VALES VI: ISM enrichment in star-forming galaxies up to z ∼0.2 using 12CO(1-0), 13CO(1-0), and C18O(1-0) line luminosity ratios

Méndez-Hernández, H.; Ibar, E.; Knudsen, K.; Cassata, P.; Aravena, M.; Michałowski, Michał J.; Zhang, Zhi-Yu; Lara-López, M.A.; Ivison, R.J.; Van Der Werf, P.; Villanueva, V.; Herrera-Camus, R.; Hughes, T.M.

doi:10.1093/mnras/staa1964

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VALES VI: ISM enrichment in star-forming galaxies up to z ∼0.2 using ¹²CO(1-0), ¹³CO(1-0), and C¹⁸O(1-0) line luminosity ratios

Authors:

H. Méndez-Hernández,
E. Ibar,
K. Knudsen,
P. Cassata,
M. Aravena,
Michał J. Michałowski,
Zhi-Yu Zhang,
M.A. Lara-López,
R.J. Ivison,
P. Van Der Werf,
V. Villanueva,
R. Herrera-Camus,
T.M. Hughes

Abstract

We present Atacama Large Millimeter/sub-millimeter Array (ALMA) observations towards 27 low-redshift (0.02 < z < 0.2) star-forming galaxies taken from the Valparaíso ALMA/APEX Line Emission Survey. We perform stacking analyses of the 12CO(1-0), 13CO(1-0), and C18O(1-0) emission lines to explore the L′ [12CO(1-0)]/L′ [13CO(1-0)] [hereafter L′ (12CO)/L′ (13CO)] and L′ [13CO(1-0)]/L′ [C18O(1-0)] [hereafter L′ (13CO)/L′ (C18O)] 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 109.8-10.9 M⊙ corresponding to typical star-forming and starburst galaxies at these redshifts. On average, we find an L′ (12CO)/L′ (13CO) line luminosity ratio value of 16.1 ± 2.5. Galaxies with pieces of evidence of possible merging activity tend to show higher L′ (12CO)/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′ (13CO)/L′ (C18O) 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′ (13CO)/L′ (C18O) line luminosity ratios with high L′ (12CO)/L′ (13CO) line luminosity ratios, suggesting that these trends are produced by selective enrichment of massive stars in young starbursts.

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Record ID: UAM82a1ac6ccf50494dae88bae90e0e313e
Author: H. Méndez-Hernández H. Méndez-Hernández,, External affiliation of publication: Universidad de Valparaiso
E. Ibar E. Ibar,, External affiliation of publication: Universidad de Valparaiso
K. Knudsen K. Knudsen,, External affiliation of publication: Chalmers University of Technology, Onsala Space Observatory
P. Cassata P. Cassata,, External affiliation of publication: Università degli Studi di Padova
M. Aravena M. Aravena,, External affiliation of publication: Universidad Diego Portales
Michał J. Michałowski Michał J. Michałowski,, Instytut Obserwatorium Astronomiczne [nowa struktura organizacyjna] (SNŚ/WyF/JBWF)Szkoła Nauk Ścisłych [nowa struktura organizacyjna] (SNŚ)
Zhi-Yu Zhang Zhi-Yu Zhang,, External affiliation of publication: Nanjing University
M.A. Lara-López M.A. Lara-López,, External affiliation of publication: Niels Bohr Institute
R.J. Ivison R.J. Ivison,, External affiliation of publication: European Southern Observatory Santiago
P. Van Der Werf P. Van Der Werf,, External affiliation of publication: Leiden Observatory Research Institute

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Journal series: Monthly Notices of the Royal Astronomical Society, ISSN 0035-8711, e-ISSN 1365-2966, [1365-2966]
Issue year: 2020
Vol: 497
Pages: 2771-2785
ASJC Classification: 1912 Space and Planetary Science; 3103 Astronomy and Astrophysics
DOI: DOI:10.1093/mnras/staa1964 Opening in a new tab
Language: (en) English
Score (nominal): 140
Score source: journalList
Score: Ministerial score = 140.0, 25-04-2022, ArticleFromJournal
Publication indicators: Scopus Citations = 4; WoS Citations = 3; Scopus SNIP: 2017 = 0.904; WoS Impact Factor: 2019 (2 years) = 5.356 - 2019 (5 years) =5.001

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Uniform Resource Identifier: https://researchportal.amu.edu.pl/info/article/UAM82a1ac6ccf50494dae88bae90e0e313e/

URN: urn:amu-prod:UAM82a1ac6ccf50494dae88bae90e0e313e

* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or PerishOpening in a new tab system.