Signatures of Cool Gas Fueling a Star-Forming Galaxy at Redshift 2.3

被引：201

作者：

Bouche, N. ^{[1
,2
]}

Murphy, M. T. ^{[3
]}

Kacprzak, G. G. ^{[3
]}

Peroux, C. ^{[4
]}

Contini, T. ^{[1
,2
]}

Martin, C. L. ^{[5
]}

Dessauges-Zavadsky, M. ^{[6
]}

机构：

[1] CNRS, IRAP, F-31400 Toulouse, France

[2] Univ Toulouse, UPS OMP, IRAP, F-31400 Toulouse, France

[3] Swinburne Univ Technol, Hawthorn, Vic 3122, Australia

[4] Aix Marseille Univ, CNRS, LAM, UMR 7326, F-13388 Marseille, France

[5] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[6] Observ Geneva, CH-1290 Versoix, Switzerland

来源：

SCIENCE | 2013年 / 341卷 / 6141期

基金：

澳大利亚研究理事会; 美国国家科学基金会;

关键词：

MASS ACCRETION RATES; COLD STREAMS; HALOES; ABSORPTION; OUTFLOWS;

D O I：

10.1126/science.1234209

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Galaxies are thought to be fed by the continuous accretion of intergalactic gas, but direct observational evidence has been elusive. The accreted gas is expected to orbit about the galaxy's halo, delivering not just fuel for star formation but also angular momentum to the galaxy, leading to distinct kinematic signatures. We report observations showing these distinct signatures near a typical distant star-forming galaxy, where the gas is detected using a background quasar passing 26 kiloparsecs from the host. Our observations indicate that gas accretion plays a major role in galaxy growth because the estimated accretion rate is comparable to the star-formation rate.

引用

页码：50 / 53

页数：4

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