The nature of early-type galaxies in hierarchical models

Speaker:
    Cesario Almeida
Affiliation:
    SHAO-MAP
Time:
    Sept.4th, 2:00PM
Location:
    3th floor, small conf. room
Abstract:
We describe the properties of early-type galaxies in the context of hierarchical galaxy formation. We use two variants of the GALFORM model originally introduced by Cole et al.: the Baugh et al. and the Bower et al. models. We test the prescription defined by Cole et al. to calculate the sizes of bulges, by comparing GALFORM predictions with local observational data.

We also explore the physics of massive galaxy formation in the models, by predicting the abundance, properties and clustering of luminous red galaxies (LRGs). Given their rarity, bright luminosities and extreme colours, LRGs represent a stern challenge for the models.  Finally, we introduce a new technique based on artificial neural networks which allows us to make accurate predictions for the spectral energy distributions of large samples of galaxies, at wavelengths ranging from the far-ultra-violet to the sub-millimetre and radio. This technique will allow the generation of wide-angle mock catalogues of galaxies selected at rest-frame UV or mid-and far-infrared wavelengths.


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