Cosmological Simulations of Galaxy Formation II: Matching the Observational Properties of Disk Galaxies

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dc.creatorGovernato, Fabio
dc.creatorWillman, Beth
dc.creatorMayer, Lucio
dc.date2005-10-31
dc.date.accessioned2026-07-07T06:44:47Z
dc.date.available2026-07-07T06:44:47Z
dc.descriptionWe used fully cosmological, high resolution N-body + SPH simulations to follow the formation of disk galaxies with a rotational velocity between 140 and 280 Km/sec in a Lambda CDM universe. The simulations include gas cooling, star formation, the effects of a uniform UV background and a physically motivated description of feedback from supernovae. The host dark matter halos have a spin and last major merger redshift typical of galaxy sized halos as measured in recent large scale N-Body simulations. Galaxies formed rotationally supported disks with realistic exponential scale lengths and fall on the I-band and baryonic Tully Fisher relations. The combination of UV background and SN feedback drastically reduced the number of visible satellites orbiting inside a Milky Way sized halo, bringing it fair agreement with observations. Feedback delays SF in small galaxies and more massive ones contain older stellar populations. The current star formation rates as a function of galaxy stellar mass are in good agreement with those measured by the SDSS.
dc.descriptionLaTeX, 6 pages. To appear in the proceedings of the "Island Universes: Structure and Evolution of Disk Galaxies" conference held in Terschelling, Netherlands, July 2005, ed. R. de Jong (Springer: Dordrecht)
dc.identifierhttps://arxiv.org/abs/astro-ph/0511005
dc.identifierhttp://arxiv.org/abs/astro-ph/0511005
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/102860
dc.subjectAstrophysics
dc.titleCosmological Simulations of Galaxy Formation II: Matching the Observational Properties of Disk Galaxies
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