Professor Carlos Frenk's Outputs (17)

The twisted dark matter halo of the Milky Way (2020)
Journal Article
Shao, S., Cautun, M., Deason, A., & Frenk, C. S. (2021). The twisted dark matter halo of the Milky Way. Monthly Notices of the Royal Astronomical Society, 504(4), 6033-6048. https://doi.org/10.1093/mnras/staa3883

We analyse systems analogous to the Milky Way (MW) in the EAGLE cosmological hydrodynamics simulation in order to deduce the likely structure of the MW’s dark matter (DM) halo. We identify MW mass haloes in the simulation whose satellite galaxies hav... Read More about The twisted dark matter halo of the Milky Way.

The detailed structure and the onset of galaxy formation in low-mass gaseous dark matter haloes (2020)
Journal Article
Benitez-Llambay, A., & Frenk, C. (2020). The detailed structure and the onset of galaxy formation in low-mass gaseous dark matter haloes. Monthly Notices of the Royal Astronomical Society, 498(4), 4887-4900. https://doi.org/10.1093/mnras/staa2698

We present a model for the formation of the first galaxies before and after the reionization of hydrogen in the early universe. In this model, galaxy formation can only take place in dark matter haloes whose mass exceeds a redshift-dependent critical... Read More about The detailed structure and the onset of galaxy formation in low-mass gaseous dark matter haloes.

Universal structure of dark matter haloes over a mass range of 20 orders of magnitude (2020)
Journal Article
Wang, J., Bose, S., Frenk, C., Gao, L., Jenkins, A., Springel, V., & White, S. (2020). Universal structure of dark matter haloes over a mass range of 20 orders of magnitude. Nature, 585(7823), 39-42. https://doi.org/10.1038/s41586-020-2642-9

Cosmological models in which dark matter consists of cold elementary particles predict that the dark halo population should extend to masses many orders of magnitude below those at which galaxies can form1,2,3. Here we report a cosmological simulatio... Read More about Universal structure of dark matter haloes over a mass range of 20 orders of magnitude.

Local group star formation in warm and self-interacting dark matter cosmologies (2020)
Journal Article
Lovell, M., Hellwing, W., Ludlow, A., Zavala, J., Robertson, A., Fattahi, A., Frenk, C., & Hardwick, J. (2020). Local group star formation in warm and self-interacting dark matter cosmologies. Monthly Notices of the Royal Astronomical Society, 498(1), 702-717. https://doi.org/10.1093/mnras/staa2525

The nature of the dark matter can affect the collapse time of dark matter haloes, and can therefore be imprinted in observables such as the stellar population ages and star formation histories of dwarf galaxies. In this paper, we use high-resolution... Read More about Local group star formation in warm and self-interacting dark matter cosmologies.

To β or not to β: can higher-order Jeans analysis break the mass–anisotropy degeneracy in simulated dwarfs? (2020)
Journal Article
Genina, A., Read, J., Frenk, C., Cole, S., Benítez-Llambay, A., Ludlow, A., Navarro, J., Oman, K., & Robertson, A. (2020). To β or not to β: can higher-order Jeans analysis break the mass–anisotropy degeneracy in simulated dwarfs?. Monthly Notices of the Royal Astronomical Society, 498(1), 144-163. https://doi.org/10.1093/mnras/staa2352

We test a non-parametric higher-order Jeans analysis method, GRAVSPHERE, on 32 simulated dwarf galaxies comparable to classical Local Group dwarfs like Fornax. The galaxies are selected from the APOSTLE suite of cosmological hydrodynamics simulations... Read More about To β or not to β: can higher-order Jeans analysis break the mass–anisotropy degeneracy in simulated dwarfs?.

A tale of two populations: surviving and destroyed dwarf galaxies and the build-up of the Milky Way’s stellar halo (2020)
Journal Article
Fattahi, A., Deason, A. J., Frenk, C. S., Simpson, C. M., Gómez, F. A., Grand, R. J., Monachesi, A., Marinacci, F., & Pakmor, R. (2020). A tale of two populations: surviving and destroyed dwarf galaxies and the build-up of the Milky Way’s stellar halo. Monthly Notices of the Royal Astronomical Society, 497(4), 4459-4471. https://doi.org/10.1093/mnras/staa2221

We use magneto-hydrodynamical simulations of Milky Way-mass haloes from the Auriga project to investigate the properties of surviving and destroyed dwarf galaxies that are accreted by these haloes over cosmic time. We show that the combined luminosit... Read More about A tale of two populations: surviving and destroyed dwarf galaxies and the build-up of the Milky Way’s stellar halo.

How Unusual is the Milky Way’s Assembly History? (2020)
Journal Article
Evans, T. A., Fattahi, A., Deason, A. J., & Frenk, C. S. (2020). How Unusual is the Milky Way’s Assembly History?. Monthly Notices of the Royal Astronomical Society, 497(4), 4311-4321. https://doi.org/10.1093/mnras/staa2202

In the ΛCDM model of structure formation galactic haloes build up by accretion of mass and mergers of smaller haloes. The most recent massive merger event experienced by the Milky Way (MW) halo was the accretion of the Large Magellanic Cloud (LMC; wh... Read More about How Unusual is the Milky Way’s Assembly History?.

The dark matter component of the Gaia radially anisotropic substructure (2020)
Journal Article
Bozorgnia, N., Fattahi, A., Frenk, C., Cheek, A., Cerdeño, D., Gómez, F., Grand, R., & Marinacci, F. (2020). The dark matter component of the Gaia radially anisotropic substructure. Journal of Cosmology and Astroparticle Physics, 2020(7), Article 036. https://doi.org/10.1088/1475-7516/2020/07/036

We study the properties of the dark matter component of the radially anisotropic stellar population recently identified in the Gaia data, using magneto-hydrodynamical simulations of Milky Way-like halos from the Auriga project. We identify 10 simulat... Read More about The dark matter component of the Gaia radially anisotropic substructure.

The orbital phase space of contracted dark matter haloes (2020)
Journal Article
Pakmor, R., Marinacci, F., Grand, R. J., Frenk, C. S., Deason, A. J., Cautun, M., & Callingham, T. M. (2020). The orbital phase space of contracted dark matter haloes. Monthly Notices of the Royal Astronomical Society, 495(1), 12-28. https://doi.org/10.1093/mnras/staa1089

We study the orbital phase space of dark matter (DM) haloes in the AURIGA suite of cosmological hydrodynamics simulations of Milky Way (MW) analogues. We characterize haloes by their spherical action distribution, F(Jr,L)⁠, a function of the specific... Read More about The orbital phase space of contracted dark matter haloes.

Constraining the inner density slope of massive galaxy clusters (2020)
Journal Article
He, Q., Li, H., Li, R., Frenk, C. S., Schaller, M., Barnes, D., Bahé, Y., Kay, S. T., Gao, L., & Vecchia, C. D. (2020). Constraining the inner density slope of massive galaxy clusters. Monthly Notices of the Royal Astronomical Society, 496(4), 4717-4733. https://doi.org/10.1093/mnras/staa1769

We determine the inner density profiles of massive galaxy clusters (M200 > 5 × 1014 M⊙) in the Cluster-EAGLE (C-EAGLE) hydrodynamic simulations, and investigate whether the dark matter density profiles can be correctly estimated from a combination of... Read More about Constraining the inner density slope of massive galaxy clusters.

The Edge of the Galaxy (2020)
Journal Article
Deason, A. J., Fattahi, A., Frenk, C. S., Grand, R. J., Oman, K. A., Garrison-Kimmel, S., Simpson, C. M., & Navarro, J. F. (2020). The Edge of the Galaxy. Monthly Notices of the Royal Astronomical Society, 496(3), 3929-3942. https://doi.org/10.1093/mnras/staa1711

We use cosmological simulations of isolated Milky Way (MW)-mass galaxies, as well as Local Group (LG) analogues, to define the ‘edge’ – a caustic manifested in a drop in density or radial velocity – of Galactic-sized haloes, both in dark matter and i... Read More about The Edge of the Galaxy.

Download by parachute: retrieval of assets from high altitude balloons (2020)
Journal Article
Sirks, E., Clark, P., Massey, R., Benton, S., Brown, A., Damaren, C., Eifler, T., Fraisse, A., Frenk, C., Funk, M., Galloway, M., Gill, A., Hartley, J., Holder, B., Huff, E., Jauzac, M., Jones, W., Lagattuta, D., Leung, J.-Y., Li, L., …Tam, S.-I. (2020). Download by parachute: retrieval of assets from high altitude balloons. Journal of Instrumentation, 15(05), Article P05014. https://doi.org/10.1088/1748-0221/15/05/p05014

We present a publicly-available toolkit of flight-proven hardware and software to retrieve 5 TB of data or small physical samples from a stratospheric balloon platform. Before launch, a capsule is attached to the balloon, and rises with it. Upon remo... Read More about Download by parachute: retrieval of assets from high altitude balloons.

The little things matter: relating the abundance of ultrafaint satellites to the hosts’ assembly history (2020)
Journal Article
Frenk, C. S., Belokurov, V., Deason, A. J., & Bose, S. (2020). The little things matter: relating the abundance of ultrafaint satellites to the hosts’ assembly history. Monthly Notices of the Royal Astronomical Society, 495(1), 743-757. https://doi.org/10.1093/mnras/staa1199

Ultrafaint dwarf galaxies (M⋆ ≤ 105 M⊙) are relics of an early phase of galaxy formation. They contain some of the oldest and most metal-poor stars in the Universe which likely formed before the epoch of hydrogen reionisation. These galaxies are so f... Read More about The little things matter: relating the abundance of ultrafaint satellites to the hosts’ assembly history.

Baryonic clues to the puzzling diversity of dwarf galaxy rotation curves (2020)
Journal Article
Santos-Santos, I. M., Navarro, J. F., Robertson, A., Benítez-Llambay, A., Oman, K. A., Lovell, M. R., Frenk, C. S., Ludlow, A. D., Fattahi, A., & Ritz, A. (2020). Baryonic clues to the puzzling diversity of dwarf galaxy rotation curves. Monthly Notices of the Royal Astronomical Society, 495(1), 58-77. https://doi.org/10.1093/mnras/staa1072

We use a compilation of disc galaxy rotation curves to assess the role of the luminous component (‘baryons’) in the rotation curve diversity problem. As in earlier work, we find that rotation curve shape correlates with baryonic surface density: high... Read More about Baryonic clues to the puzzling diversity of dwarf galaxy rotation curves.

The Milky Way total mass profile as inferred from Gaia DR2 (2020)
Journal Article
Cautun, M., Benítez-Llambay, A., Deason, A. J., Frenk, C. S., Fattahi, A., Gómez, F. A., Grand, R. J., Oman, K. A., Navarro, J. F., & Simpson, C. M. (2020). The Milky Way total mass profile as inferred from Gaia DR2. Monthly Notices of the Royal Astronomical Society, 494(3), 4291-4313. https://doi.org/10.1093/mnras/staa1017

We determine the Milky Way (MW) mass profile inferred from fitting physically motivated models to the Gaia DR2 Galactic rotation curve and other data. Using various hydrodynamical simulations of MW-mass haloes, we show that the presence of baryons in... Read More about The Milky Way total mass profile as inferred from Gaia DR2.

The missing dwarf galaxies of the Local Group (2020)
Journal Article
Fattahi, A., Navarro, J. F., & Frenk, C. S. (2020). The missing dwarf galaxies of the Local Group. Monthly Notices of the Royal Astronomical Society, 493(2), 2596-2605. https://doi.org/10.1093/mnras/staa375

We study the Local Group (LG) dwarf galaxy population predicted by the APOSTLE ΛCDM cosmological hydrodynamics simulations. These indicate that: (i) the total mass within 3 Mpc of the Milky Way-Andromeda midpoint (M3Mpc) typically exceeds ∼3 times th... Read More about The missing dwarf galaxies of the Local Group.

Coming of age of the standard model (2020)
Journal Article
Blandford, R., Dunkley, J., Frenk, C., Lahav, O., & Shapley, A. (2020). Coming of age of the standard model. Nature Astronomy, 4, 122-123. https://doi.org/10.1038/s41550-020-1012-8

Cosmology now has a standard model — a remarkably simple description of the Universe, its contents and its history. A symposium held last September in Cambridge, UK, gave this model a ‘health check’ and discussed fascinating questions that lie beyond... Read More about Coming of age of the standard model.