no code implementations • 6 Oct 2020 • Stephanie H. Ho, Crystal L. Martin, Joop Schaye
We also examine how often Mg II gas around galaxies selected using a line-of-sight velocity cut includes gas physically outside of the virial radius ($r_\mathrm{vir}$).
Astrophysics of Galaxies
no code implementations • 3 Jun 2019 • Marcel P. van Daalen, Ian G. McCarthy, Joop Schaye
We conduct a detailed investigation of the dependence of the relative difference between the total matter power spectra in hydrodynamical and collisionless simulations on the effectiveness of stellar and AGN feedback, cosmology and redshift.
Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies
no code implementations • 30 Jul 2018 • Christopher Barber, Joop Schaye, Robert A. Crain
We find negative metallicity radial gradients for both simulations, but positive and flat [Mg/Fe] gradients in LoM-50 and HiM-50, respectively.
Astrophysics of Galaxies
no code implementations • 6 Dec 2017 • Ian G. McCarthy, Simeon Bird, Joop Schaye, Joachim Harnois-Deraps, Andreea S. Font, Ludovic van Waerbeke
Recent studies have presented evidence for tension between the constraints on Omega_m and sigma_8 from the cosmic microwave background (CMB) and measurements of large-scale structure (LSS).
Cosmology and Nongalactic Astrophysics
no code implementations • 18 Oct 2017 • Jaime Salcido, Richard G. Bower, Luke A. Barnes, Geraint F. Lewis, Pascal J. Elahi, Tom Theuns, Matthieu Schaller, Robert A. Crain, Joop Schaye
Interestingly, simulations without feedback from accreting black holes predict an upturn in the cosmic star formation rate for $t>15$ Gyr due to the rejuvenation of massive ($ > 10^{11} \mathrm{M}_{\odot}$) galaxies.
Cosmology and Nongalactic Astrophysics
no code implementations • 19 Sep 2016 • David G. Algorry, Julio F. Navarro, Mario G. Abadi, Laura V. Sales, Richard G. Bower, Robert A. Crain, Claudio Dalla Vecchia, Carlos S. Frenk, Matthieu Schaller, Joop Schaye, Tom Theuns
These discs show a wide range of bar strengths, from unbarred discs to weak bars to strongly barred systems (= 20%).
Astrophysics of Galaxies
no code implementations • 5 Sep 2016 • Alejandro Benítez-Llambay, Julio F. Navarro, Carlos S. Frenk, Till Sawala, Kyle Oman, Azadeh Fattahi, Matthieu Schaller, Joop Schaye, Robert A. Crain, Tom Theuns
We examine the baryon content of low-mass {\Lambda}CDM halos $(10^8<M_{200}/{\rm M_\odot}<5\times 10^{9})$ using the APOSTLE cosmological hydrodynamical simulations.
Astrophysics of Galaxies
no code implementations • 11 Jul 2016 • Ismael Ferrero, Julio F. Navarro, Mario G. Abadi, Laura V. Sales, Richard G. Bower, Robert A. Crain, Carlos S. Frenk, Matthieu Schaller, Joop Schaye, Tom Theuns
EAGLE galaxies evolve with lookback time following approximately the prescriptions of AM models and the observed mass-size relation of bright spirals, leading to a weak TFR evolution consistent with observation out to $z=1$.
Astrophysics of Galaxies
no code implementations • 8 Mar 2016 • Ian G. McCarthy, Joop Schaye, Simeon Bird, Amandine M. C. Le Brun
The evolution of the large-scale distribution of matter is sensitive to a variety of fundamental parameters that characterise the dark matter, dark energy, and other aspects of our cosmological framework.
Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies
no code implementations • 5 Oct 2015 • Stuart McAlpine, John C. Helly, Matthieu Schaller, James W. Trayford, Yan Qu, Michelle Furlong, Richard G. Bower, Robert A. Crain, Joop Schaye, Tom Theuns, Claudio Dalla Vecchia, Carlos S. Frenk, Ian G. McCarthy, Adrian Jenkins, Yetli Rosas-Guevara, Simon D. M. White, Maarten Baes, Peter Camps, Gerard Lemson
The free parameters of the subgrid models for feedback are calibrated to the redshift z=0 galaxy stellar mass function, galaxy sizes and black hole mass - stellar mass relation.
Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics
no code implementations • 2 Feb 2015 • Camila A. Correa, J. Stuart B. Wyithe, Joop Schaye, Alan R. Duffy
We present a semi-analytic, physically motivated model for dark matter halo concentration as a function of halo mass and redshift.
Cosmology and Nongalactic Astrophysics
no code implementations • 6 Jan 2015 • Robert A. Crain, Joop Schaye, Richard G. Bower, Michelle Furlong, Matthieu Schaller, Tom Theuns, Claudio Dalla Vecchia, Carlos S. Frenk, Ian G. McCarthy, John C. Helly, Adrian Jenkins, Yetli M. Rosas-Guevara, Simon D. M. White, James W. Trayford
We find that the properties of galaxies with stellar mass <~ M* (the "knee" of the galaxy stellar mass function) are largely governed by feedback associated with star formation, while those of more massive galaxies are also controlled by feedback from accretion onto their central black holes.
Astrophysics of Galaxies
1 code implementation • 25 Jul 2014 • Joop Schaye, Robert A. Crain, Richard G. Bower, Michelle Furlong, Matthieu Schaller, Tom Theuns, Claudio Dalla Vecchia, Carlos S. Frenk, I. G. McCarthy, John C. Helly, Adrian Jenkins, Y. M. Rosas-Guevara, Simon D. M. White, Maarten Baes, C. M. Booth, Peter Camps, Julio F. Navarro, Yan Qu, Alireza Rahmati, Till Sawala, Peter A. Thomas, James Trayford
Because the feedback efficiencies cannot be predicted from first principles, we calibrate them to the z~0 galaxy stellar mass function and the amplitude of the galaxy-central black hole mass relation, also taking galaxy sizes into account.
Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics
no code implementations • 6 Apr 2011 • Marcel P. van Daalen, Joop Schaye, C. M. Booth, Claudio Dalla Vecchia
Our simulation that includes AGN feedback, which we consider to be our most realistic simulation as, unlike those used in previous studies, it has been shown to solve the overcooling problem and to reproduce optical and X-ray observations of groups of galaxies, predicts a decrease in power relative to a dark matter only simulation ranging, at z=0, from 1% at k~0. 3 h/Mpc to 10% at k~1 h/Mpc and to 30% at k~10 h/Mpc.
Cosmology and Nongalactic Astrophysics
no code implementations • 28 Sep 2009 • Joop Schaye, Claudio Dalla Vecchia, C. M. Booth, Robert P. C. Wiersma, Tom Theuns, Marcel R. Haas, Serena Bertone, Alan R. Duffy, I. G. McCarthy, Freeke van de Voort
Galaxies form stars in a self-regulated fashion at a rate controlled by the balance between, on the one hand, feedback from massive stars and black holes and, on the other hand, gas cooling and accretion.
Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies
