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COLA. III. RADIO DE...
COLA. III. RADIO DETECTION OF ACTIVE GALACTIC NUCLEUS IN COMPACT MODERATE LUMINOSITY INFRARED GALAXIES
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- Parra Barraza, Rodrigo, 1974 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Conway, John, 1963 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Aalto, Susanne, 1964 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Appleton, P. (författare)
- California Institute of Technology (Caltech)
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- Norris, R. P. (författare)
- Commonwealth Scientific and Industrial Research Organisation (CSIRO)
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- Pihlstrom, Y. (författare)
- National Radio Astronomy Observatory,University of New Mexico
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- Kewley, L. J. (författare)
- University of Hawaii
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(creator_code:org_t)
- 2010
- 2010
- Engelska.
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Ingår i: Astrophysical Journal. - 1538-4357 .- 0004-637X. ; 720:1, s. 555-568
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http://publications.... (primary) (free)
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https://doi.org/10.1...
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https://research.cha...
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Abstract
Ämnesord
Stäng
- We present results from 4.8 GHz Very Large Array (VLA) and global very long baseline interferometry (VLBI) observations of the northern half of the moderate FIR luminosity (median L-IR = 10(11.01) L-circle dot) COLA sample of star-forming galaxies. VLBI sources are detected in a high fraction (20/90) of the galaxies observed. The radio luminosities of these cores (similar to 10(21) W Hz(-1)) are too large to be explained by radio supernovae or supernova remnants and we argue that they are instead powered by active galactic nuclei (AGNs). These sub-parsec scale radio cores are preferentially detected toward galaxies whose VLA maps show bright 100-500 parsec scale nuclear radio components. Since these latter structures tightly follow the FIR to radio-continuum correlation for star formation, we conclude that the AGN-powered VLBI sources are associated with compact nuclear starburst environments. The implications for possible starburst-AGN connections are discussed. The detected VLBI sources have a relatively narrow range of radio luminosity consistent with models in which intense compact Eddington-limited starbursts regulate the gas supply onto a central supermassive black hole. The high incidence of AGN radio cores in compact starbursts suggests little or no delay between the starburst phase and the onset of AGN activity.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- starburst-agn connection
- classification
- sample
- supernova-remnants
- galaxies: active
- black-hole
- radio
- spectra
- galaxies: starburst
- infrared: galaxies
- emission
- host
- galaxies
- continuum: galaxies
- arp-220
- line
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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