Skip to main content

Research Repository

Advanced Search

Professor Carlos Frenk's Outputs (589)

The FLAMINGO project: the coupling between baryonic feedback and cosmology in light of the S8 tension (2025)
Journal Article
Elbers, W., Frenk, C. S., Jenkins, A., Li, B., Helly, J. C., Kugel, R., Schaller, M., Schaye, J., Braspenning, J., Kwan, J., McCarthy, I. G., Salcido, J., van Daalen, M. P., Vandenbroucke, B., & Pascoli, S. (2025). The FLAMINGO project: the coupling between baryonic feedback and cosmology in light of the S8 tension. Monthly Notices of the Royal Astronomical Society, 537(2), 2160-2178. https://doi.org/10.1093/mnras/staf093

Large-scale structure surveys have reported measurements of the density of matter, Ωm, and the amplitude of clustering, σ8, that are in tension with the values inferred from observations of the cosmic microwave background. While this may be a sign of... Read More about The FLAMINGO project: the coupling between baryonic feedback and cosmology in light of the S8 tension.

Star Stream Velocity Distributions in Cold Dark Matter and Warm Dark Matter Galactic Halos (2024)
Journal Article
Carlberg, R. G., Jenkins, A., Frenk, C. S., & Cooper, A. P. (2024). Star Stream Velocity Distributions in Cold Dark Matter and Warm Dark Matter Galactic Halos. The Astrophysical Journal, 975(1), Article 135. https://doi.org/10.3847/1538-4357/ad7b35

The dark matter subhalos orbiting in a galactic halo perturb the orbits of stars in thin stellar streams. Over time, the random velocities in the streams develop non-Gaussian wings. The rate of velocity increase is approximately a random walk at a ra... Read More about Star Stream Velocity Distributions in Cold Dark Matter and Warm Dark Matter Galactic Halos.

Apostle–Auriga: Effects of stellar feedback subgrid models on the evolution of angular momentum in disc galaxies (2024)
Journal Article
Yang, H., Liao, S., Fattahi, A., Frenk, C. S., Gao, L., Guo, Q., Shao, S., Wang, L., Wright, R. J., & Zeng, G. (2024). Apostle–Auriga: Effects of stellar feedback subgrid models on the evolution of angular momentum in disc galaxies. Monthly Notices of the Royal Astronomical Society, 535(2), 1394-1405. https://doi.org/10.1093/mnras/stae2411

Utilizing the Apostle–Auriga simulations, which start from the same zoom-in initial conditions of Local Group-like systems but run with different galaxy formation subgrid models and hydrodynamic solvers, we study the impact of stellar feedback models... Read More about Apostle–Auriga: Effects of stellar feedback subgrid models on the evolution of angular momentum in disc galaxies.

EIGER. VI. The Correlation Function, Host Halo Mass, and Duty Cycle of Luminous Quasars at z ≳ 6 (2024)
Journal Article
Eilers, A.-C., Mackenzie, R., Pizzati, E., Matthee, J., Hennawi, J. F., Zhang, H., Bordoloi, R., Kashino, D., Lilly, S. J., Naidu, R. P., Simcoe, R. A., Yue, M., Frenk, C. S., Helly, J. C., Schaller, M., & Schaye, J. (2024). EIGER. VI. The Correlation Function, Host Halo Mass, and Duty Cycle of Luminous Quasars at z ≳ 6. The Astrophysical Journal, 974(2), Article 275. https://doi.org/10.3847/1538-4357/ad778b

We expect luminous (M 1450 ≲ −26.5) high-redshift quasars to trace the highest-density peaks in the early Universe. Here, we present observations of four z ≳ 6 quasar fields using JWST/NIRCam in the imaging and wide-field slitless spectroscopy mode a... Read More about EIGER. VI. The Correlation Function, Host Halo Mass, and Duty Cycle of Luminous Quasars at z ≳ 6.

A warm dark matter cosmogony may yield more low-mass galaxy detections in 21-cm surveys than a cold dark matter one (2024)
Journal Article
Oman, K. A., Frenk, C. S., Crain, R. A., Lovell, M. R., & Pfeffer, J. (2024). A warm dark matter cosmogony may yield more low-mass galaxy detections in 21-cm surveys than a cold dark matter one. Monthly Notices of the Royal Astronomical Society, 533(1), 67-78. https://doi.org/10.1093/mnras/stae1772

The 21-cm spectral line widths, w50, of galaxies are an approximate tracer of their dynamical masses, such that the dark matter halo mass function is imprinted in the number density of galaxies as a function of w50. Correcting observed number counts... Read More about A warm dark matter cosmogony may yield more low-mass galaxy detections in 21-cm surveys than a cold dark matter one.

Unveiling lens light complexity with a novel multi-Gaussian expansion approach for strong gravitational lensing (2024)
Journal Article
He, Q., Nightingale, J. W., Amvrosiadis, A., Robertson, A., Cole, S., Frenk, C. S., Massey, R., Li, R., Cao, X., Lange, S. C., & França, J. P. C. (2024). Unveiling lens light complexity with a novel multi-Gaussian expansion approach for strong gravitational lensing. Monthly Notices of the Royal Astronomical Society, 532(2), 2441-2462. https://doi.org/10.1093/mnras/stae1577

In a strong gravitational lensing system, the distorted light from a source is analysed to infer the properties of the lens. However, light emitted by the lens itself can contaminate the image of the source, introducing systematic errors in the analy... Read More about Unveiling lens light complexity with a novel multi-Gaussian expansion approach for strong gravitational lensing.

AuriDESI: mock catalogues for the DESI Milky Way Survey (2024)
Journal Article
Kizhuprakkat, N., Cooper, A. P., Riley, A. H., Koposov, S. E., Aguilar, J. N., Ahlen, S., Allende Prieto, C., Brooks, D., Claybaugh, T., Dawson, K., de la Macorra, A., Doel, P., Forero-Romero, J. E., Frenk, C., Gaztañaga, E., Gnedin, O. Y., Grand, R. J. J., Gontcho A Gontcho, S., Honscheid, K., Kehoe, R., …Zhou, Z. (2024). AuriDESI: mock catalogues for the DESI Milky Way Survey. Monthly Notices of the Royal Astronomical Society, 531(4), 4108-4137. https://doi.org/10.1093/mnras/stae1415

The Dark Energy Spectroscopic Instrument Milky Way Survey (DESI MWS) will explore the assembly history of the Milky Way by characterizing remnants of ancient dwarf galaxy accretion events and improving constraints on the distribution of dark matter i... Read More about AuriDESI: mock catalogues for the DESI Milky Way Survey.

Strong gravitational lensing’s ‘external shear’ is not shear (2024)
Journal Article
Etherington, A., Nightingale, J., Massey, R., Tam, S.-I., Cao, X., Niemiec, A., He, Q., Robertson, A., Li, R., Amvrosiadis, A., Cole, S., Diego, J., Frenk, C., Frye, B., Harvey, D., Jauzac, M., Koekemoer, A., Lagattuta, D., Lange, S., Limousin, M., …Steinhardt, C. (2024). Strong gravitational lensing’s ‘external shear’ is not shear. Monthly Notices of the Royal Astronomical Society, 531(3), 3684-3697. https://doi.org/10.1093/mnras/stae1375

The distribution of mass in galaxy-scale strong gravitational lenses is often modelled as an elliptical power-law plus ‘external shear’, which notionally accounts for neighbouring galaxies and cosmic shear along our line of sight. A small amount of e... Read More about Strong gravitational lensing’s ‘external shear’ is not shear.

Hydrodynamical simulations of merging galaxy clusters: giant dark matter particle colliders, powered by gravity (2024)
Journal Article
Sirks, E. L., Harvey, D., Massey, R., Oman, K. A., Robertson, A., Frenk, C., Everett, S., Gill, A. S., Lagattuta, D., & McCleary, J. (2024). Hydrodynamical simulations of merging galaxy clusters: giant dark matter particle colliders, powered by gravity. Monthly Notices of the Royal Astronomical Society, 530(3), 3160-3170. https://doi.org/10.1093/mnras/stae1012

Terrestrial particle accelerators collide charged particles, then watch the trajectory of outgoing debris – but they cannot manipulate dark matter. Fortunately, dark matter is the main component of galaxy clusters, which are continuously pulled toget... Read More about Hydrodynamical simulations of merging galaxy clusters: giant dark matter particle colliders, powered by gravity.

Non-linear CMB lensing with neutrinos and baryons: FLAMINGO simulations versus fast approximations (2024)
Journal Article
Upadhye, A., Kwan, J., McCarthy, I. G., Salcido, J., Helly, J. C., Kugel, R., …Broxterman, J. C. (2024). Non-linear CMB lensing with neutrinos and baryons: FLAMINGO simulations versus fast approximations. Monthly Notices of the Royal Astronomical Society, 529(2), 1862-1876. https://doi.org/10.1093/mnras/stae663

Weak lensing of the cosmic microwave background is rapidly emerging as a powerful probe of neutrinos, dark energy, and new
physics. We present a fast computation of the non-linear CMB lensing power spectrum that combines non-linear perturbation
the... Read More about Non-linear CMB lensing with neutrinos and baryons: FLAMINGO simulations versus fast approximations.

The FLAMINGO project: baryonic impact on weak gravitational lensing convergence peak counts (2024)
Journal Article
Broxterman, J. C., Schaller, M., Schaye, J., Hoekstra, H., Kuijken, K., Helly, J. C., Kugel, R., Braspenning, J., Elbers, W., Frenk, C. S., Kwan, J., McCarthy, I. G., Salcido, J., van Daalen, M. P., & Vandenbroucke, B. (2024). The FLAMINGO project: baryonic impact on weak gravitational lensing convergence peak counts. Monthly Notices of the Royal Astronomical Society, 529(3), 2309-2326. https://doi.org/10.1093/mnras/stae698

Weak gravitational lensing convergence peaks, the local maxima in weak lensing convergence maps, have been shown to contain valuable cosmological information complementary to commonly used two-point statistics. To exploit the full power of weak lensi... Read More about The FLAMINGO project: baryonic impact on weak gravitational lensing convergence peak counts.

Inferring the dark matter splashback radius from cluster gas and observable profiles in the FLAMINGO simulations (2024)
Journal Article
Towler, I., Kay, S. T., Schaye, J., Kugel, R., Schaller, M., Braspenning, J., …Altamura, E. (2024). Inferring the dark matter splashback radius from cluster gas and observable profiles in the FLAMINGO simulations. Monthly Notices of the Royal Astronomical Society, 529(3), 2017-2031. https://doi.org/10.1093/mnras/stae654

The splashback radius, coinciding with the minimum in the dark matter radial density gradient, is thought to be a universal definition of the edge of a dark matter halo. Observational methods to detect it have traced the dark matter using weak gravit... Read More about Inferring the dark matter splashback radius from cluster gas and observable profiles in the FLAMINGO simulations.

The impact and response of mini-haloes and the interhalo medium on cosmic reionization (2024)
Journal Article
Chan, T. K., Benítez-Llambay, A., Theuns, T., Frenk, C., & Bower, R. (2024). The impact and response of mini-haloes and the interhalo medium on cosmic reionization. Monthly Notices of the Royal Astronomical Society, 528(2), 1296-1326. https://doi.org/10.1093/mnras/stae114

An ionization front (I-front) that propagates through an inhomogeneous medium is slowed down by self-shielding and recombination's. We perform cosmological radiation hydrodynamics simulations of the I-front propagation during the epoch of cosmic reio... Read More about The impact and response of mini-haloes and the interhalo medium on cosmic reionization.

The mass accretion history of dark matter haloes down to Earth mass (2023)
Journal Article
Liu, Y., Gao, L., Bose, S., Frenk, C. S., Jenkins, A., Springel, V., Wang, J., White, S. D. M., & Zheng, H. (2023). The mass accretion history of dark matter haloes down to Earth mass. Monthly Notices of the Royal Astronomical Society, 527(4), 11740-11750. https://doi.org/10.1093/mnras/stae003

We take advantage of the unprecedented dynamical range provided by the ‘Cosmic-Zoom’ project to study the mass accretion history (MAH) of present-day dark matter haloes o v er the entire mass range present in the Lambda cold dark matter paradigm when... Read More about The mass accretion history of dark matter haloes down to Earth mass.

Scanning for dark matter subhaloes in Hubble Space Telescope imaging of 54 strong lenses (2023)
Journal Article
Nightingale, J. W., He, Q., Cao, X., Amvrosiadis, A., Etherington, A., Frenk, C. S., Hayes, R. G., Robertson, A., Cole, S., Lange, S., Li, R., & Massey, R. (2024). Scanning for dark matter subhaloes in Hubble Space Telescope imaging of 54 strong lenses. Monthly Notices of the Royal Astronomical Society, 527(4), 10480-10506. https://doi.org/10.1093/mnras/stad3694

The cold dark matter (DM) model predicts that every galaxy contains thousands of DM subhaloes; almost all other DM models include a physical process that smooths away the subhaloes. The subhaloes are invisible, but could be detected via strong gravit... Read More about Scanning for dark matter subhaloes in Hubble Space Telescope imaging of 54 strong lenses.