1 code implementation • 20 Nov 2019 • Anna Genina, Justin I. Read, Carlos S. Frenk, Shaun Cole, Alejandro Benitez-Llambay, Aaron D. Ludlow, Julio F. Navarro, Kyle A. Oman, Andrew Robertson
A non-parametric higher-order Jeans analysis method, GravSphere, was recently used to constrain the density profiles of Local Group dwarf galaxies, classifying them into those that are more likely to have an inner dark matter cusp and those that are likely to have a core (Read et al.).
Astrophysics of Galaxies
1 code implementation • 11 Nov 2019 • Marius Cautun, Alejandro Benitez-Llambay, Alis J. Deason, Carlos S. Frenk, Azadeh Fattahi, Facundo A. Gómez, Robert J. J. Grand, Kyle A. Oman, Julio F. Navarro, Christine M. Simpson
We provide a best-fitting contracted NFW halo model to the MW rotation curve that matches the data very well.
Astrophysics of Galaxies
2 code implementations • 24 Oct 2018 • Alexander H. Riley, Azadeh Fattahi, Andrew B. Pace, Louis E. Strigari, Carlos S. Frenk, Facundo A. Gómez, Robert J. J. Grand, Federico Marinacci, Julio F. Navarro, Rüdiger Pakmor, Christine M. Simpson, Simon D. M. White
We analyse the orbital kinematics of the Milky Way (MW) satellite system utilizing the latest systemic proper motions for 38 satellites based on data from $Gaia$ Data Release 2.
Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics
no code implementations • 25 Sep 2018 • Oliver Newton, Marius Cautun, Adrian Jenkins, Carlos S. Frenk, John C. Helly
The Milky Way's (MW) satellite population is a powerful probe of warm dark matter (WDM) models as the abundance of small substructures is very sensitive to the properties of the WDM particle.
Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics
no code implementations • 14 Aug 2017 • Oliver Newton, Marius Cautun, Adrian Jenkins, Carlos S. Frenk, John Helly
We predict that half of our estimated total satellite population of the MW should be detected by the Large Synoptic Survey Telescope.
Astrophysics of Galaxies
no code implementations • 25 Jul 2017 • Alejandro Benitez-Llambay, Julio F. Navarro, Carlos S. Frenk, Aaron D. Ludlow
EAGLE low-mass discs are non-self-gravitating so the softening plays no role in their vertical structure.
Astrophysics of Galaxies
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 • 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
2 code implementations • 7 Sep 2015 • Jiaxin Han, Shaun Cole, Carlos S. Frenk, Yipeng Jing
N-body simulations suggest that the substructures that survive inside dark matter haloes follow universal distributions in mass and radial number density.
Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies
1 code implementation • 2 Jul 2015 • Jiaxin Han, Wenting Wang, Shaun Cole, Carlos S. Frenk
We develop two general methods to infer the gravitational potential of a system using steady-state tracers, i. e., tracers with a time-independent phase-space distribution.
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
5 code implementations • 5 Apr 2005 • Volker Springel, Simon D. M. White, Adrian Jenkins, Carlos S. Frenk, Naoki Yoshida, Liang Gao, Julio Navarro, Robert Thacker, Darren Croton, John Helly, John A. Peacock, Shaun Cole, Peter Thomas, Hugh Couchman, August Evrard, Joerg Colberg, Frazer Pearce
The cold dark matter model has become the leading theoretical paradigm for the formation of structure in the Universe.
astro-ph
no code implementations • 30 Aug 2004 • Zheng Zheng, Andreas A. Berlind, David H. Weinberg, Andrew J. Benson, Carlton M. Baugh, Shaun Cole, Romeel Dave, Carlos S. Frenk, Neal Katz, Cedric G. Lacey
In agreement with earlier results for dark matter subhalos, we find that the mean occupation function <N> for galaxies above a baryonic mass threshold can be approximated by a step function for central galaxies plus a power law for satellites, and that the distribution of satellite numbers is close to Poisson at fixed halo mass.
astro-ph