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Molecular gas in th...
Molecular gas in the northern nucleus of Mrk 273: Physical and chemical properties of the disc and its outflow
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- Aladro, Rebeca, 1979 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- König, Sabine, 1983 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Aalto, Susanne, 1964 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Gonzalez-Alfonso, E. (författare)
- Universidad de Alcala,University of Alcalá
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- Falstad, Niklas, 1987 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Martin, S. (författare)
- Atacama Large Millimeter-submillimeter Array (ALMA),European Southern Observatory Santiago
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- Muller, Sebastien, 1976 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Garcia-Burillo, S. (författare)
- Observatorio Astronómico Nacional (OAN),Spanish National Observatory (OAN)
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- Henkel, C. (författare)
- King Abdulaziz University,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- van der Werf, P. (författare)
- Universiteit Leiden (UL),Leiden University (UL)
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- Mills, E. (författare)
- San Jose State University
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- Fischer, J. (författare)
- George Mason University
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- Costagliola, Francesco, 1981 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Krips, M. (författare)
- Old Dominion University
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Chalmers tekniska högskola Max Planck Gesellschaft zur Förderung der Wissenschaften eV. (MPG) (creator_code:org_t)
- 2018-09-20
- 2018
- Engelska.
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Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 617
- Relaterad länk:
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https://research.cha... (primary) (free)
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https://www.aanda.or...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Aiming to characterise the properties of the molecular gas in the ultra-luminous infrared galaxy Mrk 273 and its outflow, we used the NOEMA interferometer to image the dense-gas molecular tracers HCN, HCO+, HNC, HOC+ and HC3N at similar to 86 GHz and similar to 256 GHz with angular resolutions of 4.'' 9 x 4.'' 5 (similar to 3.7 x 3.4 kpc) and 0.'' 61 x 0.'' 55 (similar to 460 x 420 pc). We also modelled the flux of several H2O lines observed with Herschel using a radiative transfer code that includes excitation by collisions and far-infrared photons. The disc of the Mrk 273 north nucleus has two components with decoupled kinematics. The gas in the outer parts (R similar to 1.5 kpc) rotates with a south-east to north-west direction, while in the inner disc (R similar to 300 pc) follows a north-east to south-west rotation. The central 300 pc, which hosts a compact starburst region, is filled with dense and warm gas, and contains a dynamical mass of (4-5) x 10(9) M-circle dot, a luminosity of L'HCN = (3-4) x 10(8) K km s(-1) pc(2), and a dust temperature of 55 K. At the very centre, a compact core with R similar to 50 pc has a luminosity of LIR = 4 x 10(11) L-circle dot (30% of the total infrared luminosity), and a dust temperature of 95 K. The core is expanding at low velocities similar to 50-100 km s(-1), probably affected by the outflowing gas. We detect the blue-shifted component of the outflow, while the red-shifted counterpart remains undetected in our data. Its cold and dense phase reaches fast velocities up to similar to 1000 km s(-1), while the warm outflowing gas has more moderate maximum velocities of similar to 600 km s(-1). The outflow is compact, being detected as far as 460 pc from the centre in the northern direction, and has a mass of dense gas <= 8 x 10(8) M-circle dot. The difference between the position angles of the inner disc (similar to 70 degrees) and the outflow (similar to 10 degrees) indicates that the outflow is likely powered by the AGN, and not by the starburst. Regarding the chemistry in Mrk 273, we measure an extremely low HCO+/HOC+ ratio of 10 +/- 5 in the inner disc of Mrk 273.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
- 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
- galaxies: kinematics and dynamics
- galaxies: individual: Mrk 273
- galaxies: nuclei
- line: profiles
- ISM: molecules
- astrochemistry
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Aladro, Rebeca, ...
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König, Sabine, 1 ...
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Aalto, Susanne, ...
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Gonzalez-Alfonso ...
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Falstad, Niklas, ...
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Martin, S.
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Muller, Sebastie ...
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Garcia-Burillo, ...
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Henkel, C.
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van der Werf, P.
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Mills, E.
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Fischer, J.
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Costagliola, Fra ...
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Krips, M.
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