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Sökning: id:"swepub:oai:research.chalmers.se:37aa3d8e-4ae6-4593-b194-65625bf1e29f" > Evidence for a chem...

  • Lindberg, Johan,1984Chalmers tekniska högskola,Chalmers University of Technology,NASA Goddard Space Flight Center (författare)

Evidence for a chemically differentiated outflow in Mrk 231

  • Artikel/kapitelEngelska2016

Förlag, utgivningsår, omfång ...

  • 2016-02-12
  • EDP Sciences,2016
  • electronicrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:research.chalmers.se:37aa3d8e-4ae6-4593-b194-65625bf1e29f
  • https://research.chalmers.se/publication/235944URI
  • https://doi.org/10.1051/0004-6361/201527457DOI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

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

Anmärkningar

  • Aims. Our goal is to study the chemical composition of the outflows of active galactic nuclei and starburst galaxies. Methods. We obtained high-resolution interferometric observations of HCN and HCO+ J = 1 -> 0 and J = 2 -> 1 of the ultraluminous infrared galaxy Mrk 231 with the IRAM Plateau de Bure Interferometer. We also use previously published observations of HCN and HCO+ J = 1 -> 0 and J = 3 -> 2, and HNC J = 1 -> 0 in the same source. Results. In the line wings of the HCN, HCO+, and HNC emission, we find that these three molecular species exhibit features at distinct velocities which differ between the species. The features are not consistent with emission lines of other molecular species. Through radiative transfer modelling of the HCN and HCO+ outflow emission we find an average abundance ratio X(HCN) = X(HCO+) greater than or similar to 1000. Assuming a clumpy outflow, modelling of the HCN and HCO+ emission produces strongly inconsistent outflow masses. Conclusions. Both the anti-correlated outflow features of HCN and HCO+ and the different outflow masses calculated from the radiative transfer models of the HCN and HCO+ emission suggest that the outflow is chemically differentiated. The separation between HCN and HCO+ could be an indicator of shock fronts present in the outflow, since the HCN/HCO+ ratio is expected to be elevated in shocked regions. Our result shows that studies of the chemistry in large-scale galactic outflows can be used to better understand the physical properties of these outflows and their effects on the interstellar medium in the galaxy.

Ämnesord och genrebeteckningar

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

  • Aalto, Susanne,1964Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)saalto (författare)
  • Muller, Sebastien,1976Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)mullers (författare)
  • Marti-Vidal, Ivan,1980Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)mivan (författare)
  • Falstad, Niklas,1987Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)falstad (författare)
  • Costagliola, Francesco,1981Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)costagli (författare)
  • Henkel, C.King Abdulaziz University,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (författare)
  • van der Werf, P.Universiteit Leiden (UL),Leiden University (UL) (författare)
  • Burillo, S. G.Observatorio Astronómico Nacional (OAN),Spanish National Observatory (OAN) (författare)
  • Gonzalez-Alfonso, E.Universidad de Alcala,University of Alcalá (författare)
  • Chalmers tekniska högskolaNASA Goddard Space Flight Center (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Astronomy and Astrophysics: EDP Sciences5870004-63611432-0746

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