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Extragalactic Stellar Tidal Streams: Observations meet Simulation
Juan Miro-Carretero, Maria A. Gomez-Flechoso, David Martinez-Delgado +11
According to the well established hierarchical framework for galaxy evolution, galaxies grow through mergers with other galaxies and the LambdaCDM cosmological model predicts that…
FLAMINGO: combining kinetic SZ effect and galaxy-galaxy lensing measurements to gauge the impact of feedback on large-scale structure
Ian G. McCarthy, Alexandra Amon, Joop Schaye +13
Energetic feedback processes associated with accreting supermassive black holes can expel gas from massive haloes and significantly alter various measures of clustering on ~Mpc sca…
Galaxy Mass Modelling from Multi-Wavelength JWST Strong Lens Analysis: Dark Matter Substructure, Angular Mass Complexity, or Both?
Samuel C. Lange, Aristeidis Amvrosiadis, James W. Nightingale +8
We analyze two galaxy-scale strong gravitational lenses, SPT0418-47 and SPT2147-50, using JWST NIRCam imaging across multiple filters. To account for angular complexity in the lens…
Constraints on the properties of MSM dark matter using the satellite galaxies of the Milky Way
Oliver Newton, Mark R. Lovell, Carlos S. Frenk +4
Low-mass galaxies provide a powerful tool with which to investigate departures from the standard cosmological paradigm in models that suppress the abundance of small dark matter st…
Apostle--Auriga: Effects of stellar feedback subgrid models on the evolution of angular momentum in disc galaxies
Hang Yang, Shihong Liao, Azadeh Fattahi +7
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 a…
Apocalypse When? No Certainty of a Milky Way -- Andromeda Collision
Till Sawala, Jehanne Delhomelle, Alis J. Deason +5
It is commonly believed that our own Milky Way is on a collision course with the neighbouring Andromeda galaxy. As a result of their merger, predicted in around five billion years,…
Lopsidedness in Early-Type Galaxies: the role of the multipole in Isophote Fitting and Strong Lens Modelling
Aristeidis Amvrosiadis, James W. Nightingale, Qiuhan He +6
The surface brightness distribution of massive early-type galaxies (ETGs) often deviates from a perfectly elliptical shape. To capture these deviations in their isophotes during an…
Negative neutrino masses as a mirage of dark energy
Willem Elbers, Carlos S. Frenk, Adrian Jenkins +2
The latest cosmological constraints on the sum of the neutrino masses depend on prior physical assumptions about the mass spectrum. To test the accordance of cosmological and labor…
A comparison of pre-existing CDM predictions with the abundance of {\it JWST} galaxies at high redshift
Shengdong Lu, Carlos S. Frenk, Sownak Bose +4
Observations with the {\it James Webb Space Telescope} have revealed a high abundance of bright galaxies at redshift, , which has been widely interpreted as conflictin…
Star Stream Velocity Distributions in CDM and WDM Galactic Halos
Raymond G. Carlberg, Adrian Jenkins, Carlos S. Frenk +1
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 onset of bar formation in a massive galaxy at
Aristeidis Amvrosiadis, Samuel Lange, James Nightingale +13
We examine the morphological and kinematical properties of SPT-2147, a strongly lensed, massive, dusty, star-forming galaxy at . Combining data from JWST, HST, and ALMA,…
Unveiling Lens Light Complexity with A Novel Multi-Gaussian Expansion Approach for Strong Gravitational Lensing
Qiuhan He, James W. Nightingale, Aris Amvrosiadis +8
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 contamina…
The influence of baryons on low-mass haloes
Haonan Zheng, Sownak Bose, Carlos S. Frenk +6
The Voids-within-Voids-within-Voids (VVV) project used dark-matter-only simulations to study the abundance and structure of dark matter haloes over the full mass range populated in…
The FLAMINGO project: the coupling between baryonic feedback and cosmology in light of the tension
Willem Elbers, Carlos S. Frenk, Adrian Jenkins +12
Large-scale structure surveys have reported measurements of the density of matter, , and the amplitude of clustering, , that are in tension with the values infer…
A unified model for the clustering of quasars and galaxies at
Elia Pizzati, Joseph F. Hennawi, Joop Schaye +12
Recent observations from the EIGER JWST program have measured for the first time the quasar-galaxy cross-correlation function at . The auto-correlation function of faint…
EIGER VI. The Correlation Function, Host Halo Mass and Duty Cycle of Luminous Quasars at
Anna-Christina Eilers, Ruari Mackenzie, Elia Pizzati +13
We expect luminous () high-redshift quasars to trace the highest density peaks in the early universe. Here, we present observations of four quasa…
A warm dark matter cosmogony may yield more low-mass galaxy detections in 21-cm surveys than a cold dark matter one
Kyle A. Oman, Carlos S. Frenk, Robert A. Crain +2
The 21-cm spectral line widths, , of galaxies are an approximate tracer of their dynamical masses, such that the dark matter halo mass function is imprinted in the number d…