X-shaped radio galaxies from FIRST Virtual Observatory Resource

Authors
  1. Yang X.
  2. Joshi R.
  3. Gopal-Krishna
  4. An T.
  5. Ho L.C.
  6. Wiita P.J.
  7. Liu X.,Yang J.
  8. Wang R.
  9. Wu X.-B.
  10. Yang X.
  11. Published by
    CDS
Abstract

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 150MHz, 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 {alpha} flatter than -0.3) between 150MHz and 1.4GHz, or between 1.4 and 5GHz. 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.

Keywords
  1. radio-galaxies
  2. radio-continuum-emission
  3. absolute-magnitude
  4. quasars
  5. redshifted
  6. visible-astronomy
  7. sloan-photometry
  8. galaxy-classification-systems
  9. active-galactic-nuclei
Bibliographic source Bibcode
2019ApJS..245...17Y
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/245/17
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJS/245/17
Document Object Identifer DOI
doi:10.26093/cds/vizier.22450017

Access

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http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/245/17
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http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/245/17/table2?
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History

2020-05-14T07:14:00Z
Resource record created
2020-05-14T07:14:00Z
Created
2021-08-18T09:35:34Z
Updated

Contact

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CDS support team
Postal Address
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