A unified multiwavelength model of galaxy formation

Lacey, Cedric G.; Baugh, C. M.; Frenk, Carlos S.; Benson, Andrew; Bower, Richard G.; Cole, Shaun; González-Pérez, Violeta; Helly, John; Lagos, Claudia del P.; Mitchell, Peter D.

doi:10.1093/mnras/stw1888

Cited by 427 publications

(706 citation statements)

References 255 publications

(349 reference statements)

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“…The GP14 model was calibrated on the MS-W7 simulation (Guo et al 2013;Lacey et al 2016a), which adopts the same WMAP7 cosmology as the simulations used in this work but has a much larger volume (500h −1 M pc) 3 and a lower mass resolution of 9.35 × 10 8 h −1 M⊙. The GP14 model successfully reproduces a wide range of observations (Gonzalez-Perez et al 2014;Lagos et al 2015;Merson et al 2016).…”

Section: Model Galaxiesmentioning

confidence: 88%

“…Thin solid: the top 3 per cent massive galaxies; dashed: galaxies with stellar mass between the 85 per cent and 97 per cent distributions; dotted: the 85 per cent least massive galaxies. As reference, black crosses are observational estimates compiled by Hopkins (2007), where SFRs have been adjusted to the assumption of a Kennicutt IMF following Lacey et al (2016b).…”

Section: Mass Assembly and Sfr Historiesmentioning

confidence: 99%

“…α cool controls when a halo can be affected by AGN feedback (see equation 12 in Lacey et al 2016a). In Re-GP14, smaller values of α cool correspond to AGN feedback affecting fewer galaxies, which in turn alters the bright-end slope of the luminosity and stellar mass functions.…”

Section: Appendix C: the Re-gp14 Modelmentioning

confidence: 99%

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The galaxy population in cold and warm dark matter cosmologies

Wang

González-Pérez²,

Xie

et al. 2017

Monthly Notices of the Royal Astronomical Society

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We use a pair of high resolution N-body simulations implementing two dark matter models, namely the standard cold dark matter (CDM) cosmogony and a warm dark matter (WDM) alternative where the dark matter particle is a 1.5 keV thermal relic. We combine these simulations with the GALFORM semi-analytical galaxy formation model in order to explore differences between the resulting galaxy populations. We use GALFORM model variants for CDM and WDM that result in the same z = 0 galaxy stellar mass function by construction. We find that most of the studied galaxy properties have the same values in these two models, indicating that both dark matter scenarios match current observational data equally well. Even in under-dense regions, where discrepancies in structure formation between CDM and WDM are expected to be most pronounced, the galaxy properties are only slightly different. The only significant difference in the local universe we find is in the galaxy populations of "Local Volumes", regions of radius 1 to 8Mpc around simulated Milky Way analogues. In such regions our WDM model provides a better match to observed local galaxy number counts and is five times more likely than the CDM model to predict subregions within them that are as empty as the observed Local Void. Thus, a highly complete census of the Local Volume and future surveys of void regions could provide constraints on the nature of dark matter.

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Section: Model Galaxiesmentioning

confidence: 88%

Section: Mass Assembly and Sfr Historiesmentioning

confidence: 99%

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The galaxy population in cold and warm dark matter cosmologies

Wang

González-Pérez²,

Xie

et al. 2017

Monthly Notices of the Royal Astronomical Society

Self Cite

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“…This model, described comprehensively by Lacey et al (2016), assumes two initial mass functions (IMFs), one for quiescent star formation and a different one for star bursts -an approach which improves the model predictions for number counts and redshift distribution of sub-millimetre galaxies. The model presented here assumes a universal IMF, which considerably simplifies comparison with the galaxy stellar mass function.…”

Section: Galaxy Formation Modelmentioning

confidence: 99%

“…We outline the physical meaning of parameters related to star formation and feedback in the subsections below, for further details, we refer the reader to the original papers, and to Lacey et al (2016).…”

Section: Varied Parametersmentioning

confidence: 99%

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

Rodrigues

Vernon

Bower

2016

Mon. Not. R. Astron. Soc.

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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 (β 0,burst ) and quiescent disks (β 0,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 β 0,disc is strongly constrained by GSMF evolution data, constraints on β 0,burst are weak. Although it is possible to find plausible models for which β 0,burst = β 0,disc , most plausible models have β 0,burst > β 0,disc , implying -for these -larger SN feedback efficiency at higher redshifts.

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2018

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A unified multiwavelength model of galaxy formation

Cited by 427 publications

References 255 publications

The galaxy population in cold and warm dark matter cosmologies

The galaxy population in cold and warm dark matter cosmologies

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

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