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Water, methanol and...
Water, methanol and dense gas tracers in the local ULIRG Arp 220: results from the new SEPIA Band 5 Science Verification campaign
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- Galametz, M. (author)
- European Southern Observatory (ESO)
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- Zhang, Z. Y. (author)
- University of Edinburgh,European Southern Observatory (ESO)
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- Immer, K. (author)
- European Southern Observatory (ESO)
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- Humphreys, E. (author)
- European Southern Observatory (ESO)
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- Aladro, Rebeca, 1979 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- De Breuck, C. (author)
- European Southern Observatory (ESO)
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- Ginsburg, A. (author)
- European Southern Observatory (ESO)
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- Madden, S. C. (author)
- Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA),The French Alternative Energies and Atomic Energy Commission (CEA)
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- Moller, P. (author)
- European Southern Observatory (ESO)
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- Arumugam, V. (author)
- European Southern Observatory (ESO)
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(creator_code:org_t)
- 2016-06-24
- 2016
- English.
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In: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966 .- 1745-3925 .- 1745-3933. ; 462:1, s. L36-L40
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Abstract
Subject headings
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- We present a line survey of the ultraluminous infrared galaxy Arp 220, taken with the newly installed SEPIA (Swedish-European Southern Observatory PI receiver for APEX) Band 5 instrument on APEX (Atacama Pathfinder Experiment). We illustrate the capacity of SEPIA to detect the 183.3 GHz H(2)O3(1,3)-2(2,0) line against the atmospheric H2O absorption feature. We confirm the previous detection of the HCN(2-1) line, and detect new transitions of standard dense gas tracers such as HNC(2-1), HCO+(2-1), CS(4-3), (CS)-S-34(4-3) and HC3N(20-19). We also detect HCN(2-1) v(2) = 1 and the 193.5 GHz methanol (4-3) group for the first time. The absence of time variations in the megamaser water line compared to previous observations seems to rule out an AGN nuclear origin for the line. It could, on the contrary, favour a thermal origin instead, but also possibly be a sign that the megamaser emission is associated with star-forming cores washed out in the beam. We finally discuss how the new transitions of HCN, HNC and HCO+ refine our knowledge of the interstellar medium physical conditions in Arp 220.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- galaxies: ISM-galaxies: starburst
- ISM: molecules
- galaxies: individual: Arp 220
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Galametz, M.
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Zhang, Z. Y.
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Immer, K.
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Humphreys, E.
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Aladro, Rebeca, ...
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De Breuck, C.
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show more...
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Ginsburg, A.
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Madden, S. C.
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Moller, P.
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Arumugam, V.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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Monthly Notices ...
- By the university
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Chalmers University of Technology