no code implementations • 2 Nov 2020 • Isaac Alonso Asensio, Claudio Dalla Vecchia
We show that, limiting the cache size (in bits) to double the typical number of neighbouring particles, 70 per cent of the redundant calculations can be avoided, yielding a speed-up of almost 35 per cent.
Instrumentation and Methods for Astrophysics Astrophysics of Galaxies Computational Physics
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 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 • 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
