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Discovery of an unusual radio galaxy with a hybrid double-double and X-shaped morphology

Published online by Cambridge University Press:  21 February 2013

C. C. Wang ,
H. Yan. Zhou ,
T. Ji ,
W. J. Liu  and
N. Jiang
C. C. Wang*
Affiliation:
Key Laboratory for Research in Galaxies and Cosmology, University of Science and Technology of China, Chinese Academy of Sciences, Hefei, Anhui 230026, China Department of Astronomy, University of Science and Technology of China, Hefei, Anhui 230026, China
H. Yan. Zhou
Affiliation:
Key Laboratory for Research in Galaxies and Cosmology, University of Science and Technology of China, Chinese Academy of Sciences, Hefei, Anhui 230026, China Department of Astronomy, University of Science and Technology of China, Hefei, Anhui 230026, China Polar Research Institute of China, Jinqiao Rd. 451, Shanghai 200136, China
T. Ji
Affiliation:
Key Laboratory for Research in Galaxies and Cosmology, University of Science and Technology of China, Chinese Academy of Sciences, Hefei, Anhui 230026, China Department of Astronomy, University of Science and Technology of China, Hefei, Anhui 230026, China Polar Research Institute of China, Jinqiao Rd. 451, Shanghai 200136, China
W. J. Liu
Affiliation:
Key Laboratory for Research in Galaxies and Cosmology, University of Science and Technology of China, Chinese Academy of Sciences, Hefei, Anhui 230026, China Department of Astronomy, University of Science and Technology of China, Hefei, Anhui 230026, China
N. Jiang
Affiliation:
Key Laboratory for Research in Galaxies and Cosmology, University of Science and Technology of China, Chinese Academy of Sciences, Hefei, Anhui 230026, China Department of Astronomy, University of Science and Technology of China, Hefei, Anhui 230026, China
*
†Correspondence author: ccwang@ustc.edu.cn
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Abstract

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We report the discovery of the first ‘X’-shaped double-double radio galaxy (DDRG), MRC0929+164 (J0932+1611), from FIRST radio survey. The intersection angle of the lines of two pairs of radio lobes is around 20.6° for this object, much larger than other DDRGs. This unusual morphology may be a hint that the growth of its central super-massive black hole suffered a violent galaxy merger once.

Keywords

Galaxies:jetsradio continuum:galaxiesblack hole physics
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S290: Feeding Compact Objects: Accretion on All Scales , August 2012 , pp. 323 - 324
Copyright
Copyright © International Astronomical Union 2013

References

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