2017
DOI: 10.1093/mnras/stx1597
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The new semi-analytic code GalICS 2.0 – reproducing the galaxy stellar mass function and the Tully–Fisher relation simultaneously

Abstract: GalICS 2.0 is a new semianalytic code to model the formation and evolution of galaxies in a cosmological context. N-body simulations based on a Planck cosmology are used to construct halo merger trees, track subhaloes, compute spins and measure concentrations. The accretion of gas onto galaxies and the morphological evolution of galaxies are modelled with prescriptions derived from hydrodynamic simulations. Star formation and stellar feedback are described with phenomenological models (as in other semianalytic… Show more

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Cited by 40 publications
(64 citation statements)
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References 192 publications
(392 reference statements)
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“…15 In the GALAXY module again assumptions enter in calculating disc radii and rotation speeds, because this SAM like others compute galaxy disc sizes by assuming that baryons and dark matter have the same angular momentum distribution and that angular momentum is also conserved, while knowing from cosmological hydrodynamical simulations that this is in fact not the case and angular momentum is not conserved. However, even if mistaken at the level of individual galaxies, the assumption is retained because of its statistical validity and agreement with observations (Cattaneo et al, 2017(Cattaneo et al, , p. 1405. 14 It is worth stressing in the words of Oman et al (2015) that "the rotation curves of many galaxies, dwarf included, are actually consistent with LCDM predictions.…”
Section: The Downscaling Problem For Lcdmmentioning
confidence: 94%
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“…15 In the GALAXY module again assumptions enter in calculating disc radii and rotation speeds, because this SAM like others compute galaxy disc sizes by assuming that baryons and dark matter have the same angular momentum distribution and that angular momentum is also conserved, while knowing from cosmological hydrodynamical simulations that this is in fact not the case and angular momentum is not conserved. However, even if mistaken at the level of individual galaxies, the assumption is retained because of its statistical validity and agreement with observations (Cattaneo et al, 2017(Cattaneo et al, , p. 1405. 14 It is worth stressing in the words of Oman et al (2015) that "the rotation curves of many galaxies, dwarf included, are actually consistent with LCDM predictions.…”
Section: The Downscaling Problem For Lcdmmentioning
confidence: 94%
“…On the SAMs side, Di Cintio and Lelli (2016), using semiempirical models have been able to reproduce the BTF relation but with a scatter higher than the observed one (unless parameters are tuned accordingly). But the real turning-point in this literature has been a very recent article by Cattaneo et al (2017) that has attracted significant attention in the community, with headlines along the lines of "dark matter theory triumphs" because of the unprecedented ability to retrieve both BTF relation and the Faber-Jackson relation (which is the equivalent of the BTF relation but not for spiral galaxies but for elliptical galaxies, in linking luminosity with stellar velocity dispersion). Let us take a closer look at how Cattaneo et al's new SAMdcalled GalICS 2.0dhas been able to achieve such a remarkable result.…”
Section: The Downscaling Problem For Lcdmmentioning
confidence: 99%
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