![]() ![]() 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. Skumanich A (1972) Time scales for CA II emission decay, rotational braking, and lithium depletion.Local galaxies are broadly divided into two main classes, star-forming (gas-rich) and quiescent (passive and gas-poor). Semel M (1989) Zeeman–Doppler imaging of active stars. Astrophys Space Sci 336:163–167īlackman EG, Tarduno JA (2018) Mass, energy, and momentum capture from stellar winds by magnetized and unmagnetized planets: implications for atmospheric erosion and habitability. Vink JS (2011) The theory of stellar winds. In: Byrne PB, Rodono M (eds), IAU colloquium 71: activity in red-dwarf stars, volume 102 of astrophysics and space science library, pp 379–385 Vogt SS, Penrod GD (1983) Doppler imaging of starspots. Vogt SS, Penrod GD (1983) Doppler imaging of spotted stars-application to the RS Canum Venaticorum star HR 1099. In: Byrne PB, Rodono, M (eds), IAU colloquium 71: activity in red-dwarf stars, volume 102 of astrophysics and space science library, pp 137–155 Vogt SS (1983), Spots, spot-cycles, and magnetic fields of late-type dwarfs. Desidera S et al (2003) A search for planets the metal-enriched binary HD 219542. ![]()
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