Search Results for author: Carlos S. Frenk

Found 16 papers, 7 papers with code

To beta or not to beta: can higher-order Jeans analysis break the mass-anisotropy degeneracy in simulated dwarfs?

1 code implementation20 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

The Milky Way total mass profile as inferred from Gaia DR2

1 code implementation11 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

The velocity anisotropy of the Milky Way satellite system

2 code implementations24 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

The Milky Way's total satellite population and constraining the mass of the warm dark matter particle

no code implementations25 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

The total satellite population of the Milky Way

no code implementations14 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

The vertical structure of gaseous galaxy discs in cold dark matter halos

no code implementations25 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

Barred galaxies in the EAGLE cosmological hydrodynamical simulation

no code implementations19 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

The properties of "dark" ΛCDM halos in the Local Group

no code implementations5 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

Size matters: abundance matching, galaxy sizes, and the Tully-Fisher relation in EAGLE

no code implementations11 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

The EAGLE simulations of galaxy formation: public release of halo and galaxy catalogues

no code implementations5 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

A unified model for the spatial and mass distribution of subhaloes

2 code implementations7 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

The orbital PDF: general inference of the gravitational potential from steady-state tracers

1 code implementation2 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

The EAGLE simulations of galaxy formation: calibration of subgrid physics and model variations

no code implementations6 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

The EAGLE project: Simulating the evolution and assembly of galaxies and their environments

1 code implementation25 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

Theoretical Models of the Halo Occupation Distribution: Separating Central and Satellite Galaxies

no code implementations30 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

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