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Constraining cosmological simulations with peculiar velocities: a forward-modeling approach
Aurélien Valade, Noam Libeskind, Daniel Pomarède +4
Numerical simulations are a key tool to decipher the dynamics of gravitation. Yet, they fail to spatially reproduce the Universe we observe, limiting comparison between observation…
A continuous parameterization of the cosmic web
C. Yamila Yaryura, Mario G. Abadi, Noam I. Libeskind +3
The intrinsic properties of galaxies are influenced by their environments, underscoring the environment's critical role in galaxy formation and evolution. Traditionally, these envi…
The Thermal Sunyaev-Zel'dovich Effect from the Epoch of Reionization
Ilian T. Iliev, Azizah R. Hosein, Jens Chluba +11
The thermal Sunyaev-Zel'dovich (tSZ) effect arises from inverse Compton scattering of low energy photons onto thermal electrons, proportional to the integrated electron pressure, a…
A Machine Learning Approach to Correct for Mass Resolution Effects in Simulated Halo Clustering Statistics
Daniel Forero-Sánchez, Chia-Hsun Chuang, Sergio Rodríguez-Torres +3
The increase in the observed volume in cosmological surveys imposes various challenges on simulation preparations. Firstly, the volume of the simulations required increases proport…
The short ionizing photon mean free path at z=6 in Cosmic Dawn III, a new fully-coupled radiation-hydrodynamical simulation of the Epoch of Reionization
Joseph S. W. Lewis, Pierre Ocvirk, Jenny G. Sorce +13
Recent determinations of the mean free path of ionising photons (mfp) in the intergalactic medium (IGM) at are lower than many theoretical predictions. To gain insight in…
A robust determination of halo environment in the cosmic field
Peng Wang, Xi Kang, Noam I. Libeskind +3
A number of methods for studying the large-scale cosmic matter distribution exist in the literature. One particularly common method employed to define the cosmic web is to examine…
The Past History of Galaxy Clusters told by their present neighbors
Jenny G. Sorce, Stefan Gottlöber, Gustavo Yepes
Galaxy clusters can play a key role in modern cosmology provided their evolution is properly understood. However, observed clusters give us only a single timeframe of their dynamic…
Suppression of Star Formation in Low-Mass Galaxies Caused by the Reionization of their Local Neighborhood
Taha Dawoodbhoy, Paul R. Shapiro, Pierre Ocvirk +10
Photoheating associated with reionization suppressed star formation in low-mass galaxies. Reionization was inhomogeneous, however, affecting different regions at different times. T…
Simulations of ultra-high Energy Cosmic Rays in the local Universe and the origin of Cosmic Magnetic Fields
Stefan Hackstein, Franco Vazza, Marcus Brüggen +2
We simulate the propagation of cosmic rays at ultra-high energies, eV, in models of extragalactic magnetic fields in constrained simulations of the local Universe…
Universal subhalo accretion in cold and warm dark matter cosmologies
Bogna Kubik, Noam I. Libeskind, Alexander Knebe +4
The influence of the large scale structure on host halos may be studied by examining the angular infall pattern of subhalos. In particular, since warm and cold dark matter cosmolog…
On the shape of dark matter halos from MultiDark Planck simulations
Jesús Vega-Ferrero, Gustavo Yepes, Stefan Gottlöber
The halo shape plays a central role in determining important observational properties of the haloes such as mass, concentration and lensing cross-sections. The triaxiality of lensi…
The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Modeling the clustering and halo occupation distribution of BOSS-CMASS galaxies in the Final Data Release
Sergio A. Rodríguez-Torres, Chia-Hsun Chuang, Francisco Prada +21
We present a study of the clustering and halo occupation distribution of BOSS CMASS galaxies in the redshift range 0.43 < z < 0.7 drawn from the Final SDSS-III Data Release. We com…
nIFTy Cosmology: Galaxy/halo mock catalogue comparison project on clustering statistics
Chia-Hsun Chuang, Cheng Zhao, Francisco Prada +21
We present a comparison of major methodologies of fast generating mock halo or galaxy catalogues. The comparison is done for two-point and the three-point clustering statistics. Th…
Hunting down systematics in baryon acoustic oscillations after cosmic high noon
Francisco Prada, Claudia G. Scoccola, Chia-Hsun Chuang +5
Future dark energy experiments will require better and more accurate theoretical predictions for the baryonic acoustic oscillations (BAO) signature in the spectrum of cosmological…
MultiDark simulations: the story of dark matter halo concentrations and density profiles
Anatoly Klypin, Gustavo Yepes, Stefan Gottlober +2
Accurately predicting structural properties of dark matter halos is one of the fundamental goals of modern cosmology. We use the new suite of MultiDark cosmological simulations to…
The MUSIC of Galaxy Clusters II: X-ray global properties and scaling relations
Veronica Biffi, Federico Sembolini, Marco De Petris +3
We present the X-ray properties and scaling relations of a large sample of clusters extracted from the Marenostrum MUltidark SImulations of galaxy Clusters (MUSIC) dataset. We focu…
The velocity shear tensor: tracer of halo alignment
Noam I. Libeskind, Yehuda Hoffman, Jaime Forero-Romero +4
The alignment of DM halos and the surrounding large scale structure (LSS) is examined in the context of the cosmic web. Halo spin, shape and the orbital angular momentum of subhalo…
Estimating cosmic velocity fields from density fields and tidal tensors
Francisco-Shu Kitaura, Raul E. Angulo, Yehuda Hoffman +1
In this work we investigate the nonlinear and nonlocal relation between cosmological density and peculiar velocity fields. Our goal is to provide an algorithm for the recon- struct…
The Redshift Evolution of LCDM Halo Parameters
J. C. Muñoz-Cuartas, Andrea V. Macciò, Stefan Gottlöber +1
We study the mass and redshift dependence of the concentration parameter in Nbody simulations spanning masses from $10^{10} \hMsun$ to $10^{15} \hMsun$ and redshifts from 0 to 2. W…
The Large Scale Bias of Dark Matter Halos: Numerical Calibration and Model Tests
Jeremy L. Tinker, Brant E. Robertson, Andrey V. Kravtsov +4
We measure the clustering of dark matter halos in a large set of collisionless cosmological simulations of the flat LCDM cosmology. Halos are identified using the spherical overden…
The Sunyaev-Zeldovich effect in superclusters of galaxies using gasdynamical simulations: the case of Corona Borealis
I. Flores-Cacho, J. A. Rubiño-Martín, G. Luzzi +8
[Abridged] We study the thermal and kinetic Sunyaev-Zel'dovich (SZ) effect associated with superclusters of galaxies using the MareNostrum Universe SPH simulation. We consider supe…