Galaxy formation in a variety of hierarchical models
نویسندگان
چکیده
منابع مشابه
The high redshift galaxy population in hierarchical galaxy formation models
We compare observations of the high redshift galaxy population to the predictions of the galaxy formation model of Croton et al. (2006). This model, implemented on the Millennium Simulation of the concordance ΛCDM cosmogony, introduces “radio mode” feedback from the central galaxies of groups and clusters in order to obtain quantitative agreement with the luminosity, colour, morphology and clus...
متن کاملHierarchical Galaxy Formation
We describe the GALFORM semi-analytic model for calculating the formation and evolution of galaxies in hierarchical clustering cosmologies. It improves upon, and extends, the earlier scheme developed by Cole et al. (1994). The model employs a new Monte-Carlo algorithm to follow the merging evolution of dark matter halos with arbitrary mass resolution. It incorporates realistic descriptions of t...
متن کاملNatural Downsizing in Hierarchical Galaxy Formation
Stellar-population analyses of today’s galaxies show “downsizing”, where the stars in more massive galaxies tend to have formed earlier and over a shorter time span. We show that this phenomenon is not necessarily “anti-hierarchical” but rather has its natural roots in the bottom-up clustering process of dark-matter haloes. While the main progenitor does indeed show an opposite effect, the inte...
متن کاملAbundance ratios in hierarchical galaxy formation
The chemical enrichment and stellar abundance ratios of galaxies which form in a hierarchical clustering scheme are calculated. For this purpose I adopt the star formation histories (SFH) as they are delivered by semi-analytic models in Kauffmann (1996). It turns out that the average SFH of cluster ellipticals does not yield globally α-enhanced stellar populations. The star burst that occurs wh...
متن کاملThe formation of galaxy disks in a hierarchical Universe
The formation of galactic disks and the efficiency of star formation within them are issues central to our understanding of galaxy formation. We have developed a detailed and versatile model of disk formation which combines the strengths of previous studies of isolated disks with those of hierarchical galaxy formation models. Disk structure is inferred from the distribution of angular momentum ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1995
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/274.3.755