![]() Two conditions for galaxy quenching: compact centres and massive haloes. ![]() The green valley is a red herring: Galaxy Zoo reveals two evolutionary pathways towards quenching of star formation in early- and late-type galaxies. The influence of the environmental history on quenching star formation in a Λ cold dark matter universe. Galaxy evolution in groups and clusters: satellite star formation histories and quenching time-scales in a hierarchical Universe. The evolution of the dust and gas content in galaxies. Molecular and total gas scaling relations. Cold gas properties of the Herschel Reference Survey. Constraints on star formation driven galaxy winds from the mass-metallicity relation at z = 0. On the galaxy stellar mass function, the mass-metallicity relation and the implied baryonic mass function. Feedback and recycled wind accretion: assembling the z = 0 galaxy mass function. Chemical enrichment of the intracluster and intergalactic medium in a hierarchical galaxy formation model. Mass and environment as drivers of galaxy evolution in SDSS and zCOSMOS and the origin of the Schechter function. Galaxy bimodality due to cold flows and shock heating. The origin of star formation gradients in rich galaxy clusters. The evolution of disk galaxies and the origin of S0 galaxies. Gone with the wind: the origin of S0 galaxies in clusters. Ram pressure stripping of spiral galaxies in clusters. On the infall of matter into clusters of galaxies and some effects on their evolution. Massive molecular outflows and evidence for AGN feedback from CO observations. The Sins/zC-Sinf survey of z ∼ 2 galaxy kinematics: evidence for powerful active galactic nucleus-driven nuclear outflows in massive star-forming galaxies. High-velocity outflows without AGN feedback: Eddington-limited star formation in compact massive galaxies. Evidence of strong quasar feedback in the early Universe. Unified, merger-driven model of the origin of starbursts, quasars, the cosmic X-ray background, supermassive black holes, and galaxy spheroids. Energy input from quasars regulates the growth and activity of black holes and their host galaxies. This result is further supported independently by the stellar age difference between quiescent and star-forming galaxies, which indicates that quiescent galaxies of less than 10 11 solar masses are on average observed four billion years after quenching due to strangulation.ĭi Matteo, T., Springel, V. Here we report an analysis of the stellar metallicity (the fraction of elements heavier than helium in stellar atmospheres) in local galaxies, from 26,000 spectra, that clearly reveals that strangulation is the primary mechanism responsible for quenching star formation, with a typical timescale of four billion years, at least for local galaxies with a stellar mass less than 10 11 solar masses. ![]() An alternative mechanism is so-called “strangulation” 10, 11, 12, 13, 14, in which the supply of cold gas to the galaxy is halted. Sudden removal of gas through outflows 1, 2, 3, 4, 5, 6 or stripping 7, 8, 9 is one of the mechanisms often proposed. The primary mechanism responsible for quenching star formation in galaxies and transforming them into quiescent and passive systems is still unclear. Local galaxies are broadly divided into two main classes, star-forming (gas-rich) and quiescent (passive and gas-poor).
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