Molecular gas properties of UV-luminous star-forming galaxies at low redshift
| Autor: | Thiago S. Gonçalves, D. Christopher Martin, A. R. Basu-Zych, Laura M. Pérez, Roderik Overzier |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Physics
Luminous infrared galaxy education.field_of_study Cosmology and Nongalactic Astrophysics (astro-ph.CO) Star formation Extinction (astronomy) Population Astronomy FOS: Physical sciences Astronomy and Astrophysics Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Disc galaxy Astrophysics - Astrophysics of Galaxies Redshift Galaxy Interstellar medium Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics education Astrophysics::Galaxy Astrophysics Astrophysics - Cosmology and Nongalactic Astrophysics |
| Popis: | 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 Millimetre-wave Astronomy (CARMA) 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%) 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-luminous compact star-forming galaxies. 13 pages, 8 figures; accepted for publication in MNRAS |
| Databáze: | OpenAIRE |
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