First Results from BISTRO: A SCUBA-2 Polarimeter Survey of the Gould Belt
- Jeremiah Horrocks Institute, University of Central Lancashire, Preston PR1 2HE (United Kingdom)
- Centre de recherche en astrophysique du Québec and département de physique, Université de Montréal, C.P. 6128, Succ. Centre-ville, Montréal, QC, H3C 3J7 (Canada)
- Tokushima University, Minami Jousanajima-machi 1-1, Tokushima 770-8502 (Japan)
- Korea Astronomy and Space Science Institute, 776 Daedeokdae-ro, Yuseong-gu, Daejeon 34055 (Korea, Republic of)
- Institute of Astronomy and Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan (China)
- School of Astronomy and Space Science, Nanjing University, 163 Xianlin Avenue, Nanjing 210023 (China)
- East Asian Observatory, 660 N. A‘ohōkū Place, University Park, Hilo, HI 96720 (United States)
- NRC Herzberg Astronomy and Astrophysics, 5071 West Saanich Road, Victoria, BC V9E 2E7 (Canada)
- Department of Physics and Astronomy, The University of Manitoba, Winnipeg, Manitoba R3T2N2 (Canada)
- School of Physics and Astronomy, Cardiff University, The Parade, Cardiff, CF24 3AA (United Kingdom)
- Department of Physics and Astronomy, The University of Western Ontario, 1151 Richmond Street, London N6A 3K7 (Canada)
We present the first results from the B-fields In STar-forming Region Observations (BISTRO) survey, using the Sub-millimetre Common-User Bolometer Array 2 camera, with its associated polarimeter (POL-2), on the James Clerk Maxwell Telescope in Hawaii. We discuss the survey’s aims and objectives. We describe the rationale behind the survey, and the questions that the survey will aim to answer. The most important of these is the role of magnetic fields in the star formation process on the scale of individual filaments and cores in dense regions. We describe the data acquisition and reduction processes for POL-2, demonstrating both repeatability and consistency with previous data. We present a first-look analysis of the first results from the BISTRO survey in the OMC 1 region. We see that the magnetic field lies approximately perpendicular to the famous “integral filament” in the densest regions of that filament. Furthermore, we see an “hourglass” magnetic field morphology extending beyond the densest region of the integral filament into the less-dense surrounding material, and discuss possible causes for this. We also discuss the more complex morphology seen along the Orion Bar region. We examine the morphology of the field along the lower-density northeastern filament. We find consistency with previous theoretical models that predict magnetic fields lying parallel to low-density, non-self-gravitating filaments, and perpendicular to higher-density, self-gravitating filaments.
- OSTI ID:
- 22663500
- Journal Information:
- Astrophysical Journal, Vol. 842, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
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