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Unveiling the AGN i...
Unveiling the AGN in IC 883: discovery of a parsec-scale radio jet
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- Romero-Cañizales, C. (författare)
- Instituto Milenio de Astrofísica,Millennium Institute of Astrophysics,Universidad Diego Portales,Diego Portales University,Pontificia Universidad Catolica de Chile
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- Alberdi, Antxon (författare)
- Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA)
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- Ricci, C. (författare)
- Pontificia Universidad Catolica de Chile
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- Arevalo, P. (författare)
- Universidad de Valparaíso,University of Valparaíso
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- Perez-Torres, Miguel Angel (författare)
- Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA),Universidad de Zaragoza,University of Zaragoza
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- Conway, John, 1963 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Beswick, R. J. (författare)
- University of Manchester
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- Bondi, M. (författare)
- Istituto nazionale di astrofisica (INAF)
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- Muxlow, T .W. B. (författare)
- University of Manchester
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- Argo, M. K. (författare)
- University of Manchester,University of Central Lancashire
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- Bauer, F. E. (författare)
- Instituto Milenio de Astrofísica,Millennium Institute of Astrophysics,Space Science Institute,Pontificia Universidad Catolica de Chile
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- Efstathiou, A. (författare)
- European University Cyprus
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- Herrero-Illana, R. (författare)
- European Southern Observatory Santiago,Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA)
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Mattila, S. (författare)
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- Ryder, S. D. (författare)
- Australian Astronomical Observatory
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(creator_code:org_t)
- 2017-01-27
- 2017
- Engelska.
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Ingår i: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 467:2, s. 2504-2516
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Abstract
Ämnesord
Stäng
- IC 883 is a luminous infrared galaxy (LIRG) classified as a starburst- active galactic nucleus (AGN) composite. In a previous study, we detected a low- luminosity AGN (LLAGN) radio candidate. Here, we report on our radio follow- up at three frequencies that provides direct and unequivocal evidence of the AGN activity in IC 883. Our analysis of archival X-ray data, together with the detection of a transient radio source with luminosity typical of bright supernovae, gives further evidence of the ongoing star formation activity, which dominates the energetics of the system. At sub- parsec scales, the radio nucleus has a core-jet morphology with the jet being a newly ejected component showing a subluminal proper motion of 0.6-1 c. The AGN contributes less than 2 per cent of the total IR luminosity of the system. The corresponding Eddington factor is similar to 10(-3), suggesting this is a low-accretion rate engine, as often found in LLAGNs. However, its high bolometric luminosity (similar to 10(44) erg s(-1)) agrees better with a normal AGN. This apparent discrepancy may just be an indication of the transition nature of the nucleus from a system dominated by star formation, to an AGN-dominated system. The nucleus has a strongly inverted spectrum and a turnover at similar to 4.4 GHz, thus qualifying as a candidate for the least luminous (L(5.0)GHz similar to 6.3 x 10(28) erg s(-1) Hz(-1)) and one of the youngest (similar to 3 x 10(3) yr) gigahertz-peaked spectrum (GPS) sources. If the GPS origin for the IC 883 nucleus is confirmed, then advanced mergers in the LIRG category are potentially key environments to unveil the evolution of GPS sources into more powerful radio galaxies.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- galaxies: individual: IC 883
- galaxies: nuclei
- galaxies: active
- radio continuum: galaxies
- galaxies: jets
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Romero-Cañizales ...
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Alberdi, Antxon
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Ricci, C.
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Arevalo, P.
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Perez-Torres, Mi ...
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Conway, John, 19 ...
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visa fler...
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Beswick, R. J.
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Bondi, M.
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Muxlow, T .W. B.
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Argo, M. K.
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Bauer, F. E.
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Efstathiou, A.
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Herrero-Illana, ...
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Mattila, S.
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Ryder, S. D.
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