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Molecules as tracers of galaxy evolution: an EMIR survey I. Presentation of the data and first results

Costagliola, Francesco, 1981 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Aalto, Susanne, 1964 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Rodriguez, M. I. (author)
Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA)
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Muller, Sebastien, 1976 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Spoon, H. W. W. (author)
Cornell University
Martin, S. (author)
European Southern Observatory Santiago
Perez-Torres, Miguel Angel (author)
Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA)
Alberdi, Antxon (author)
Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA)
Lindberg, Johan (author)
Chalmers tekniska högskola,Chalmers University of Technology,Köpenhamns universitet,University of Copenhagen
Batejat, Fabien, 1979 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Jutte, E. (author)
Ruhr-Universität Bochum
van der Werf, P. (author)
Universiteit Leiden (UL),Leiden University (UL),University of Edinburgh
Lahuis, F. (author)
Universiteit Leiden (UL),Leiden University (UL),Netherlands Institute for Space Research (SRON)
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 (creator_code:org_t)
2011-02-22
2011
English.
In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 528
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Aims. We investigate the molecular gas properties of a sample of 23 galaxies in order to find and test chemical signatures of galaxy evolution and to compare them to IR evolutionary tracers. Methods. Observation at 3 mm wavelengths were obtained with the EMIR broadband receiver, mounted on the IRAM 30 m telescope on Pico Veleta, Spain. We compare the emission of the main molecular species with existing models of chemical evolution by means of line intensity ratios diagrams and principal component analysis. Results. We detect molecular emission in 19 galaxies in two 8 GHz-wide bands centred at 88 and 112 GHz. The main detected molecules are CO, (CO)-C-13, HCN, HNC, HCO+, CN, and C2H. We also detect HC3N J = 10-9 in the galaxies IRAS 17208, IC 860, NGC 4418, NGC 7771, and NGC 1068. The only HC3N detections are in objects with HCO+/HCN 0.8). The brightest HC3N emission is found in IC 860, where we also detect the molecule in its vibrationally excited state. We find low HNC/HCN line ratios (

Subject headings

NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)

Keyword

nearby galaxies
galaxies: evolution
galaxies: active
ISM: molecules
seyfert-galaxies
star-formation
interstellar-medium
dense gas
luminous infrared galaxies
arp 220
vibrationally excited hc3n
hnc line emission
massive
abundances
evolution
galaxies: ISM

Publication and Content Type

art (subject category)
ref (subject category)

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