The Global Magneto-Ionic Medium Survey: Polarimetry of the Southern Sky from 300 to 480 MHz

doi:10.3847/1538-3881/ab22b0

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	The Global Magneto-Ionic Medium Survey: Polarimetry of the Southern Sky from 300 to 480 MHz
	Wolleben,M.2,3; Landecker,T. L.2; Carretti,E.4,5; Dickey,J. M.6; Fletcher,A.7; McClure-Griffiths,N. M.8; McConnell,D.4; Thomson,A. J. M.8; Hill,A. S.1,2,9; Gaensler,B. M.10,11
刊名	The Astronomical Journal
	2019-07-02
卷号	158 期号:1
关键词	Galaxy: general instrumentation: polarimeters ISM: magnetic fields radio continuum: ISM surveys techniques: polarimetric
ISSN号	0004-6256
DOI	10.3847/1538-3881/ab22b0
英文摘要	Abstract Much data on the Galactic polarized radio emission has been gathered in the last five decades. All-sky surveys have been made, but only in narrow, widely spaced frequency bands—and the data are inadequate for the characterization of Faraday rotation, the main determinant of the appearance of the polarized radio sky at decimeter wavelengths. We describe a survey of polarized radio emission from the southern sky, aiming to characterize the magneto-ionic medium, particularly the strength and configuration of the magnetic field. This work is part of the Global Magneto-Ionic Medium Survey (GMIMS). We have designed and built a feed and receiver covering the band 300–900 MHz for the CSIRO Parkes 64 m Telescope. We have surveyed the entire sky between decl. ?90° and +20°. We present data covering 300–480 MHz with angular resolution 81′–45′. The survey intensity scale is absolutely calibrated, based on measurements of resistors at known temperatures and on an assumed flux density and spectral index for Taurus A. Data are presented as brightness temperatures. We have applied Rotation Measure Synthesis to the data to obtain a Faraday depth cube of resolution 5.9 rad m?2, sensitivity of 60 mK of polarized intensity, and angular resolution 1.°35. The data presented in this paper are available at the Canadian Astronomy Data Centre.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-6256-158-1-AB22B0
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/27002]
专题	中国科学院国家天文台
作者单位	1.Space Science Institute, Boulder, CO 80301, USA 2.National Research Council Canada, Herzberg Research Centre for Astronomy and Astrophysics, Dominion Radio Astrophysical Observatory, P.O. Box 248, Penticton, British Columbia, V2A 6J9, Canada 3.Skaha Remote Sensing, 3165 Juniper Drive, Naramata, British Columbia, V0H 1N0, Canada 4.CSIRO Astronomy & Space Science, P.O. Box 76, Epping, New South Wales 1710, Australia 5.INAF—Istituto di Radioastronomia, via P. Gobetti 101, I-40129 Bologna, Italy 6.University of Tasmania, School of Mathematics and Physics, Hobart, Tasmania 7001, Australia 7.School of Mathematics, Statistics and Physics, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK 8.Research School of Astronomy and Astrophysics, Australian National University, Canberra, Australian Capital Territory 2611, Australia 9.Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, British Columbia, V6T 1Z1, Canada 10.Sydney Institute for Astronomy, School of Physics, University of Sydney, Sydney, New South Wales 2006, Australia
推荐引用方式 GB/T 7714	Wolleben,M.,Landecker,T. L.,Carretti,E.,et al. The Global Magneto-Ionic Medium Survey: Polarimetry of the Southern Sky from 300 to 480 MHz[J]. The Astronomical Journal,2019,158(1).
APA	Wolleben,M..,Landecker,T. L..,Carretti,E..,Dickey,J. M..,Fletcher,A..,...&Taylor,A. R..(2019).The Global Magneto-Ionic Medium Survey: Polarimetry of the Southern Sky from 300 to 480 MHz.The Astronomical Journal,158(1).
MLA	Wolleben,M.,et al."The Global Magneto-Ionic Medium Survey: Polarimetry of the Southern Sky from 300 to 480 MHz".The Astronomical Journal 158.1(2019).