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NGC 5252: a pair of...
NGC 5252: a pair of radio-emitting active galactic nuclei?
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- Yang, Xiaolong (författare)
- Chinese Academy of Sciences
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- Yang, Jun, 1979 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Paragi, Z. (författare)
- Joint Institute for VLBI in Europe (JIVE)
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- Liu, Xiang (författare)
- Chinese Academy of Sciences
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- An, T. (författare)
- Shanghai Astronomical Observatory. Chinese Academy of Sciences,Shanghai Astronomical Observatory Chinese Academy of Sciences,Chinese Academy of Sciences
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- Bianchi, Stefano (författare)
- Universita degli studi - Roma Tre
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- Ho, Luis C. (författare)
- Beijing University of Technology
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- Cui, Lang (författare)
- Chinese Academy of Sciences
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- Zhao, Wei (författare)
- Chinese Academy of Sciences,Shanghai Astronomical Observatory. Chinese Academy of Sciences,Shanghai Astronomical Observatory Chinese Academy of Sciences
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- Wu, Xiaocong (författare)
- Chinese Academy of Sciences,Shanghai Astronomical Observatory. Chinese Academy of Sciences,Shanghai Astronomical Observatory Chinese Academy of Sciences
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(creator_code:org_t)
- 2016-08-12
- 2017
- Engelska.
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Ingår i: Monthly Notices of the Royal Astronomical Society: Letters. - : Oxford University Press (OUP). - 1745-3925 .- 1745-3933. ; 464:1, s. L70-L74
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Abstract
Ämnesord
Stäng
- The X-ray source CXO J133815.6+043255 has counterparts in the UV, optical, and radio bands. Based on the multiband investigations, it has been recently proposed by Kim et al. as a rarely seen off-nucleus ultraluminous X-ray (ULX) source with a black hole mass of ≥104 M⊙ in the nearby Seyfert galaxy NGC 5252. To explore its radio properties at very high angular resolution, we performed very long-baseline interferometry (VLBI) observations with the European VLBI Network (EVN) at 1.7 GHz. We find that the radio counterpart is remarkably compact among the known ULXs. It does not show a resolved structure with a resolution of a few milliarcsecond (mas), and the total recovered flux density is comparable to that measured in earlier sub-arcsecond-resolution images. The compact radio structure, the relatively flat spectrum, and the high radio luminosity are consistent with a weakly accreting supermassive black hole in a low-luminosity active galactic nucleus. The nucleus of NGC 5252 itself has similar radio properties. We argue that the system represents a relatively rare pair of active galactic nuclei, where both components emit in the radio.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- galaxies: individual: NGC 5252 galaxies: jets radio continuum: galaxies X-rays: individual: CXO J133815.6+043255
- galaxies
- NGC 5252
- individual
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- ref (ämneskategori)
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Yang, Xiaolong
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Yang, Jun, 1979
-
Paragi, Z.
-
Liu, Xiang
-
An, T.
-
Bianchi, Stefano
-
visa fler...
-
Ho, Luis C.
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Cui, Lang
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Zhao, Wei
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Wu, Xiaocong
-
visa färre...
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Chalmers tekniska högskola