Molecular gas properties of UV-bright star-forming galaxies at low redshift
Abstract
Lyman break analogues (LBAs) are a population of star-forming galaxies at low redshift (z ∼ 0.2) selected in the ultraviolet (UV). These objects present higher star formation rates and lower dust extinction than other galaxies with similar masses and luminosities in the local universe. In this work, we present results from a survey with the Combined Array for Research in Millimeter-wave Astronomy (CARMA) array to detect CO(1–0) emission in LBAs, in order to analyse the properties of the molecular gas in these galaxies. Our results show that LBAs follow the same Schmidt–Kennicutt law as local galaxies. On the other hand, they have higher gas fractions (up to 66 per cent) and faster gas depletion time-scales (below 1 Gyr). These characteristics render these objects more akin to high-redshift star-forming galaxies. We conclude that LBAs are a great nearby laboratory for studying the cold interstellar medium in low-metallicity, UV-bright compact star-forming galaxies.
Additional Information
© 2014 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. Accepted 2014 April 28. Received 2014 April 4. In original form 2013 December 10. First published online June 16, 2014. We thank the anonymous referee for suggestions that helped improve this paper. We would also like to thank Andrew Baker and Tim Heckman for useful comments. TSG gratefully acknowledges CAPES (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior) for financial support. Support for CARMA construction was derived from the states of California, Illinois, and Maryland, the James S. McDonnell Foundation, the Gordon and Betty Moore Foundation, the Kenneth T. and Eileen L. Norris Foundation, the University of Chicago, the Associates of the California Institute of Technology, and the National Science Foundation. Ongoing CARMA development and operations are supported by the National Science Foundation under a cooperative agreement, and by the CARMA partner universities.Attached Files
Published - MNRAS-2014-Gonçalves-1429-39.pdf
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Additional details
- Eprint ID
- 49056
- Resolver ID
- CaltechAUTHORS:20140829-092052049
- Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
- Created
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2014-08-29Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field
- Caltech groups
- Space Astrophysics Laboratory