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A CO-rich merger sh...
A CO-rich merger shaping a powerful and hyperluminous infrared radio galaxy at z=2: the Dragonfly Galaxy
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- Emonts, B. (author)
- Centro de Astrobiologia (CAB)
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- Mao, M. Y. (author)
- National Radio Astronomy Observatory
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- Stroe, A. (author)
- Universiteit Leiden (UL),Leiden University (UL)
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- Pentericci, L. (author)
- Osservatorio Astronomico di Roma
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- Villar-Martin, M. (author)
- Centro de Astrobiologia (CAB),Universidad Autonoma de Madrid (UAM)
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- Norris, R. P. (author)
- Commonwealth Scientific and Industrial Research Organisation (CSIRO)
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- Miley, G. (author)
- Universiteit Leiden (UL),Leiden University (UL)
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- De Breuck, C. (author)
- European Southern Observatory (ESO)
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- van Moorsel, G. A. (author)
- National Radio Astronomy Observatory
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Lehnert, M. (author)
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- Carilli, C. L. (author)
- University Of Cambridge,National Radio Astronomy Observatory
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- Rottgering, H. (author)
- Universiteit Leiden (UL),Leiden University (UL)
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- Seymour, N. (author)
- University of Western Australia
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- Sadler, E. M. (author)
- The University of Sydney
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- Ekers, R. D. (author)
- Commonwealth Scientific and Industrial Research Organisation (CSIRO)
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- Drouart, Guillaume, 1987 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Feain, I. (author)
- The University of Sydney
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- Colina, L. (author)
- Universidad Autonoma de Madrid (UAM),Centro de Astrobiologia (CAB)
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- Stevens, J. (author)
- Commonwealth Scientific and Industrial Research Organisation (CSIRO)
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- Holt, J. (author)
- European Space Research and Technology Centre (ESA ESTEC)
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(creator_code:org_t)
- 2015-06-03
- 2015
- English.
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In: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 451:1, s. 1025-1035
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Abstract
Subject headings
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- In the low-redshift Universe, the most powerful radio sources are often associated with gasrich galaxy mergers or interactions. We here present evidence for an advanced, gas-rich ('wet') merger associated with a powerful radio galaxy at a redshift of z similar to 2. This radio galaxy, MRC 0152-209, is the most infrared-luminous high-redshift radio galaxy known in the Southern hemisphere. Using the Australia Telescope Compact Array, we obtained highresolution CO(1-0) data of cold molecular gas, which we complement with Hubble Space Telescope (HS7)IWide Field Planetaiy Camera 2 (WFPC2) imaging and William Herschel Telescope long-slit spectroscopy. We find that, while roughly M-H2 x 10(10) Me of molecular gas coincides with the central host galaxy, another M-H2 similar to 3 x 10(10) Me is spread across a total extent of'-60 kpc. Most of this widespread CO(1-0) appears to follow prominent tidal features visible in the rest-frame near-UV HSTIWFPC2 imaging. Lya emission shows an excess over He II, but a deficiency over LIR, which is likely the result of photoionization by enhanced but very obscured star formation that was triggered by the merger. In terms of feedback, the radio source is aligned with widespread CO(1-0) emission, which suggests that there is a physical link between the propagating radio jets and the presence of cold molecular gas on scales of the galaxy's halo. Its optical appearance, combined with the transformational stage at which we witness the evolution of MRC 0152-209, leads us to adopt the name 'Dragonfly Galaxy'.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- MASSIVE DISK
- BAND BACK-END
- GALAXIES
- HIGH-REDSHIFT GALAXIES
- galaxies: individual: MRC 0152-209
- galaxies: active
- FORMATION HISTORY
- ACTIVE GALACTIC NUCLEI
- ISM: jets and outflows
- galaxies: high-redshift
- SCALING RELATIONS
- MOLECULAR GAS-RESERVOIRS
- STAR-FORMING GALAXIES
- GALAXIES
- QUASAR HOST GALAXIES
- LUMINOUS SUBMILLIMETER
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Emonts, B.
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Mao, M. Y.
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Stroe, A.
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Pentericci, L.
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Villar-Martin, M ...
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Norris, R. P.
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show more...
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Miley, G.
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De Breuck, C.
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van Moorsel, G. ...
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Lehnert, M.
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Carilli, C. L.
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Rottgering, H.
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Seymour, N.
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Sadler, E. M.
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Ekers, R. D.
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Drouart, Guillau ...
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Feain, I.
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Colina, L.
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Stevens, J.
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Holt, J.
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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Monthly Notices ...
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Chalmers University of Technology