Shaping the galaxy stellar mass function with supernova- and AGN-driven winds
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TLDR
In this article, an energy-driven outflow model was proposed for galaxy formation in representative regions of the universe. But it is not a good fit for the observed galaxy stellar mass function, since the high-mass end can be recovered simultaneously with feedback from active galactic nuclei and a correction for diffuse stellar light plausibly missed in observations.Abstract:
Cosmological hydrodynamical simulations of galaxy formation in representative regions of the Universe typically need to resort to subresolution models to follow some of the feedback processes crucial for galaxy formation. Here, we show that an energy-driven outflow model in which the wind velocity decreases and the wind mass loading increases in low-mass galaxies, as suggested by observations, can produce a good match to the low-mass end of the observed galaxy stellar mass function. The high-mass end can be recovered simultaneously if feedback from active galactic nuclei (AGN) and a correction for diffuse stellar light plausibly missed in observations are included. At the same time, our model is in good agreement with the stellar mass functions at redshifts z=1 and z=2, and with the observed redshift evolution of the cosmic star formation rate density. In addition, it accurately reproduces the observed gas to stellar mass ratios and specific star formation rates of galaxies as a function of their stellar mass. This agreement with a diverse set of data marks significant progress in hydrodynamically modelling the formation of a representative galaxy population. It also suggests that the mass flux in real galactic winds should strongly increase towards low-mass galaxies. Without this assumption, an overproduction of galaxies at the faint-end of the galaxy luminosity function seems inevitable in our models.read more
Citations
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The EAGLE project: Simulating the evolution and assembly of galaxies and their environments
Joop Schaye,Robert A. Crain,Richard G. Bower,Michelle Furlong,Matthieu Schaller,Tom Theuns,Tom Theuns,Claudio Dalla Vecchia,Claudio Dalla Vecchia,Carlos S. Frenk,Ian G. McCarthy,John C. Helly,Adrian Jenkins,Yetli Rosas-Guevara,Simon D. M. White,Maarten Baes,C. M. Booth,C. M. Booth,Peter Camps,Julio F. Navarro,Yan Qu,Alireza Rahmati,Till Sawala,Peter A. Thomas,James W. Trayford +24 more
TL;DR: The Virgo Consortium's EAGLE project as discussed by the authors is a suite of hydrodynamical simulations that follow the formation of galaxies and black holes in representative volumes, where thermal energy is injected into the gas, allowing winds to develop without predetermined speed or mass loading factors.
Journal ArticleDOI
Galaxies on FIRE (Feedback In Realistic Environments): stellar feedback explains cosmologically inefficient star formation
Philip F. Hopkins,Philip F. Hopkins,Dušan Kereš,Jose Oñorbe,Claude André Faucher-Giguère,Claude André Faucher-Giguère,Eliot Quataert,Norman Murray,James S. Bullock +8 more
TL;DR: In this paper, the authors present a series of high-resolution cosmological simulations of galaxy formation to z = 0, spanning halo masses ∼ 10.8−10.13−M⊙, and stellar masses ∼10.4−10^(11)
Journal ArticleDOI
The EAGLE simulations of galaxy formation: calibration of subgrid physics and model variations
Robert A. Crain,Robert A. Crain,Joop Schaye,Richard G. Bower,Michelle Furlong,Matthieu Schaller,Tom Theuns,Claudio Dalla Vecchia,Claudio Dalla Vecchia,Carlos S. Frenk,Ian G. McCarthy,John C. Helly,Adrian Jenkins,Yetli Rosas-Guevara,Simon D. M. White,James W. Trayford +15 more
TL;DR: In this article, the authors present results from thirteen cosmological simulations that explore the parameter space of the "Evolution and Assembly of GaLaxies and their Environments" (EAGLE) simulation project.
Journal ArticleDOI
Introducing the Illustris Project: the evolution of galaxy populations across cosmic time
Shy Genel,Mark Vogelsberger,Volker Springel,Volker Springel,Debora Sijacki,Dylan Nelson,Greg Snyder,Vicente Rodriguez-Gomez,Paul Torrey,Lars Hernquist +9 more
TL;DR: In this article, the authors present an overview of galaxy evolution across cosmic time in the Illustris Simulation, an N-body/hydrodynamical simulation that evolves 2*1820^3 resolution elements in a (106.5Mpc)^3 box from cosmological initial conditions down to z=0 using the AREPO moving-mesh code.
Journal ArticleDOI
A model for cosmological simulations of galaxy formation physics
Mark Vogelsberger,Shy Genel,Debora Sijacki,Paul Torrey,Volker Springel,Volker Springel,Lars Hernquist +6 more
TL;DR: In this article, a new comprehensive model of the physics of galaxy formation designed for large-scale hydrodynamical simulations of structure formation using the moving mesh code AREPO is presented.
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