Contributor), Arzoumanian, D. (Creator), Hayashi, S. S. (Creator), Kawabata, K. S. (Creator), Onaka, T. (Creator), Choi, M. (Creator), Kang, M. (Creator), Hoang, T. (Creator), Lee, C. W. (Creator), Lee, S.-S. (Creator), Liu, H.-L. (Creator), Liu, T. (Creator), Inutsuka, S.-I. (Creator), Eswaraiah, C. (Creator), Bastien, P. (Creator), Kwon, W. (Creator), Lai, S.-P. (Creator), Qiu, K. (Creator), Coudé, S. (Contributor), Franzmann, E. (Creator), Friberg, P. (Creator), Graves, S. F. (Creator), Greaves, J. S. (Creator), Houde, M. (Creator), Johnstone, D. (Creator), Kirk, J. M. (Creator), Koch, P. M. (Creator), Li, D. (Creator), Parsons, H. (Creator), Rao, R. (Creator), Rawlings, M. G. (Creator), Shinnaga, H. (Creator), Loo, S. V. (Contributor), Aso, Y. (Creator), Byun, D.-Y. (Creator), Chen, H.-R. (Creator), Chen, M.C.-Y. (Creator), Chen, W. P. (Creator), Ching, T.-C. (Creator), Cho, J. (Creator), Chrysostomou, A. (Creator), Chung, E. J. (Creator), Drabek-Maunder, E. (Creator), Eyres, S. P. S. (Contributor), Fiege, J. (Creator), Friesen, R. K. (Creator), Fuller, G. (Creator), Gledhill, T. (Creator), Griffin, M. J. (Creator), Gu, Q. (Creator), Hatchell, J. (Creator), Holland, W. (Creator), Inoue, T. (Creator), Iwasaki, K. (Creator), Jeong, I.-G. (Creator), Kang, J.-H. (Creator), Kang, S.-J. (Creator), Kemper, F. (Creator), Kim, G. (Creator), Kim, J. (Creator), Kim, K.-T. (Creator), Kim, K. H. (Creator), Kim, M.-R. (Creator), Kim, S. (Creator), Lacaille, K. M. (Creator), Lee, J.-E. (Creator), Li, H.-B. (Creator), Liu, J. (Creator), Liu, S.-Y. (Creator), Lyo, A.-R. (Creator), Mairs, S. (Creator), Moriarty-Schieven, G. H. (Creator), Nakamura, F. (Creator), Nakanishi, H. (Creator), Ohashi, N. (Creator), Peretto, N. (Creator), Pyo, T.-S. (Creator), Qian, L. (Creator), Retter, B. (Creator), Richer, J. (Creator), Rigby, A. (Creator), Robitaille, J.-F. (Creator), Savini, G. (Creator), Scaife, A. M. M. (Contributor), Soam, A. (Creator), Tang, Y.-W. (Creator), Tomisaka, K. (Creator), Wang, H. (Creator), Wang, J.-W. (Creator), Whitworth, A. P. (Creator), Yen, H.-W. (Creator), Yoo, H. (Creator), Yuan, J. (Creator), Zhang, C.-P. (Creator), Zhang, G. (Creator), Zhou, J. (Creator), Zhu, L. (Creator), André, P. (Contributor), Dowell, C. D. (Creator), Falle, S. (Creator), Tsukamoto, Y. (Creator), Nakagawa, T. (Creator), Kanamori, Y. (Creator), Kataoka, A. (Creator), Kobayashi, M. I. N. (Contributor), Nagata, T. (Creator), Saito, H. (Creator), Seta, M. (Creator) & Zenko, T. (Creator), Centre de Donnees Strasbourg (CDS), 2019
DOI: 10.26093/cds/vizier.18590004, https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/859/4
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