Constraints on galaxy formation models from the galaxy stellar mass function and its evolution

Abstract

We explore the parameter space of the semi-analytic galaxy formation model GALFORM, studying the constraints imposed by measurements of the galaxy stellar mass function (GSMF) and its evolution. We use the Bayesian Emulator method to quickly eliminate vast implausible volumes of the parameter space and zoom in on the most interesting regions, allowing us to identify a set of models that match the observational data within model uncertainties. We find that the GSMF strongly constrains parameters related to quiescent star formation in discs, stellar and AGN feedback and threshold for disc instabilities, but weakly restricts other parameters. Constraining the model using local data alone does not usually select models that match the evolution of the GSMF well. Nevertheless, we show that a small subset of models provides acceptable match to GSMF data out to redshift 1.5. We explore the physical significance of the parameters of these models, in particular exploring whether the model provides a better description if the mass loading of the galactic winds generated by starbursts (${\beta }_{0,\text{burst}}$) and quiescent disks (${\beta }_{0,\text{disc}}$) is different. Performing a principal component analysis of the plausible volume of the parameter space, we write a set of relations between parameters obeyed by plausible models with respect to GSMF evolution. We find that while ${\beta }_{0,\text{disc}}$ is strongly constrained by GSMF evolution data, constraints on ${\beta }_{0,\text{burst}}$ are weak. Although it is possible to find plausible models for which ${\beta }_{0,\text{burst}}={\beta }_{0,\text{disc}}$, most plausible models have ${\beta }_{0,\text{burst}}>{\beta }_{0,\text{disc}}$, implying - for these - larger SN feedback efficiency at higher redshifts.

19 pages, 10 figures. Accepted for publication in MNRAS

References in corpus (13)

• An ultra-deep near-infrared spectrum of a compact quiescent galaxy at z=2.2
• The Role of Pressure in GMC Formation II: The H_2 - Pressure Relation
• A primer on hierarchical galaxy formation: the semi-analytical approach
• Ram pressure stripping the hot gaseous halos of galaxies in groups and clusters
• Generating Dark Matter Halo Merger Trees
• Stellar Masses and SFRs for 1M Galaxies from SDSS and WISE
• Black Hole Growth in Hierarchical Galaxy Formation
• The SINFONI Nearby Elliptical Lens Locator Survey: Discovery of two new low-redshift strong lenses and implications for the initial mass function in giant early-type galaxies
• Monte Carlo Markov Chain Parameter Estimation in Semi-Analytic Models of Galaxy Formation
• The origin of the atomic and molecular gas contents of early-type galaxies. I. A new test of galaxy formation physics
• Galaxy Formation: Bayesian History Matching for the Observable Universe
• Building a Predictive Model of Galaxy Formation - I: Phenomenological Model Constrained to the $z=0$ Stellar Mass Function
• Monolithic or hierarchical star formation? A new statistical analysis

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