Outputs (231)

What to expect from dynamical modelling of galactic haloes II: the spherical Jeans equation (2018)
Journal Article
Wang, W., Han, J., Cole, S., More, S., Frenk, C., & Schaller, M. (2018). What to expect from dynamical modelling of galactic haloes II: the spherical Jeans equation. Monthly Notices of the Royal Astronomical Society, 476(4), 5669-5680. https://doi.org/10.1093/mnras/sty706

The spherical Jeans equation (SJE) is widely used in dynamical modelling of the Milky Way (MW) halo potential. We use haloes and galaxies from the cosmological Millennium-II simulation and hydrodynamical APOSTLE simulations to investigate the perform... Read More about What to expect from dynamical modelling of galactic haloes II: the spherical Jeans equation.

Predictions for deep galaxy surveys with JWST from ΛCDM (2017)
Journal Article
Cowley, W., Baugh, C., Cole, S., Frenk, C., & Lacey, C. (2018). Predictions for deep galaxy surveys with JWST from ΛCDM. Monthly Notices of the Royal Astronomical Society, 474(2), 2352-2372. https://doi.org/10.1093/mnras/stx2897

We present predictions for the outcome of deep galaxy surveys with the James Webb Space Telescope (JWST) obtained from a physical model of galaxy formation in Λ cold dark matter. We use the latest version of the GALFORM model, embedded within a new (... Read More about Predictions for deep galaxy surveys with JWST from ΛCDM.

The core–cusp problem: a matter of perspective (2017)
Journal Article
Genina, A., Benítez-Llambay, A., Frenk, C. S., Cole, S., Fattahi, A., Navarro, J. F., …Theuns, T. (2017). The core–cusp problem: a matter of perspective. Monthly Notices of the Royal Astronomical Society, 474(1), 1398-1411. https://doi.org/10.1093/mnras/stx2855

The existence of two kinematically and chemically distinct stellar subpopulations in the Sculptor and Fornax dwarf galaxies offers the opportunity to constrain the density profile of their matter haloes by measuring the mass contained within the well... Read More about The core–cusp problem: a matter of perspective.

HBT+: an improved code for finding subhaloes and building merger trees in cosmological simulations (2017)
Journal Article
Han, J., Cole, S., Frenk, C., Benitez-Llambay, A., & Helly, J. (2018). HBT+: an improved code for finding subhaloes and building merger trees in cosmological simulations. Monthly Notices of the Royal Astronomical Society, 474(1), 604-617. https://doi.org/10.1093/mnras/stx2792

Dark matter subhalos are the remnants of (incomplete) halo mergers. Identifying them and establishing their evolutionary links in the form of merger trees is one of the most important applications of cosmological simulations. The HBT (Hierachical Bou... Read More about HBT+: an improved code for finding subhaloes and building merger trees in cosmological simulations.

Comparing galaxy formation in semi-analytic models and hydrodynamical simulations (2017)
Journal Article
Mitchell, P. D., Lacey, C. G., Lagos, C. D., Frenk, C. S., Bower, R. G., Cole, S., …Theuns, T. (2018). Comparing galaxy formation in semi-analytic models and hydrodynamical simulations. Monthly Notices of the Royal Astronomical Society, 474(1), 492-521. https://doi.org/10.1093/mnras/stx2770

It is now possible for hydrodynamical simulations to reproduce a representative galaxy population. Accordingly, it is timely to assess critically some of the assumptions of traditional semi-analytic galaxy formation models. We use the EAGLE simulatio... Read More about Comparing galaxy formation in semi-analytic models and hydrodynamical simulations.

The Pan-STARRS1 Medium-deep Survey: Star Formation Quenching in Group and Cluster Environments (2017)
Journal Article
Jian, H., Lin, L., Lin, K., Foucaud, S., Chen, C., Chiueh, T., …Waters, C. (2017). The Pan-STARRS1 Medium-deep Survey: Star Formation Quenching in Group and Cluster Environments. Astrophysical Journal, 845(1), Article 74. https://doi.org/10.3847/1538-4357/aa7de2

We make use of a catalog of 1600 Pan-STARRS1 groups produced by the probability friends-of-friends algorithm to explore how the galaxy properties, i.e., the specific star formation rate (SSFR) and quiescent fraction, depend on stellar mass and group-... Read More about The Pan-STARRS1 Medium-deep Survey: Star Formation Quenching in Group and Cluster Environments.

Modelling galaxy merger time-scales and tidal destruction (2017)
Journal Article
Simha, V., & Cole, S. (2017). Modelling galaxy merger time-scales and tidal destruction. Monthly Notices of the Royal Astronomical Society, 472(2), 1392-1400. https://doi.org/10.1093/mnras/stx1942

We present a model for the dynamical evolution of subhaloes based on an approach combining numerical and analytical methods. Our method is based on tracking subhaloes in an N-body simulation up to the latest epoch that it can be resolved, and applyin... Read More about Modelling galaxy merger time-scales and tidal destruction.

A lightcone catalogue from the Millennium-XXL simulation (2017)
Journal Article
Smith, A., Cole, S., Baugh, C., Zheng, Z., Angulo, R., Norberg, P., & Zehavi, I. (2017). A lightcone catalogue from the Millennium-XXL simulation. Monthly Notices of the Royal Astronomical Society, 470(4), 4646-4661. https://doi.org/10.1093/mnras/stx1432

Future galaxy surveys require realistic mock catalogues to understand and quantify systematics in order to make precise cosmological measurements. We present a halo lightcone catalogue and halo occupation distribution (HOD) galaxy catalogue built usi... Read More about A lightcone catalogue from the Millennium-XXL simulation.

What to expect from dynamical modelling of galactic haloes (2017)
Journal Article
Wang, W., Han, J., Cole, S., Frenk, C., & Sawala, T. (2017). What to expect from dynamical modelling of galactic haloes. Monthly Notices of the Royal Astronomical Society, 470(2), 2351-2366. https://doi.org/10.1093/mnras/stx1334

Many dynamical models of the Milky Way halo require assumptions that the distribution function of a tracer population should be independent of time (i.e. a steady-state distribution function) and that the underlying potential is spherical. We study t... Read More about What to expect from dynamical modelling of galactic haloes.

Comparing semi-analytic particle tagging and hydrodynamical simulations of the Milky Way's stellar halo (2017)
Journal Article
Cooper, A., Cole, S., Frenk, C., Le Bret, T., & Pontzen, A. (2017). Comparing semi-analytic particle tagging and hydrodynamical simulations of the Milky Way's stellar halo. Monthly Notices of the Royal Astronomical Society, 469(2), 1691-1712. https://doi.org/10.1093/mnras/stx955

Particle tagging is an efficient, but approximate, technique for using cosmological N-body simulations to model the phase-space evolution of the stellar populations predicted, for example, by a semi-analytic model of galaxy formation. We test the tec... Read More about Comparing semi-analytic particle tagging and hydrodynamical simulations of the Milky Way's stellar halo.