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Sökning: WFRF:(Ramírez Ivan) > (2015-2019) > Sub-arcsecond imagi...

  • Ramirez-Olivencia, NaimInstituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA) (författare)

Sub-arcsecond imaging of Arp 299-A at 150 MHz with LOFAR: Evidence for a starburst-driven outflow

  • Artikel/kapitelEngelska2018

Förlag, utgivningsår, omfång ...

  • 2018-03-08
  • EDP Sciences,2018
  • electronicrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:research.chalmers.se:7c26b594-bcb0-4bce-b8fb-98bee54d0cd5
  • https://research.chalmers.se/publication/501430URI
  • https://doi.org/10.1051/0004-6361/201732543DOI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:art swepub-publicationtype
  • Ämneskategori:ref swepub-contenttype

Anmärkningar

  • 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 Finally, we discuss unpublished Na I D spectra that confirm the outflow nature of this structure.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.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Varenius, Eskil,1986University of Manchester(Swepub:cth)varenius (författare)
  • Pérez-Torres, M.A.Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA),Universidad de Zaragoza,University of Zaragoza (författare)
  • Alberdi, AntxonInstituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA) (författare)
  • Pérez, E.Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA) (författare)
  • Alonso-Herrero, A.Centro de Astrobiologia (CAB) (författare)
  • Deller, A.Swinburne University of Technology (författare)
  • Herrero-Illana, R.European Southern Observatory Santiago (författare)
  • Moldon, J.University of Manchester (författare)
  • Barcos-Munoz, LoretoAtacama Large Millimeter-submillimeter Array (ALMA),National Radio Astronomy Observatory (författare)
  • Marti-Vidal, Ivan,1980Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)mivan (författare)
  • Instituto de Astrofisica de Andalucía (IAA)University of Manchester (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Astronomy and Astrophysics: EDP Sciences6100004-63611432-0746

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