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VALES VI: ISM enric...
VALES VI: ISM enrichment in star-forming galaxies up to z similar to 0.2 using (CO)-C-12(1-0), (CO)-C-13(1-0), and (CO)-O-18(1-0) line luminosity ratios
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- Mendez-Hernandez, H. (author)
- Universidad de Valparaíso,University of Valparaíso
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- Ibar, E. (author)
- Universidad de Valparaíso,University of Valparaíso
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- Knudsen, Kirsten Kraiberg, 1976 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Cassata, P. (author)
- Istituto nazionale di astrofisica (INAF),Università Degli Studi di Padova,University of Padua
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- Aravena, M. (author)
- Universidad Diego Portales,Diego Portales University
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- Michalowski, M. J. (author)
- Uniwersytet im. Adama Mickiewicza w Poznaniu,Adam Mickiewicz University in Poznań
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- Zhang, Zhi-Yu (author)
- Nanjing University
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- Lara-Lopez, M. A. (author)
- Köpenhamns universitet,University of Copenhagen
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- Ivison, R. J. (author)
- European Southern Observatory Santiago
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- van der Werf, P. (author)
- Universiteit Leiden (UL),Leiden University (UL)
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- Villanueva, V. (author)
- University of Maryland
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- Herrera-Camus, R. (author)
- Universidad de Concepción,University of Concepcion
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- Hughes, T. M. (author)
- University of Science and Technology of China,Chinese Academy of Sciences,Universidad de Valparaíso,University of Valparaíso
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(creator_code:org_t)
- 2020-07-07
- 2020
- English.
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In: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 497:3, s. 2771-2785
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Abstract
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- We present Atacama Large Millimeter/sub-millimeter Array (ALMA) observations towards 27 low-redshift (0.02< z< 0.2) starforming galaxies taken from the Valpara ' iso ALMA/APEX Line Emission Survey. We perform stacking analyses of the (CO)-C-12(1-0), (CO)-C-13(1-0), and (CO)-O-18(1-0) emission lines to explore the L' [(CO)-C-12(1-0)]/L' [(CO)-C-13(1-0)] [hereafter L' ((CO)-C-12)/L' ((CO)-C-13)] and L' [(CO)-C-13(1-0)]/L' [(CO)-O-18(1-0)] [hereafter L' ((CO)-C-13)/L' ((CO)-O-18)] line luminosity ratio dependence as a function of different global galaxy parameters related to the star formation activity. The sample has far-IR luminosities of 1010.1-11.9 L and stellar masses of 109.8-10.9M(circle dot) corresponding to typical star-forming and starburst galaxies at these redshifts. On average, we find an L' (12CO)/L' ((CO)-C-13) line luminosity ratio value of 16.1 +/- 2.5. Galaxies with pieces of evidence of possible merging activity tend to show higher L' ((CO)-C-12)/L' (13CO) ratios by a factor of 2, while variations of this order are also found in galaxy samples with higher star formation rates (SFRs) or star formation efficiencies (SFEs). We also find an average L' ((CO)-C-13)/L' ((CO)-O-18) line luminosity ratio of 2.5 +/- 0.6, which is in good agreement with those previously reported for starburst galaxies. We find that galaxy samples with high LIR, SFR, and SFE show low L' ((CO)-C-13)/L' ((CO)-O-18) line luminosity ratios with high L' ((CO)-C-12)/L' ((CO)-C-13) line luminosity ratios, suggesting that these trends are produced by selective enrichment of massive stars in young starbursts.
Subject headings
- NATURVETENSKAP -- Kemi -- Analytisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Analytical Chemistry (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
Keyword
- techniques: interferometric
- galaxies: star formation
- methods: statistical
- galaxies: ISM
Publication and Content Type
- art (subject category)
- ref (subject category)
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Mendez-Hernandez ...
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Ibar, E.
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Knudsen, Kirsten ...
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Cassata, P.
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Aravena, M.
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Michalowski, M. ...
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show more...
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Zhang, Zhi-Yu
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Lara-Lopez, M. A ...
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Ivison, R. J.
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van der Werf, P.
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Villanueva, V.
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Herrera-Camus, R ...
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Hughes, T. M.
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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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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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Environmental Sc ...
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Monthly Notices ...
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Chalmers University of Technology