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CON-quest: II. Spat...
CON-quest: II. Spatially and spectrally resolved HCN/HCO + line ratios in local luminous and ultraluminous infrared galaxies
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- Nishimura, Y. (författare)
- University of Tokyo, Japan,National Astronomical Observatory of Japan
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- Aalto, Susanne, 1964 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Gorski, Mark, 1989 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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visa fler...
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- König, Sabine, 1983 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Onishi, Kyoko, 1989 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Wethers, Clare, 1991 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Yang, Chentao, 1988 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Barcos-Munoz, Loreto (författare)
- National Radio Astronomy Observatory
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- Combes, F. (författare)
- Observatoire de Paris,Paris Observatory
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- Diaz-Santos, T. (författare)
- European University Cyprus
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- Gallagher III, J. S. (författare)
- University of Wisconsin Madison,Macalester College
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- Burillo, S. G. (författare)
- Observatorio Astronómico Nacional (OAN),Spanish National Observatory (OAN)
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- Gonzalez-Alfonso, E. (författare)
- Universidad de Alcala,University of Alcalá
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- Greve, T. R. (författare)
- Danmarks Tekniske Universitet,Technical University of Denmark,Niels Bohr Institute
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- Harada, N. (författare)
- The Graduate University for Advanced Studies (SOKENDAI),National Astronomical Observatory of Japan
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- Henkel, C. (författare)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),King Abdulaziz University
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- Imanishi, M. (författare)
- National Astronomical Observatory of Japan
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- Kohno, K. (författare)
- University of Tokyo, Japan
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- Linden, S. T. (författare)
- University of Arizona
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- Mangum, J. G. (författare)
- National Radio Astronomy Observatory
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- Martin, S. (författare)
- European Southern Observatory Santiago,Atacama Large Millimeter-submillimeter Array (ALMA)
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- Muller, Sebastien, 1976 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Privon, G. (författare)
- University of Virginia,National Radio Astronomy Observatory
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- Ricci, C. (författare)
- Beijing University of Technology,Universidad Diego Portales,Diego Portales University
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- Stanley, F. (författare)
- Institut de Radioastronomie Millimétrique (IRAM)
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- van der Werf, P. (författare)
- Universiteit Leiden (UL),Leiden University (UL)
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- Viti, Serena (författare)
- Universiteit Leiden (UL),Leiden University (UL),University College London (UCL)
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(creator_code:org_t)
- 2024
- 2024
- Engelska.
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Ingår i: Astronomy and Astrophysics. - 0004-6361 .- 1432-0746. ; 686
- Relaterad länk:
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https://research.cha... (primary) (free)
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https://research.cha...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Context. Nuclear regions of ultraluminous and luminous infrared galaxies (U/LIRGs) are powered by starbursts and/or active galactic nuclei (AGNs). These regions are often obscured by extremely high columns of gas and dust. Molecular lines in the submillimeter windows have the potential to determine the physical conditions of these compact obscured nuclei (CONs). Aims. We aim to reveal the distributions of HCN and HCO+ emission in local U/LIRGs and investigate whether and how they are related to galaxy properties. Methods. Using the Atacama Large Millimeter/submillimeter Array (ALMA), we have conducted sensitive observations of the HCN J = 3-2 and HCO+J = 3-2 lines toward 23 U/LIRGs in the local Universe (z < 0.07) with a spatial resolution of ~0.3″ ( ~50-400 pc). Results. We detected both HCN and HCO+ in 21 galaxies, only HCN in one galaxy, and neither in one galaxy. The global HCN/HCO+ line ratios, averaged over scales of ~0.5-4 kpc, range from 0.4 to 2.3, with an unweighted mean of 1.1. These line ratios appear to have no systematic trend with bolometric AGN luminosity or star formation rate. The line ratio varies with position and velocity within each galaxy, with an average interquartile range of 0.38 on a spaxel-by-spaxel basis. In eight out of ten galaxies known to have outflows and/or inflows, we found spatially and kinematically symmetric structures of high line ratios. These structures appear as a collimated bicone in two galaxies and as a thin spherical shell in six galaxies. Conclusions. Non-LTE analysis suggests that the high HCN/HCO+ line ratio in outflows is predominantly influenced by the abundance ratio. Chemical model calculations indicate that the enhancement of HCN abundance in outflows is likely due to high-temperature chemistry triggered by shock heating. These results imply that the HCN/HCO+ line ratio can aid in identifying the outflow geometry when the shock velocity of the outflows is sufficiently high to heat the gas.
Ämnesord
- 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)
Nyckelord
- ISM: molecules
- Galaxies: ISM
- Galaxies: nuclei
- ISM: jets and outflows
- Galaxies: evolution
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Nishimura, Y.
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Aalto, Susanne, ...
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Gorski, Mark, 19 ...
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König, Sabine, 1 ...
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Onishi, Kyoko, 1 ...
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Wethers, Clare, ...
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visa fler...
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Yang, Chentao, 1 ...
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Barcos-Munoz, Lo ...
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Combes, F.
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Diaz-Santos, T.
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Gallagher III, J ...
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Burillo, S. G.
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Gonzalez-Alfonso ...
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Greve, T. R.
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Harada, N.
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Henkel, C.
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Imanishi, M.
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Kohno, K.
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Linden, S. T.
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Mangum, J. G.
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Martin, S.
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Muller, Sebastie ...
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Privon, G.
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Ricci, C.
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Stanley, F.
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van der Werf, P.
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Viti, Serena
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Chalmers tekniska högskola