Star formation sustained by gas accretion

• DOI: 10.1007/s00159-014-0071-1
• Publication Date: 2014-07-15T11:33:21Z
• Authors: Jorge Sánchez Alm...; Bruce G. Elmegreen; Casiana Muñoz-Tuñón; Debra Meloy Elmeg...
• Keywords: Intergalactic star; Intermediate polar

Numerical simulations predict that metal-poor gas accretion from the cosmic web fuels formation of disk galaxies. This paper discusses how controls star formation, and summarizes physical properties expected for accreted by The also collects observational evidence sustaining formation. It reviews inferred neutral ionized hydrogen, as well stars. A number characterizing large samples star-forming galaxies can be explained accretion, in particular, relationship among stellar mass, metallicity, star-formation rate (the so-called fundamental metallicity relationship). They are put forward analyzed. Theory predicts to particularly important at high redshift, so indications based on distant objects reviewed, including global history universe, around absorption features spectra background sources.