Publications (151)
MgII in the JWST Era: a Probe of Lyman Continuum Escape?
Harley Katz, Thibault Garel, Joakim Rosdahl +7
Limited constraints on the evolution of the Lyman Continuum (LyC) escape fraction represent one of the primary uncertainties in the theoretical determination of the reionization hi…
Universality of the halo mass function in screened gravity theories
Francesca von Braun-Bates, Julien Devriendt
We examine the efficacy of the halo mass function as a probe of , symmetron and DGP gravity. We develop an excursion-set method to generalise a range of popular HMF fitting f…
The Radius of Baryonic Collapse in Disc Galaxy Formation
Susan A. Kassin, Julien Devriendt, S. Michael Fall +3
In the standard picture of disc galaxy formation, baryons and dark matter receive the same tidal torques, and therefore approximately the same initial specific angular momentum. Ho…
Most massive halos with Gumbel Statistics
Olaf Davis, Julien Devriendt, Stéphane Colombi +2
We present an analytical calculation of the extreme value statistics for dark matter halos - that is, the probability distribution of the most massive halo within some region of th…
The impact of AGN feedback on galaxy intrinsic alignments in the Horizon simulations
Adam Soussana, Nora Elisa Chisari, Sandrine Codis +7
The intrinsic correlations of galaxy shapes and orientations across the large-scale structure of the Universe are a known contaminant to weak gravitational lensing. They are known…
On the Observed Diversity of Star Formation Efficiencies in Giant Molecular Clouds
Kearn Grisdale, Oscar Agertz, Florent Renaud +3
Observations find a median star formation efficiency per free-fall time in Milky Way Giant Molecular Clouds (GMCs) on the order of with dispersions of $\sim0.…
The Velocity Field Olympics: Assessing velocity field reconstructions with direct distance tracers
Richard Stiskalek, Harry Desmond, Julien Devriendt +5
The peculiar velocity field of the local Universe provides direct insights into its matter distribution and the underlying theory of gravity, and is essential in cosmological analy…
Evaluating the variance of individual halo properties in constrained cosmological simulations
Richard Stiskalek, Harry Desmond, Julien Devriendt +1
Constrained cosmological simulations play an important role in modelling the local Universe, enabling investigation of the dark matter content of local structures and their formati…
Hierarchical models of high redshift galaxies with thermally pulsing asymptotic giant branch stars: comparison with observations
Chiara Tonini, Claudia Maraston, Daniel Thomas +2
In a recent paper we presented the first semi-analytic model of galaxy formation in which the Thermally-Pulsing Asymptotic Giant Branch phase of stellar evolution has been fully im…
Impact of Radiation Feedback on the Formation of Globular Cluster Candidates during Cloud-Cloud Collisions
Daniel Han, Taysun Kimm, Harley Katz +2
To understand the impact of radiation feedback during the formation of a globular cluster (GC), we simulate a head-on collision of two turbulent giant molecular clouds (GMCs). A se…
GalICS 2.1: a new semianalytic model for cold accretion, cooling, feedback and their roles in galaxy formation
Andrea Cattaneo, Ioanna Koutsouridou, Edouard Tollet +2
Dekel & Birnboim06 proposed that the mass-scale that separates late-type and early-type galaxies is linked to the critical halo mass for the propagation of a stable shock and showe…
How to Quench a Dwarf Galaxy: The Impact of Inhomogeneous Reionization on Dwarf Galaxies and Cosmic Filaments
Harley Katz, Marius Ramsoy, Joakim Rosdahl +8
We use the SPHINX suite of high-resolution cosmological radiation hydrodynamics simulations to study how spatially and temporally inhomogeneous reionization impacts the baryonic co…
Why do galactic spins flip in the cosmic web? A Theory of Tidal Torques near saddles
Christophe Pichon, Sandrine Codis, Dmitry Pogosyan +3
Filaments of the cosmic web drive spin acquisition of disc galaxies. The point process of filament-type saddle represent best this environment and can be used to revisit the Tidal…
Intrinsic alignments of galaxies in the Horizon-AGN cosmological hydrodynamical simulation
Nora Elisa Chisari, Sandrine Codis, Clotilde Laigle +7
The intrinsic alignments of galaxies are recognised as a contaminant to weak gravitational lensing measurements. In this work, we study the alignment of galaxy shapes and spins at…
Emergence and cosmic evolution of the Kennicutt-Schmidt relation driven by interstellar turbulence
Katarina Kraljic, Florent Renaud, Yohan Dubois +12
The scaling relations between the gas content and star formation rate of galaxies provide useful insights into processes governing their formation and evolution. We investigate the…
Redshift and luminosity evolution of the intrinsic alignments of galaxies in Horizon-AGN
Nora Elisa Chisari, Clotilde Laigle, Sandrine Codis +7
Intrinsic galaxy shape and angular momentum alignments can arise in cosmological large-scale structure due to tidal interactions or galaxy formation processes. Cosmological hydrody…
Caught in the rhythm: how satellites settle into a plane around their central galaxy
Charlotte Welker, Yohan Dubois, Christophe Pichon +2
Using the cosmological hydrodynamics simulation Horizon-AGN, we investigate the spatial distribution of satellite galaxies relative to their central counterpart in the redshift ran…
Impact of Cosmic Ray-driven Outflows on Lyman- Emission in Cosmological Simulations
Taysun Kimm, Julien Devriendt, Francesco Rodriguez Montero +5
Cosmic ray (CR) feedback has been proposed as a powerful mechanism for driving warm gas outflows in galaxies. We use cosmological magnetohydrodynamic simulations to investigate the…
The Challenges of Identifying Population III Stars in the Early Universe
Harley Katz, Taysun Kimm, Richard S. Ellis +2
The recent launch of JWST has enabled the exciting prospect of detecting the first generation of metal-free, Population III (Pop. III) stars. Determining the emission line signatur…
How the cosmic web induces intrinsic alignments of galaxies
Sandrine Codis, Yohan Dubois, Christophe Pichon +2
Intrinsic alignments are believed to be a major source of systematics for future generation of weak gravitational lensing surveys like Euclid or LSST. Direct measurements of the al…
Redshift and stellar mass dependence of intrinsic shapes of disc-dominated galaxies from COSMOS observations below
Kai Hoffmann, Clotilde Laigle, Nora Elisa Chisari +4
The high abundance of disc galaxies without a large central bulge challenges predictions of current hydrodynamic simulations of galaxy formation. We aim to shed light on the format…
Non-Standard Structure Formation Scenarios
Alexander Knebe, Brett Little, Ranty Islam +3
Observations on galactic scales seem to be in contradiction with recent high resolution N-body simulations. This so-called cold dark matter (CDM) crisis has been addressed in sever…
Magnetogenesis at Cosmic Dawn: Tracing the Origins of Cosmic Magnetic Fields
Harley Katz, Sergio Martin-Alvarez, Julien Devriendt +2
Despite their ubiquity, the origin of cosmic magnetic fields remains unknown. Various mechanisms have been proposed for their existence including primordial fields generated by inf…
Accretion, feedback and galaxy bimodality: a comparison of the GalICS semi-analytic model and cosmological SPH simulations
Andrea Cattaneo, Jeremy Blaizot, David H. Weinberg +6
We compare the galaxy population of an SPH simulation to those predicted by the GalICS semi-analytic model and a stripped down version without supernova and AGN feedback. The SPH s…
Cosmic evolution of black hole-spin and galaxy orientations: clues from the NewHorizon and Galactica simulations
Sebastien Peirani, Yasushi Suto, Ricarda S. Beckmann +10
(Reduced) Using the recent cosmological high-resolution zoom-in simulations, NewHorizon and Galactica, in which the evolution of black hole spin is followed on the fly, we have tra…
Mergers drive spin swings along the cosmic web
Charlotte Welker, Julien Devriendt, Yohan Dubois +2
The close relationship between mergers and the reorientation of the spin for galaxies and their host dark haloes is investigated using a cosmological hydrodynamical simulation (Hor…
Connecting the cosmic web to the spin of dark halos: implications for galaxy formation
Sandrine Codis, Christophe Pichon, Julien Devriendt +4
We investigate the alignment of the spin of dark matter halos relative (i) to the surrounding large-scale filamentary structure, and (ii) to the tidal tensor eigenvectors using the…
Exploring the origin of thick disks using the NewHorizon and Galactica simulations
Minjung J. Park, Sukyoung K. Yi, Sebastien Peirani +8
Ever since a thick disk was proposed to explain the vertical distribution of the Milky Way disk stars, its origin has been a recurrent question. We aim to answer this question by i…
PRISM: A Non-Equilibrium, Multiphase Interstellar Medium Model for Radiation Hydrodynamics Simulations of Galaxies
Harley Katz, Shenghua Liu, Taysun Kimm +7
We introduce the PRISM interstellar medium (ISM) model for thermochemistry and its implementation in the RAMSES-RTZ code. The model includes a non-equilibrium primordial, metal, an…
The Obelisk simulation: galaxies contribute more than AGN to HI reionization of protoclusters
Maxime Trebitsch, Yohan Dubois, Marta Volonteri +9
We present the Obelisk project, a cosmological radiation-hydrodynamics simulation following the assembly and reionization of a protocluster progenitor during the first two billions…
The effect of local universe constraints on halo abundance and clustering
Maxwell L. Hutt, Harry Desmond, Julien Devriendt +1
Cosmological -body simulations of the dark matter component of the universe typically use initial conditions with a fixed power spectrum and random phases of the density field,…
Jet-regulated cooling catastrophe
Yohan Dubois, Julien Devriendt, Adrianne Slyz +1
We present the first implementation of Active Galactic Nuclei (AGN) feedback in the form of momentum driven jets in an Adaptive Mesh Refinement (AMR) cosmological resimulation of a…
A Detailed Study of Feedback from a Massive Star
Sam Geen, Joakim Rosdahl, Jeremy Blaizot +2
We present numerical simulations of a 15 solar mass star in a suite of idealised environments in order to quantify the amount of energy transmitted to the interstellar medium (ISM)…
Star Formation in Viscous Galaxy Disks
Adrianne Slyz, Julien Devriendt, Andreas Burkert +2
The Lin and Pringle model (1987) of galactic disk formation postulates that if star formation proceeds on the same timescale as the viscous redistribution of mass and angular momen…
Zooming in on supermassive black holes: how resolving their gas cloud host renders their accretion episodic
Ricarda S. Beckmann, Julien Devriendt, Adrianne Slyz
Born in rapidly evolving mini-halos during the first billion years of the Universe, super- massive black holes (SMBH) feed from gas flows spanning many orders of magnitude, from th…
Towards convergence of turbulent dynamo amplification in cosmological simulations of galaxies
Sergio Martin-Alvarez, Julien Devriendt, Adrianne Slyz +3
Our understanding of the process through which magnetic fields reached their observed strengths in present-day galaxies remains incomplete. One of the advocated solutions is a turb…
COSMOS2015 photometric redshifts probe the impact of filaments on galaxy properties
Clotilde Laigle, Christophe Pichon, Stephane Arnouts +12
The variations of galaxy stellar masses and colour-types with the distance to projected cosmic filaments are quantified using the precise photometric redshifts of the COSMOS2015 ca…
The Emergence and Ionizing Feedback of Pop III.1 Stars as Progenitors for Supermassive Black Holes
Mahsa Sanati, Jonathan C. Tan, Julien Devriendt +9
Recent observations by JWST reveal an unexpectedly abundant population of rapidly growing supermassive black holes (SMBHs) in the early Universe, underscoring the need for improved…
Feeding compact bulges and supermassive black holes with low angular-momentum cosmic gas at high redshift
Yohan Dubois, Christophe Pichon, Martin Haehnelt +4
We use cosmological hydrodynamical simulations to show that a significant fraction of the gas in high redshift rare massive halos falls nearly radially to their very centre on extr…
How primordial magnetic fields shrink galaxies
Sergio Martin-Alvarez, Adrianne Slyz, Julien Devriendt +1
As one of the prime contributors to the interstellar medium energy budget, magnetic fields naturally play a part in shaping the evolution of galaxies. Galactic magnetic fields can…
Star formation history and transition epoch of cluster galaxies based on the Horizon-AGN simulation
Seyoung Jeon, Sukyoung Yi, Yohan Dubois +7
Cluster galaxies exhibit substantially lower star formation rates than field galaxies today, but it is conceivable that clusters were sites of more active star formation in the ear…
Beyond halo mass: quenching galaxy mass assembly at the edge of filaments
Hyunmi Song, Clotilde Laigle, Ho Seong Hwang +6
We examine how the mass assembly of central galaxies depends on their location in the cosmic web. The HORIZON-AGN simulation is analysed at z~2 using the DISPERSE code to extract m…
Detecting the Cosmic Web: Lyα Emission from Simulated Filaments at z=3
Lydia M. Elias, Shy Genel, Amiel Sternberg +4
The standard cosmological model (CDM) predicts the existence of the cosmic web: a distribution of matter into sheets and filaments connecting massive halos. However, observatio…
MEGATRON: the impact of non-equilibrium effects and local radiation fields on the circumgalactic medium at cosmic noon
Corentin Cadiou, Harley Katz, Martin P. Rey +22
We present three cosmological radiation-hydrodynamic zoom simulations of the progenitor of a Milky Way-mass galaxy from the MEGATRON suite. The simulations combine on-the-fly radia…
New Methods for Identifying Lyman Continuum Leakers and Reionization-Epoch Analogues
Harley Katz, Dominika ÄurovÄÃková, Taysun Kimm +7
Identifying low-redshift galaxies that emit Lyman Continuum radiation (LyC leakers) is one of the primary, indirect methods of studying galaxy formation in the epoch of reionizatio…
The Origin and Evolution of the Mass-Metallicity Relation using GalICS
Jeremy Sakstein, Antonio Pipino, Julien Devriendt +1
The GalICS (Galaxies in Cosmological Simulations) semi-analytical model of hierar- chical galaxy formation is used to investigate the effects of different galactic properties, incl…
On the Significance of the Thick Disks of Disk Galaxies
Sukyoung K. Yi, J. K. Jang, Julien Devriendt +8
Thick disks are a prevalent feature observed in numerous disk galaxies including our own Milky Way. Their significance has been reported to vary widely, ranging from a few to 100%…
Towards simulating star formation in turbulent high-z galaxies with mechanical supernova feedback
Taysun Kimm, Renyue Cen, Julien Devriendt +2
Feedback from supernovae is essential to understanding the self-regulation of star formation in galaxies. However, the efficacy of the process in a cosmological context remains unc…
Unraveling the origin of magnetic fields in galaxies
Sergio Martin-Alvarez, Harley Katz, Debora Sijacki +2
Despite their ubiquity, there are many open questions regarding galactic and cosmic magnetic fields. Specifically, current observational constraints cannot rule out if magnetic fie…
Black hole evolution: II. Spinning black holes in a supernova-driven turbulent interstellar medium
Yohan Dubois, Marta Volonteri, Joseph Silk +2
Supermassive black holes (BH) accrete gas from their surroundings and coalesce with companions during galaxy mergers, and both processes change the BH mass and spin. By means of hi…
Simulating Jellyfish Galaxies: A Case Study for a Gas-Rich Dwarf Galaxy
Jaehyun Lee, Taysun Kimm, Jérémy Blaizot +5
We investigate the formation of jellyfish galaxies using radiation-hydrodynamic simulations of gas-rich dwarf galaxies with a multi-phase interstellar medium (ISM). We find that th…
Black hole mergers from dwarf to massive galaxies with the NewHorizon and Horizon-AGN simulations
Marta Volonteri, Hugo Pfister, Ricarda S. Beckman +12
Massive black hole (MBH) coalescences are powerful sources of low-frequency gravitational waves. To study these events in the cosmological context we need to trace the large-scale…
Dwarf galaxies as a probe of a primordially magnetized Universe
Mahsa Sanati, Sergio Martin-Alvarez, Jennifer Schober +3
The true nature of primordial magnetic fields (PMFs) and their role in the formation of galaxies still remains elusive. To shed light on these unknowns, we investigate their impact…
The Horizon-AGN simulation: morphological diversity of galaxies promoted by AGN feedback
Yohan Dubois, Sebastien Peirani, Christophe Pichon +4
The interplay between cosmic gas accretion on to galaxies and galaxy mergers drives the observed morphological diversity of galaxies. By comparing the state-of-the-art hydrodynamic…
The Nature of High / Galaxies in the Epoch of Reionization: Low Carbon Abundance and a Top-Heavy IMF?
Harley Katz, Joakim Rosdahl, Taysun Kimm +11
ALMA observations of galaxies have revealed abnormally high [OIII]/[CII] ratios and [CII] deficits compared to local galaxies. Num…
A three-phase amplification of the cosmic magnetic field in galaxies
Sergio Martin-Alvarez, Julien Devriendt, Adrianne Slyz +1
Arguably the main challenge of galactic magnetism studies is to explain how the interstellar medium of galaxies reaches energetic equipartition despite the extremely weak cosmic pr…
Introducing the NewHorizon simulation: Galaxy properties with resolved internal dynamics across cosmic time
Yohan Dubois, Ricarda Beckmann, Frédéric Bournaud +13
Hydrodynamical cosmological simulations are increasing their level of realism by considering more physical processes and having greater resolution or larger statistics. However, us…
Bondi or not Bondi: the impact of resolution on accretion and drag force modelling for Supermassive Black Holes
Ricarda Sylvia Beckmann, Julien Devriendt, Adrianne Slyz
Whilst in galaxy-size simulations, supermassive black holes (SMBH) are entirely handled by sub-grid algorithms, computational power now allows the accretion radius of such objects…
On the rapid growth of SMBHs in high-z galaxies: the aftermath of Population III.1 stars
Mahsa Sanati, Julien Devriendt, SergioMartin-Alvarez +2
The vast amount of energy released by active galactic nuclei (AGN) is increasingly recognized as a key driver of evolution not only in massive galaxies and clusters, but also in lo…
The impact of supernovae driven winds on stream-fed protogalaxies
Leila C. Powell, Adrianne Slyz, Julien Devriendt
SNe driven winds are widely thought to be very influential in the high-redshift Universe, shaping the properties of the circum-galactic medium, enriching the IGM with metals and dr…
MEGATRON: Disentangling Physical Processes and Observational Bias in the Multi-Phase ISM of High-Redshift Galaxies
Nicholas Choustikov, Harley Katz, Alex J. Cameron +10
Now detected out to redshifts of , the rest-frame ultraviolet and optical spectra of galaxies encode numerous physical properties of the interstellar medium (ISM). Accu…
Using Real and Simulated Measurements of the Thermal Sunyaev-Zel'dovich Effect to Constrain Models of AGN Feedback
Alexander Spacek, Mark Richardson, Evan Scannapieco +4
Energetic feedback from active galactic nuclei (AGNs) is often used in simulations to resolve several outstanding issues in galaxy formation, but its impact is still not fully unde…
Swirling around filaments: are large-scale structure vortices spinning up dark halos?
Clotilde Laigle, Christophe Pichon, Sandrine Codis +9
The kinematic analysis of dark matter and hydrodynamical simulations suggests that the vorticity in large-scale structure is mostly confined to, and predominantly aligned with thei…
Boosting galactic outflows with enhanced resolution
Martin P. Rey, Harley B. Katz, Alex J. Cameron +2
We study how better resolving the cooling length of galactic outflows affect their energetics. We perform radiative-hydrodynamical galaxy formation simulations of an isolated dwarf…
Probing Cosmic Dawn with Emission Lines: Predicting Infrared and Nebular Line Emission for ALMA and JWST
Harley Katz, Thomas P. Galligan, Taysun Kimm +7
Infrared and nebular lines provide some of our best probes of the physics regulating the properties of the interstellar medium (ISM) at high-redshift. However, interpreting the phy…
Introducing SPHINX-MHD: The Impact of Primordial Magnetic Fields on the First Galaxies, Reionization, and the Global 21cm Signal
Harley Katz, Sergio Martin-Alvarez, Joakim Rosdahl +10
We present the first results from SPHINX-MHD, a suite of cosmological radiation-magnetohydrodynamics simulations designed to study the impact of primordial magnetic fields (PMFs) o…
The SAMI Galaxy Survey: a statistical approach to an optimal classification of stellar kinematics in galaxy surveys
Jesse van de Sande, Sam P. Vaughan, Luca Cortese +22
Large galaxy samples from multi-object IFS surveys now allow for a statistical analysis of the z~0 galaxy population using resolved kinematics. However, the improvement in number s…
Star-gas misalignment in galaxies: I. The properties of galaxies from the Horizon-AGN simulation and comparisons to SAMI
Donghyeon J. Khim, Sukyoung K. Yi, Yohan Dubois +12
Recent integral field spectroscopy observations have found that about 11% of galaxies show star-gas misalignment. The misalignment possibly results from external effects such as ga…
Why do extremely massive disc galaxies exist today?
Ryan A. Jackson, Garreth Martin, Sugata Kaviraj +4
Galaxy merger histories correlate strongly with stellar mass, largely regardless of morphology. Thus, at fixed stellar mass, spheroids and discs share similar assembly histories, b…
Jellyfish Galaxies in Magnetic Fields: Insights from Numerical Simulations
Jaehyun Lee, Taysun Kimm, Jérémy Blaizot +5
Jellyfish galaxies provide direct evidence of ram pressure stripping in cluster environments. We investigate the role of magnetic fields in the formation of jellyfish galaxies with…
Rivers of Gas I.: Unveiling The Properties of High Redshift Filaments
Marius Ramsøy, Adrianne Slyz, Julien Devriendt +2
At high redshift, the cosmic web is widely expected to have a significant impact on the morphologies, dynamics and star formation rates of the galaxies embedded within it, undersco…
How AGN feedback and metal cooling shape cluster entropy profiles
Yohan Dubois, Julien Devriendt, Romain Teyssier +1
Observed clusters of galaxies essentially come in two flavors: non cool core clusters characterized by an isothermal temperature profile and a central entropy floor, and cool-core…
Star-Gas Misalignment in Galaxies: II. Origins Found from the Horizon-AGN Simulation
Donghyeon J. Khim, Sukyoung K. Yi, Christophe Pichon +5
There have been many studies aiming to reveal the origins of the star-gas misalignment found in galaxies, but there still is a lack of understanding of the contribution from each f…
Self-regulated growth of supermassive black holes by a dual jet/heating AGN feedback mechanism: methods, tests and implications for cosmological simulations
Yohan Dubois, Julien Devriendt, Adrianne Slyz +1
We develop a new sub-grid model for the growth of supermassive Black Holes (BHs) and their associated Active Galactic Nuclei (AGN) feedback in hydrodynamical cosmological simulatio…
Identifying the progenitor set of present-day early-type galaxies: a view from the standard model
Sugata Kaviraj, Julien Devriendt, Ignacio Ferreras +2
We present a comprehensive theoretical study, using a semi-analytical model within the standard LCDM framework, of the photometric properties of the progenitors of present-day earl…
How do galaxies build up their spin in the cosmic web?
charlotte Welker, Yohan Dubois, Julien Devriendt +2
Using the Horizon-AGN simulation we find a mass dependent spin orientation trend for galaxies: the spin of low-mass, rotation-dominated, blue, star-forming galaxies are preferentia…
Blowing cold flows away: the impact of early AGN activity on the formation of a brightest cluster galaxy progenitor
Yohan Dubois, Christophe Pichon, Julien Devriendt +4
Supermassive black holes (BH) are powerful sources of energy that are already in place at very early epochs of the Universe (by z=6). Using hydrodynamical simulations of the format…
Cosmological simulations of the same spiral galaxy: the impact of baryonic physics
Arturo Nuñez-Castiñeyra, Emmanuel Nezri, Julien Devriendt +1
The interplay of star formation and supernova (SN) feedback in galaxy formation is a key element for understanding galaxy evolution. Since these processes occur at small scales, it…
Translators of galaxy morphology indicators between observation and simulation
J. K. Jang, Sukyoug K. Yi, Yohan Dubois +9
Based on the recent advancements in the numerical simulations of galaxy formation, we anticipate the achievement of realistic models of galaxies in the near future. Morphology is t…
CALIMA: On-the-fly dust and PAH evolution for radiation-hydrodynamics galaxy formation simulations
Francisco RodrÃguez Montero, Yohan Dubois, Harley Katz +2
Dust grains and polycyclic aromatic hydrocarbons (PAHs) actively contribute to the thermodynamics, chemistry, and radiative state of the interstellar medium (ISM), yet most ISM mod…
High Angular Momentum Halo Gas: a Feedback and Code-Independent Prediction of LCDM
Kyle Stewart, Ariyeh Maller, Jose Oñorbe +7
We investigate angular momentum acquisition in Milky Way-sized galaxies by comparing five high resolution zoom-in simulations, each implementing identical cosmological initial cond…
The Skeleton: Connecting Large Scale Structures to Galaxy Formation
Christophe Pichon, Christophe Gay, Dmitry Pogosyan +5
We report on two quantitative, morphological estimators of the filamentary structure of the Cosmic Web, the so-called global and local skeletons. The first, based on a global study…
The angular momentum of baryons and dark matter halos revisited
Taysun Kimm, Julien Devriendt, Adrianne Slyz +3
Recent theoretical studies have shown that galaxies at high redshift are fed by cold, dense gas filaments, suggesting angular momentum transport by gas differs from that by dark ma…
Satellite Survival in Highly Resolved Milky Way Class Halos
Sam Geen, Adrianne Slyz, Julien Devriendt
Surprisingly little is known about the origin and evolution of the Milky Way's satellite galaxy companions. UV photoionisation, supernova feedback and interactions with the larger…
Caught in the rhythm II: Competitive alignments of satellites with their inner halo and central galaxy
Charlotte Welker, Chris Power, Christophe Pichon +3
The anisotropic distribution of satellites around the central galaxy of their host halo is well-documented. However the relative impact of baryons and dark matter in shaping this d…
The impact of baryons on the matter power spectrum from the Horizon-AGN cosmological hydrodynamical simulation
Nora Elisa Chisari, Mark L. A. Richardson, Julien Devriendt +7
Accurate cosmology from upcoming weak lensing surveys relies on knowledge of the total matter power spectrum at percent level at scales /Mpc, for which modelling the im…
Modeling Lyman-α Forest Cross-Correlations with LyMAS
Cassandra Lochhaas, David H. Weinberg, Sébastien Peirani +6
We use the Ly- Mass Association Scheme (LyMAS; Peirani et al. 2014) to predict cross-correlations at between dark matter halos and transmitted flux in the Ly- fores…
The impact of TP-AGB stars on hierarchical galaxy formation models
Chiara Tonini, Claudia Maraston, Julien Devriendt +2
The spectro-photometric properties of galaxies in galaxy formation models are obtained by combining the predicted history of star formation and mass accretion with the physics of s…
The hierarchical build-up of the Tully-Fisher relation
Chiara Tonini, Claudia Maraston, Bodo Ziegler +4
We use the semi-analytic model GalICS to predict the Tully-Fisher relation in the B, I and for the first time, in the K band, and its evolution with redshift, up to z~1. We refined…
Intrinsic alignment of simulated galaxies in the cosmic web: implications for weak lensing surveys
Sandrine Codis, Raphael Gavazzi, Yohan Dubois +6
The intrinsic alignment of galaxy shapes (by means of their angular momentum) and their cross-correlation with the surrounding dark matter tidal field are investigated using the 16…
Inferring the Ionizing Photon Contributions of High-Redshift Galaxies to Reionization with JWST NIRCam Photometry
Nicholas Choustikov, Richard Stiskalek, Aayush Saxena +3
JWST is providing constraints on the history of reionization owing to its ability to detect faint galaxies at . Modeling this history requires understanding both the ionizin…
Comparing Galaxy Clustering in Horizon-AGN Simulated Lightcone Mocks and VIDEO Observations
Peter Hatfield, Clotilde Laigle, Matt Jarvis +5
Hydrodynamical cosmological simulations have recently made great advances in reproducing galaxy mass assembly over cosmic time - as often quantified from the comparison of their pr…
The SAMI Galaxy Survey: comparing 3D spectroscopic observations with galaxies from cosmological hydrodynamical simulations
Jesse van de Sande, Claudia D. P. Lagos, Charlotte Welker +19
Cosmological hydrodynamical simulations are rich tools to understand the build-up of stellar mass and angular momentum in galaxies, but require some level of calibration to observa…
Bursty star formation feedback and cooling outflows
Teresita Suarez, Andrew Pontzen, Hiranya V. Peiris +2
We study how outflows of gas launched from a central galaxy undergoing repeated starbursts propagate through the circumgalactic medium (CGM), using the simulation code RAMSES. We a…
Gas flows in the circumgalactic medium around simulated high-redshift galaxies
Peter Mitchell, Jeremy Blaizot, Julien Devriendt +4
We analyse the properties of circumgalactic gas around simulated galaxies in the redshift range z >= 3, utilising a new sample of cosmological zoom simulations. These simulations a…
Galactic star formation in parsec-scale resolution simulations
Leila C. Powell, Frederic Bournaud, Damien Chapon +3
The interstellar medium (ISM) in galaxies is multiphase and cloudy, with stars forming in the very dense, cold gas found in Giant Molecular Clouds (GMCs). Simulating the evolution…
Dancing in the dark: galactic properties trace spin swings along the cosmic web
Yohan Dubois, Christophe Pichon, Charlotte Welker +30
A large-scale hydrodynamical cosmological simulation, Horizon-AGN, is used to investigate the alignment between the spin of galaxies and the cosmic filaments above redshift 1.2. Th…
On the Viability of Determining Galaxy Properties from Observations I: Star Formation Rates and Kinematics
Kearn Grisdale, Laurence Hogan, Dimitra Rigopoulou +8
We explore how observations relate to the physical properties of the emitting galaxies by post-processing a pair of merging galaxies from the cosmological, hydrodynamical…
The Physics of Indirect Estimators of Lyman Continuum Escape and their Application to High-Redshift JWST Galaxies
Nicholas Choustikov, Harley Katz, Aayush Saxena +6
Reliable indirect diagnostics of LyC photon escape from galaxies are required to understand which sources were the dominant contributors to reionization. While multiple LyC escape…
The halo mass function in the cosmic web
Francesca von Braun-Bates, Hans A. Winther, David Alonso +1
An important indicator of modified gravity is the effect of the local environment on halo properties. This paper examines the influence of the local tidal structure on the halo mas…