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Sub-arcsecond imagi...
Sub-arcsecond imaging of Arp 299-A at 150 MHz with LOFAR: Evidence for a starburst-driven outflow
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- Ramirez-Olivencia, Naim (author)
- Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA)
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- Varenius, Eskil, 1986 (author)
- University of Manchester
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- Pérez-Torres, M.A. (author)
- Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA),Universidad de Zaragoza,University of Zaragoza
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- Alberdi, Antxon (author)
- Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA)
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- Pérez, E. (author)
- Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA)
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- Alonso-Herrero, A. (author)
- Centro de Astrobiologia (CAB)
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- Deller, A. (author)
- Swinburne University of Technology
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- Herrero-Illana, R. (author)
- European Southern Observatory Santiago
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- Moldon, J. (author)
- University of Manchester
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- Barcos-Munoz, Loreto (author)
- Atacama Large Millimeter-submillimeter Array (ALMA),National Radio Astronomy Observatory
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- Marti-Vidal, Ivan, 1980 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2018-03-08
- 2018
- English.
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In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 610
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Abstract
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- We report on the first sub-arcsecond (0.44 × 0.41 arcsec 2 ) angular resolution image at 150 MHz of the A-nucleus in the luminous infrared galaxy Arp 299, from International Low Frequency Array (LOFAR) Telescope observations. The most remarkable finding is that of an intriguing two-sided, filamentary structure emanating from the A-nucleus, which we interpret as an outflow that extends up to at least 14 arcsec from the A-nucleus in the N-S direction (≈5 kpc deprojected size) and accounts for almost 40% of the extended emission of the entire galaxy system. We also discuss HST/NICMOS [FeII] 1.64 μm and H 2 2.12 μm images of Arp 299-A, which show similar features to those unveiled by our 150 MHz LOFAR observations, providing strong morphological support for the outflow scenario. Finally, we discuss unpublished Na I D spectra that confirm the outflow nature of this structure. From energetic arguments, we rule out the low-luminosity active galactic nucleus in Arp 299-A as a driver for the outflow. On the contrary, the powerful, compact starburst in the central regions of Arp 299-A provides plenty of mechanical energy to sustain an outflow, and we conclude that the intense supernova (SN) activity in the nuclear region of Arp 299-A is driving the observed outflow. We estimate that the starburst wind can support a mass-outflow rate in the range (11-63 M ⊙ yr -1 ) at speeds of up to 370-890 km s -1 , and is relatively young, with an estimated kinematic age of 3-7 Myr. Those results open an avenue to the use of low-frequency (150 MHz), sub-arcsecond imaging with LOFAR to detect outflows in the central regions of local luminous infrared galaxies.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Medicinteknik -- Medicinsk bildbehandling (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Medical Engineering -- Medical Image Processing (hsv//eng)
Keyword
- ISM jets and outflows
- Galaxies
- Starburst
- Radio continuum galaxies
- Individual Arp 299
- Galaxies star formation galaxies
Publication and Content Type
- art (subject category)
- ref (subject category)
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Ramirez-Olivenci ...
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Varenius, Eskil, ...
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Pérez-Torres, M. ...
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Alberdi, Antxon
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Pérez, E.
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Alonso-Herrero, ...
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Deller, A.
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Herrero-Illana, ...
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Moldon, J.
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Barcos-Munoz, Lo ...
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Marti-Vidal, Iva ...
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NATURAL SCIENCES
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and Physical Science ...
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and Atom and Molecul ...
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Chalmers University of Technology