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  • Falstad, Niklas,1987Chalmers tekniska högskola,Chalmers University of Technology (författare)

Hidden or missing outflows in highly obscured galaxy nuclei?

  • Artikel/kapitelEngelska2019

Förlag, utgivningsår, omfång ...

  • 2019-02-27
  • EDP Sciences,2019
  • electronicrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:research.chalmers.se:6a7fdbf1-7186-48f3-a4a6-7b7ab108f57d
  • https://research.chalmers.se/publication/509336URI
  • https://research.chalmers.se/publication/509177URI
  • https://doi.org/10.1051/0004-6361/201834586DOI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

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

Anmärkningar

  • Understanding the nuclear growth and feedback processes in galaxies requires investigating their often obscured central regions. One way to do this is to use (sub)millimeter line emission from vibrationally excited HCN (HCN-vib), which is thought to trace warm and highly enshrouded galaxy nuclei. It has been suggested that the most intense HCN-vib emission from a galaxy is connected to a phase of nuclear growth that occurs before the nuclear feedback processes have been fully developed. Aims. We aim to investigate if there is a connection between the presence of strong HCN-vib emission and the development of feedback in (ultra)luminous infrared galaxies ((U)LIRGs). Methods. We collected literature and archival data to compare the luminosities of rotational lines of HCN-vib, normalized to the total infrared luminosity, to the median velocities of 119 μm OH absorption lines, potentially indicating outflows, in a total of 17 (U)LIRGs. Results. The most HCN-vib luminous systems all lack signatures of significant molecular outflows in the far-infrared OH absorption lines. However, at least some of the systems with bright HCN-vib emission have fast and collimated outflows that can be seen in spectral lines at longer wavelengths, including in millimeter emission lines of CO and HCN (in its vibrational ground state) and in radio absorption lines of OH. Conclusions. We conclude that the galaxy nuclei with the highest L HCN-vib /L IR do not drive wide-angle outflows that are detectable using the median velocities of far-infrared OH absorption lines. This is possibly because of an orientation effect in which sources oriented in such a way that their outflows are not along our line of sight also radiate a smaller proportion of their infrared luminosity in our direction. It could also be that massive wide-angle outflows destroy the deeply embedded regions responsible for bright HCN-vib emission, so that the two phenomena cannot coexist. This would strengthen the idea that vibrationally excited HCN traces a heavily obscured stage of evolution before nuclear feedback mechanisms are fully developed.

Ämnesord och genrebeteckningar

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

  • Hallqvist, F.Chalmers tekniska högskola,Chalmers University of Technology (författare)
  • Aalto, Susanne,1964Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)saalto (författare)
  • König, Sabine,1983Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)ksabine (författare)
  • Muller, Sebastien,1976Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)mullers (författare)
  • Aladro, Rebeca,1979Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)(Swepub:cth)aladro (författare)
  • Combes, F.LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France (författare)
  • Evans, A. S.University of Virginia,National Radio Astronomy Observatory (författare)
  • Fuller, G. A.University of Manchester (författare)
  • Gallagher III, J. S.University of Wisconsin Madison (författare)
  • Burillo, S. G.Observatorio Astronómico Nacional (OAN),Spanish National Observatory (OAN) (författare)
  • Gonzalez-Alfonso, E.Universidad de Alcala,University of Alcalá (författare)
  • Greve, T. R.Danmarks Tekniske Universitet,Technical University of Denmark,University College London (UCL) (författare)
  • Henkel, C.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),King Abdulaziz University (författare)
  • Imanishi, M.National Astronomical Observatory of Japan (författare)
  • Izumi, T.National Astronomical Observatory of Japan (författare)
  • Mangum, J. G.National Radio Astronomy Observatory (författare)
  • Martin, S.European Southern Observatory Santiago,Atacama Large Millimeter-submillimeter Array (ALMA) (författare)
  • Privon, G.University of Florida (författare)
  • Sakamoto, K.Academia Sinica Taiwan (författare)
  • Veilleux, S.University of Maryland (författare)
  • van der Werf, P.Universiteit Leiden (UL),Leiden University (UL) (författare)
  • Chalmers tekniska högskolaMax Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG) (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Astronomy and Astrophysics: EDP Sciences6230004-63611432-0746

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