Journal
SCIENCE
Volume 341, Issue 6141, Pages 50-53Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1234209
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Funding
- NSF [1066293, AST-1109288]
- Marie Curie International Outgoing Fellowship [PIOF-GA-2009-236012]
- Marie Curie International Career Integration Grant within European Community [PCIG11-GA-2012-321702]
- Australian Research Council for a QEII Fellowship [DP0877998]
- Discovery Project grant [DP130100568]
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [1109288] Funding Source: National Science Foundation
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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.
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