摘要
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.
原文 | ???core.languages.en_GB??? |
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文章編號 | 4 |
期刊 | Astrophysical Journal |
卷 | 859 |
發行號 | 1 |
DOIs | |
出版狀態 | 已出版 - 20 5月 2018 |
指紋
深入研究「A First Look at BISTRO Observations of the ρ Oph-A core」主題。共同形成了獨特的指紋。資料集
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First-look analysis of {rho} Oph-A at 850um
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DOI: 10.26093/cds/vizier.18590004, https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/859/4
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