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Extended Catalog of...
Extended Catalog of Winged or X-shaped Radio Sources from the FIRST Survey
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- Yang, Xiaolong (author)
- Beijing University of Technology
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- Joshi, Ravi (author)
- Beijing University of Technology
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- Gopal-Krishna, (author)
- University of Mumbai,Aryabhatta Research Institute of Observational Sciences
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- An, Tao (author)
- Chinese Academy of Sciences
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- Ho, Luis C. (author)
- Beijing University of Technology
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Wiita, Paul J. (author)
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- Liu, Xiang (author)
- Chinese Academy of Sciences
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- Yang, Jun, 1979 (author)
- Chinese Academy of Sciences,Chalmers tekniska högskola,Chalmers University of Technology
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- Wang, Ran (author)
- Beijing University of Technology
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- Wu, Xue-Bing (author)
- Beijing University of Technology
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- Yang, Xiaofeng (author)
- Chinese Academy of Sciences
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(creator_code:org_t)
- 2019-11-15
- 2019
- English.
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In: Astrophysical Journal, Supplement Series. - : American Astronomical Society. - 1538-4365 .- 0067-0049. ; 245:1
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Abstract
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- We present a catalog of 290 ?winged? or X-shaped radio galaxies (XRGs) extracted from the latest (2014 December 17) data release of the ?Very Large Array Faint Images of the Radio Sky at Twenty centimeter.? We have combined these radio images with their counterparts in the TIFR GMRT sky survey at 150 MHz, in an attempt to identify any low surface brightness radio emission present in these sources. This has enabled us to assemble a sample of 106 ?strong? XRG candidates and 184 ?probable? XRG candidates whose XRG designation needs to be verified by further observations. The present sample of 290 XRG candidates is almost twice as large as the number of XRGs currently known. Twenty-five of our 290 XRG candidates (9 ?strong? and 16 ?probable?) are identified as quasars. Double-peaked narrow emission lines are seen in the optical spectra of three of the XRG candidates (two ?strong? and one ?probable?). Nearly 90% of the sample is located in the FR II domain of the Owen?Ledlow diagram. A few of the strong XRG candidates have a rather flat radio spectrum (spectral index ? flatter than ?0.3) between 150 MHz and 1.4 GHz, or between 1.4 and 5 GHz. Since this is not expected for lobe-dominated extragalactic radio sources (like nearly all known XRGs), these sources are particularly suited for follow-up radio imaging and near-simultaneous measurement of the radio spectrum.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Medicinteknik -- Medicinsk laboratorie- och mätteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Medical Engineering -- Medical Laboratory and Measurements Technologies (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Keyword
- Quasars
- Radio continuum emission
- Active galactic nuclei
- Catalogs
- Surveys
- Jets
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Yang, Xiaolong
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Joshi, Ravi
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Gopal-Krishna,
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An, Tao
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Ho, Luis C.
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Wiita, Paul J.
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show more...
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Liu, Xiang
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Yang, Jun, 1979
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Wang, Ran
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Wu, Xue-Bing
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Yang, Xiaofeng
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show less...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Physical Science ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Atom and Molecul ...
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Chalmers University of Technology