Publications (43)
Extreme value statistics of smooth random Gaussian fields
S. Colombi, O. Davis, J. Devriendt +2
We consider the Gumbel or extreme value statistics describing the distribution function p_G(x_max) of the maximum values of a random field x within patches of fixed size. We presen…
MoLUSC: A MOck Local Universe Survey Constructor
T. Sousbie, H. Courtois, G. Bryan +1
This paper presents MoLUSC, a new method for generating mock galaxy catalogs from a large scale ( Mpc) dark matter simulation, that requires only modest CPU tim…
Star formation losses due to tidal debris in `hierarchical' galaxy formation
B. F. Roukema, S. Ninin, J. Devriendt +3
Bottom-up hierarchical formation of dark matter haloes is not as monotonic as implicitly assumed in the Press-Schechter formalism: matter can be ejected into tidal tails, shells or…
Probing unexplored territories with MUSE: a second generation instrument for the VLT
R. Bacon, S. Bauer, P. Boehm +57
The Multi Unit Spectroscopic Explorer (MUSE) is a second-generation VLT panoramic integral-field spectrograph under preliminary design study. MUSE has a field of 1x1 arcmin**2 samp…
Group connectivity in COSMOS: a tracer of mass assembly history
E. Darragh-Ford, C. Laigle, G. Gozaliasl +11
Cosmic filaments are the channel through which galaxy groups assemble their mass. Cosmic connectivity, namely the number of filaments connected to a given group, is therefore expec…
Total density profile of massive early-type galaxies in Horizon-AGN simulation: impact of AGN feedback and comparison with observations
S. Peirani, A. Sonnenfeld, R. Gavazzi +6
Using the two large cosmological hydrodynamical simulations, Horizon-AGN (H-AGN) and Horizon-noAGN (H-noAGN, no AGN feedback), we investigate how a typical sub-grid model for AGN f…
The SAMI Galaxy Survey: First detection of a transition in spin orientation with respect to cosmic filaments in the stellar kinematics of galaxies
C. Welker, J. Bland-Hawthorn, J. Van de Sande +16
We present the first detection of mass dependent galactic spin alignments with local cosmic filaments with over 2 sigma confidence using IFS kinematics. The 3D network of cosmic fi…
New tools for studying planarity in galaxy satellite systems: Milky Way satellite planes are consistent with ÎCDM
E. Uzeirbegovic, G. Martin, S. Kaviraj +8
We introduce a new concept -- termed "planarity" -- which aims to quantify planar structure in galaxy satellite systems without recourse to the number or thickness of planes. We us…
Population statistics of intermediate mass black holes in dwarf galaxies using the NewHorizon simulation
R. S. Beckmann, Y. Dubois, M. Volonteri +6
While it is well established that supermassive black holes (SMBHs) co-evolve with their host galaxy, it is currently less clear how lower mass black holes, so-called intermediate m…
Horizon-AGN virtual observatory - 1. SED-fitting performance and forecasts for future imaging surveys
C. Laigle, I. Davidzon, O. Ilbert +13
Using the ligthcone from the cosmological hydrodynamical simulation Horizon-AGN, we produced a photometric catalogue over with apparent magnitudes in COSMOS, DES, LSST-like…
Influence of AGN jets on the magnetized ICM
Y. Dubois, J. Devriendt, A. Slyz +1
Galaxy clusters are the largest structures for which there is observational evidence of a magnetised medium. Central cores seem to host strong magnetic fields ranging from a few 0.…
The Impact of Galaxy Formation on the Diffuse Background Radiation
J. Silk, J. Devriendt
The far infrared background is a sink for the hidden aspects of galaxy formation. At optical wavelengths, ellipticals and spheroids are old, even at Neither the luminou…
The FIR/submm window on galaxy formation
B. Guiderdoni, F. R. Bouchet, J. Devriendt +2
Our view on the deep universe has been so far biased towards optically bright galaxies. Now, the measurement of the Cosmic Infrared Background in FIRAS and DIRBE residuals, and the…
Density profile of dark matter haloes and galaxies in the Horizon-AGN simulation: the impact of AGN feedback
S. Peirani, Y. Dubois, M. Volonteri +7
Using a suite of three large cosmological hydrodynamical simulations, Horizon-AGN, Horizon-noAGN (no AGN feedback) and Horizon-DM (no baryons), we investigate how a typical sub-gri…
The dusty, albeit ultraviolet bright infancy of galaxies
J. Devriendt, C. Rimes, C. Pichon +11
The largest galaxies acquire their mass early on, when the Universe is still youthful. Cold streams violently feed these young galaxies a vast amount of fresh gas, resulting in ver…
Towards simulating star formation in the interstellar medium
A. Slyz, J. Devriendt, Greg Bryan +1
As a first step to a more complete understanding of the local physical processes which determine star formation rates (SFRs) in the interstellar medium (ISM), we have performed con…
Forming stars on a viscous timescale: the key to exponential stellar profiles in disk galaxies?
A. Slyz, J. Devriendt, J. Silk +1
We argue for implementing star formation on a viscous timescale in hydrodynamical simulations of disk galaxy formation and evolution. Modelling two-dimensional isolated disk galaxi…
On unveiling Buried Nuclei with JWST: a technique for hunting the most obscured galaxy nuclei from local to high redshift
I. GarcÃa-Bernete, F. R. Donnan, D. Rigopoulou +12
We analyze JWST NIRSpec+MIRI/MRS observations of the infrared (IR) Polycyclic Aromatic Hydrocarbon (PAH) features in the central regions (0.26'' at 6 micron; 50-440 pc…
WIMP matter power spectra and small scale power generation
C. Boehm, H. Mathis, J. Devriendt +1
Dark Matter (DM) is generally assumed to be massive, cold and collisionless from the structure formation point of view. A more correct statement however is that DM indeed experienc…
The NewHorizon Simulation -- To Bar Or Not To Bar
J. Reddish, K. Kraljic, M. S. Petersen +12
We use the NewHorizon simulation to study the redshift evolution of bar properties and fractions within galaxies in the stellar masses range $M_{\star} = 10^{7.25} - 10^{11.4} \ \r…
Reionization history constraints from neural network based predictions of high-redshift quasar continua
D. ÄurovÄÃková, H. Katz, S. E. I. Bosman +3
Observations of the early Universe suggest that reionization was complete by , however, the exact history of this process is still unknown. One method for measuring the evo…
Simulated stellar kinematics studies of high-redshift galaxies with the HARMONI Integral Field Spectrograph
S. Kendrew, S. Zieleniewski, R. C. W. Houghton +6
We present a study into the capabilities of integrated and spatially resolved integral field spectroscopy of galaxies at z=2-4 with the future HARMONI spectrograph for the European…
LyMAS reloaded: improving the predictions of the large-scale Lyman-α forest statistics from dark matter density and velocity fields
S. Peirani, S. Prunet, S. Colombi +6
We present LyMAS2, an improved version of the "Lyman-α Mass Association Scheme" aiming at predicting the large-scale 3d clustering statistics of the Lyman-α forest (Ly-α) from m…
Weak lensing in the Horizon-AGN simulation lightcone. Small scale baryonic effects
C. Gouin, R. Gavazzi, C. Pichon +6
Context. Accurate model predictions including the physics of baryons are required to make the most of the upcoming large cosmological surveys devoted to gravitational lensing. The…
Building Merger Trees from Cosmological N-body Simulations
D. Tweed, J. Devriendt, J. Blaizot +2
Although a fair amount of work has been devoted to growing Monte-Carlo merger trees which resemble those built from an N-body simulation, comparatively little effort has been inves…
The XXL Survey: I. Scientific motivations - XMM-Newton observing plan - Follow-up observations and simulation programme
M. Pierre, F. Pacaud, C. Adami +89
We present the XXL Survey, the largest XMM programme totaling some 6.9 Ms to date and involving an international consortium of roughly 100 members. The XXL Survey covers two extrag…
The XXL survey: first results and future
M. Pierre, C. Adami, M. Birkinshaw +108
The XXL survey currently covers two 25 sq. deg. patches with XMM observations of ~10ks. We summarise the scientific results associated with the first release of the XXL data set, t…
Modelling the Galaxy Bimodality: Shutdown Above a Critical Halo Mass
A. Cattaneo, A. Dekel, J. Devriendt +2
We reproduce the blue and red sequences in the observed joint distribution of colour and magnitude for galaxies at low and high redshifts using hybrid N-body/semi-analytic simulati…
Evidence for non-merger co-evolution of galaxies and their supermassive black holes
R. J. Smethurst, R. S. Beckmann, B. D. Simmons +7
Recent observational and theoretical studies have suggested that supermassive black holes (SMBHs) grow mostly through non-merger (`secular') processes. Since galaxy mergers lead to…
Rigging dark halos: why is hierarchical galaxy formation consistent with the inside-out build-up of thin discs?
C. Pichon, D. Pogosyan, T. Kimm +3
State-of-the-art hydrodynamical simulations show that gas inflow through the virial sphere of dark matter halos is focused (i.e. has a preferred inflow direction), consistent (i.e.…
On the filamentary environment of galaxies
C. Gay, C. Pichon, D. Le Borgne +3
The correlation between the large-scale distribution of galaxies and their spectroscopic properties at z=1.5 is investigated using the Horizon MareNostrum cosmological run. We have…
Kinematic unrest of low mass galaxy groups
G. Gozaliasl, A. Finoguenov, H. G. Khosroshahi +6
In an effort to better understand the formation of galaxy groups, we examine the kinematics of a large sample of spectroscopically confirmed X-ray galaxy groups in the Cosmic Evolu…
The role of AGN on the structure, kinematics and evolution of ETGs in the Horizon simulations
M. S. Rosito, S. E. Pedrosa, P. B. Tissera +7
Feedback processes play a fundamental role in the regulation of the star formation (SF) activity in galaxies and, in particular, in the quenching of early-type galaxies (ETGs) as h…
GALICS -- VI. Modelling Hierarchical Galaxy Formation in Clusters
B. Lanzoni, B. Guiderdoni, G. A. Mamon +2
High-resolution N-body re-simulations of 15 massive (10^{14}-10^{15} Msun) dark matter haloes have been combined with the hybrid galaxy formation model GalICS (Hatton et al. 2003),…
Cosmological simulations of the same spiral galaxy: satellite properties, the role of baryonic physics and star formation history in shaping dark matter cores/cusps
A. Nuñez-Castiñeyra, E. Nezri, P. Mollitor +3
We investigate the role of baryonic physics in shaping the population, structure, and internal dynamics of galactic subhalos using the Mochima suite of cosmological zoom-in simulat…
Active Galactic Nuclei In Cosmological Simulations - I. Formation of black holes and spheroids through mergers
A. Cattaneo, J. Blaizot, J. Devriendt +1
The Active Galactic Nuclei In Cosmological Simulations (AGNICS) project includes AGN into the GalICS hybrid (N-body + semi-analytic) model to explore the quasar-galaxy link in a co…
Cosmological simulations of the same spiral galaxy: connecting the dark matter distribution of the host halo with the subgrid baryonic physics
A. Núñez-Castiñeyra, E. Nezri, P. Mollitor +2
The role of baryonic physics, star formation, and stellar feedback, in shaping the galaxies and their host halos is an evolving topic. The dark matter aspects are illustrated in th…
Galaxy evolution in the metric of the Cosmic Web
K. Kraljic, S. Arnouts, C. Pichon +19
The role of the cosmic web in shaping galaxy properties is investigated in the GAMA spectroscopic survey in the redshift range . The stellar mass, du…
Cosmic evolution of stellar quenching by AGN feedback: clues from the Horizon-AGN simulation
R. S. Beckmann, J. Devriendt, A. Slyz +8
The observed massive end of the galaxy stellar mass function is steeper than its predicted dark matter halo counterpart in the standard CDM paradigm. In this paper, we investig…
Galaxies flowing in the oriented saddle frame of the cosmic web
K. Kraljic, C. Pichon, Y. Dubois +12
The strikingly anisotropic large-scale distribution of matter made of an extended network of voids delimited by sheets, themselves segmented by filaments, within which matter flows…
Galaxy merger histories and the role of merging in driving star formation at z>1
S. Kaviraj, J. Devriendt, Y. Dubois +5
We use Horizon-AGN, a hydrodynamical cosmological simulation, to explore the role of mergers in the evolution of massive (M > 10^10 MSun) galaxies around the epoch of peak cosmic s…
Galaxy orientation with the cosmic web across cosmic time
S. Codis, A. Jindal, N. E. Chisari +4
This work investigates the alignment of galactic spins with the cosmic web across cosmic time using the cosmological hydrodynamical simulation Horizon-AGN. The cosmic web structure…
Cosmic reflections I: the structural diversity of simulated and observed low-mass galaxy analogues
G. Martin, A. E. Watkins, Y. Dubois +10
Dwarf galaxies serve as powerful laboratories for investigating the underlying physics of galaxy evolution including the impact of baryonic feedback processes and environmental inf…