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Transformational astrophysics and exoplanet science with Habitable Worlds Observatory's High Resolution Imager
Vincent Van Eylen, Richard Massey, Saeeda Awan +167
Habitable Worlds Observatory (HWO) will be NASA's flagship space telescope of the 2040s, designed to search for life on other planets and to transform broad areas of astrophysics.…
How massive neutrinos reshape the cosmic web
Leonor N. L. Simões, Krishna Naidoo, Benjamin Joachimi +2
We explore the effects of massive neutrinos on the cosmic web using the FLAMINGO simulations. We classify the cosmic web into voids, sheets, filaments, and clusters, and find that…
Unveiling the population of massive quenched galaxies at in the COLIBRE simulations - I. Galaxy demographics
Ángel Chandro-Gómez, Claudia del P. Lagos, Chris Power +14
The James Webb Space Telescope has uncovered a substantial population of Massive (), Quenched Galaxies (MQGs) in the early Universe ($z \ge…
Kennicutt-Schmidt relation of galaxies over 13 billion years in the COLIBRE hydrodynamical simulations
Claudia del P. Lagos, Joop Schaye, Matthieu Schaller +16
We investigate the correlation between star formation rate (SFR) surface density and gas surface density (known as the Kennicutt-Schmidt, KS, relation) at kiloparsec (kpc) scales a…
The abundance of thin dwarf galaxies: a challenge for cosmological simulations
José A. Benavides, Laura V. Sales, Julio F. Navarro +4
We study the prevalence of thin galaxies as a function of stellar mass in the range using data from the GAMA, DESI, ALFALFA, and Nearby…
Dynamical disequilibrium in dwarf galaxies: rethinking gas dynamics, rotation curves, and dark matter inference
Diego Dado, Kyle A. Oman, Katherine E. Harborne +9
We quantify departures from hydrodynamical and centrifugal equilibrium in the gas discs of low-mass () galaxies from the COLIBR…
Gravitational potential drives the concentration dependence of the stellar mass-halo mass relation
Kai Wang, Joop Schaye, Alejandro Benítez-Llambay +8
We investigate the origin of the scatter in the stellar mass-halo mass (SMHM) relation using the \colibre cosmological hydrodynamical simulations. At fixed halo mass, we find a cle…
Reproducing Abell 2744 with the HyperMillennium Simulation
Qiao Wang, Ming Li, Liang Gao +11
We present the Hyper Millennium (HM) simulation, an extremely large cosmological simulation designed to support next-generation galaxy surveys. The simulation follows 4.2 trillion…
Non-explosive pre-supernova feedback in the COLIBRE model of galaxy formation
Alejandro Benítez-Llambay, Sylvia Ploeckinger, Joop Schaye +7
We present the implementation and testing of a subgrid non-explosive pre-supernova (NEPS) feedback module for the COLIBRE model of galaxy formation. The NEPS module incorporates th…
The evolution of the galaxy stellar mass function and star formation rates in the COLIBRE simulations from redshift 17 to 0
Evgenii Chaikin, Joop Schaye, Matthieu Schaller +7
We investigate the evolution of the galaxy stellar mass function (GSMF) and star formation rates (SFRs) across cosmic time in the COLIBRE simulations of galaxy formation. COLIBRE i…
COLIBRE: calibrating subgrid feedback in cosmological simulations that include a cold gas phase
Evgenii Chaikin, Joop Schaye, Matthieu Schaller +17
We present the calibration of stellar and active galactic nucleus (AGN) feedback in the subgrid model for the new COLIBRE hydrodynamical simulations of galaxy formation. COLIBRE di…
The COLIBRE project: cosmological hydrodynamical simulations of galaxy formation and evolution
Joop Schaye, Evgenii Chaikin, Matthieu Schaller +18
We present the COLIBRE galaxy formation model and the COLIBRE suite of cosmological hydrodynamical simulations. COLIBRE includes new models for radiative cooling, dust grains, star…
Not so dark, not so dense: an alternative explanation for the lensing subhalo in SDSSJ0946+1006
Qiuhan He, Andrew Robertson, James W. Nightingale +12
Previous studies of the strong lens system SDSSJ0946+1006 have reported a dark matter subhalo with an unusually high central density, potentially challenging the standard cold dark…
The Manticore Project I: a digital twin of our cosmic neighbourhood from Bayesian field-level analysis
Stuart McAlpine, Jens Jasche, Metin Ata +4
We present the first results from the Manticore project, dubbed Manticore-Local, a suite of Bayesian constrained simulations of the nearby Universe, generated by fitting a physical…
Dynamical analysis of stacked samples of asymmetric, non-static, self-gravitating systems
Yan-Chuan Cai, Nick Kaiser, Shaun Cole +1
We use numerical simulations to explore biases that arise in dynamical estimates of the mean mass profile for a collection of galaxy clusters that have been stacked to make a compo…
Probing Dark Matter Substructures with Free-Form Modelling: A Case Study of the `Jackpot' Strong Lens
Xiaoyue Cao, Ran Li, James W. Nightingale +12
Characterising the population and internal structure of sub-galactic halos is critical for constraining the nature of dark matter. These halos can be detected near galaxies that ac…
The "Little Dark Dot": Evidence for Self-interacting Dark Matter in the Strong Lens SDSS J0946+1006?
Shubo Li, Ran Li, Kaihao Wang +13
Previous studies, based on precise modeling of a gravitationally lensing image, have identified what may be an extremely compact, dark perturber in the well-known lensing system SD…
PAC in DESI. I. Galaxy Stellar Mass Function into the Frontier
Kun Xu, Y. P. Jing, Shaun Cole +34
The Photometric Objects Around Cosmic Webs (PAC) method integrates cosmological photometric and spectroscopic surveys, offering valuable insights into galaxy formation. PAC measure…
The Emperor's New Arc: gigaparsec patterns abound in a CDM universe
Till Sawala, Meri Teeriaho, Carlos S. Frenk +5
Recent discoveries of apparent large-scale features in the structure of the universe, extending over many hundreds of megaparsecs, have been claimed to contradict the large-scale i…
Measuring the Stellar-to-Halo Mass Relation at Solar masses, using forthcoming space-based imaging of galaxy-galaxy strong lenses
Kaihao Wang, Xiaoyue Cao, Ran Li +11
The stellar-to-halo mass relation (SHMR) is central to understanding the co-evolution of galaxies and their host dark matter haloes, yet it remains weakly constrained for dwarf gal…
Simulations of the accreted stellar halos of low-mass field galaxies
Andrew P. Cooper, Carlos S. Frenk, Wojciech A. Hellwing +1
We predict the properties of stellar halos in galaxies of present-day virial mass by combining the GALFORM semi-analytic model of galaxy fo…