期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 449, 期 3, 页码 2368-2373出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stv461
关键词
Magnetic fields; polarization; stars: AGB and post-AGB; stars: individual: OH 231.8+4.2
资金
- CONACYT [CB-2011-01-0168078]
- University of Guadalajara (Mexico) [PIFI-2014]
- NSF Graduate Fellowship
- Ford Foundation Dissertation Fellowship
- PAPIIT-DGAPA-UNAM [107914]
- Gordon and Betty Moore Foundation
- Kenneth T. and Eileen L. Norris Foundation
- James S. McDonnell Foundation
- Associates of the California Institute of Technology
- University of Chicago
- state of California
- state of Illinois
- state of Maryland
- National Science Foundation
- NASA [NAS 5-26555]
- STFC [ST/L000768/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/L000768/1] Funding Source: researchfish
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [1139950, 1140031] Funding Source: National Science Foundation
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [1140063, 1140019, 1139998] Funding Source: National Science Foundation
In order to investigate the characteristics and influence of the magnetic field in evolved stars, we performed a follow-up investigation of our previous submillimetre analysis of the protoplanetary nebula (PPN) OH231.8+4.2, this time at 1.3mmwith the CARMA(Combined Array for Research in Millimeter-wave Astronomy) facility in polarization mode for the purpose of a multiscale analysis. OH 231.8+4.2 was observed at similar to 2.5 arcsec resolution, and we detected polarized emission above the 3s threshold (with a mean polarization fraction of 3.5 per cent). The polarization map indicates an overall organized magnetic field within the nebula. The main finding in this paper is the presence of a structure mostly compatible with an ordered toroidal component that is aligned with the PPN's dark lane. We also present some alternative magnetic field configuration to explain the structure observed. These data complete our previous SMA submillimetre data for a better investigation and understanding of the magnetic field structure in OH 231.8+4.2.
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