Molecular gas properties of UV-bright star-forming galaxies at low redshift

被引：12

作者：

Goncalves, Thiago S. ^{[1
]}

Basu-Zych, Antara ^{[2
]}

Overzier, Roderik A. ^{[3
]}

Perez, Laura ^{[4
]}

Martin, D. Christopher ^{[5
]}

机构：

[1] Univ Fed Rio de Janeiro, Observ Valongo, BR-20080090 Rio De Janeiro, RJ, Brazil

[2] NASA, Goddard Space Flight Ctr, Lab Xray Astrophys, Greenbelt, MD 20771 USA

[3] Observ Nacl, BR-20921400 Rio De Janeiro, RJ, Brazil

[4] Natl Radio Astron Observ, Socorro, NM 87801 USA

[5] CALTECH, Pasadena, CA 91125 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2014年 / 442卷 / 02期

基金：

美国国家科学基金会;

关键词：

galaxies: formation; galaxies: ISM; galaxies: starburst; LYMAN BREAK GALAXY; MASS-METALLICITY RELATION; ULTRAVIOLET-LUMINOUS GALAXIES; H-2 CONVERSION FACTOR; FORMATION LAW; SUBMILLIMETER GALAXIES; INTERSTELLAR-MEDIUM; NEARBY GALAXIES; MAIN-SEQUENCE; SELF-REGULATION;

D O I：

10.1093/mnras/stu852

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Lyman break analogues (LBAs) are a population of star-forming galaxies at low redshift (z similar to 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.

引用

页码：1429 / 1439

页数：11

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