A5068483010- Cosmology and Gravitation Theories
- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Astrophysics and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Black Holes and Theoretical Physics
- Radio Astronomy Observations and Technology
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Adaptive optics and wavefront sensing
- Astrophysics and Star Formation Studies
- Scientific Research and Discoveries
- Relativity and Gravitational Theory
- Computational Physics and Python Applications
- Dark Matter and Cosmic Phenomena
- Plant Water Relations and Carbon Dynamics
- Remote Sensing in Agriculture
- Geophysics and Gravity Measurements
- Blind Source Separation Techniques
- Photocathodes and Microchannel Plates
- Tropical and Extratropical Cyclones Research
- Experimental and Theoretical Physics Studies
- CCD and CMOS Imaging Sensors
- Quantum, superfluid, helium dynamics
- Advanced Thermodynamics and Statistical Mechanics
Max Planck Institute for Astrophysics
2020-2025
Excellence Cluster Origins
2020-2024
Bayer (Germany)
2023-2024
Durham University
2018-2021
Indiana Cancer Consortium
2021
Universidad de Guanajuato
2012-2013
The early release science results from $\textit{JWST}$ have yielded an unexpected abundance of high-redshift luminous galaxies that seems to be in tension with current theories galaxy formation. However, it is currently difficult draw definitive conclusions form these as the sources not yet been spectroscopically confirmed. It any case important establish baseline predictions state-of-the-art formation models can compared and contrasted new measurements. In this work, we use large-volume...
Cosmological inference with large galaxy surveys requires theoretical models that combine precise predictions for large-scale structure robust and flexible formation modelling throughout a sufficiently cosmic volume. Here, we introduce the MillenniumTNG (MTNG) project which combines hydrodynamical model of IllustrisTNG volume Millennium simulation. Our largest hydrodynamic simulation, covering (500 Mpc/h)^3 = (740 Mpc)^3, is complemented by suite dark-matter-only simulations up to 4320^3...
We present constraints on the <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>f</a:mi><a:mo stretchy="false">(</a:mo><a:mi>R</a:mi><a:mo stretchy="false">)</a:mo></a:math> gravity model using a sample of 1005 galaxy clusters in redshift range 0.25–1.78 that have been selected through thermal Sunyaev-Zel’dovich effect from South Pole Telescope data and subjected to optical near-infrared confirmation with multicomponent matched filter algorithm. employ weak...
Cosmological simulations are an important theoretical pillar for understanding nonlinear structure formation in our Universe and relating it to observations on large scales. In several papers, we introduce MillenniumTNG (MTNG) project that provides a comprehensive set of high-resolution, volume cosmic aiming better understand physical processes scales help interpreting upcoming large-scale galaxy surveys. We here focus the full physics box MTNG740 computes $(740\,\mathrm{Mpc})^3$ with...
ABSTRACT We study weak gravitational lensing convergence maps produced from the MillenniumTNG simulations by direct projection of mass distribution on past backwards lightcone a fiducial observer. explore over large dynamic range in simulation and angular resolution, allowing us to establish clear assessment numerical convergence. By comparing full physics hydrodynamical with corresponding dark-matter-only runs, we quantify impact baryonic most important statistics. Likewise, predict massive...
ABSTRACT Luminous red galaxies (LRGs) and blue star-forming emission-line (ELGs) are key tracers of large-scale structure used by cosmological surveys. Theoretical predictions for such data often done via simplistic models the galaxy–halo connection. In this work, we use large, high-fidelity hydrodynamical simulation MillenniumTNG project (MTNG) to inform a new phenomenological approach obtaining an accurate flexible galaxy-halo model on small scales. Our aim is study LRGs ELGs at two...
ABSTRACT Approximate methods to populate dark-matter haloes with galaxies are of great utility galaxy surveys. However, the limitations simple halo occupation models (HODs) preclude a full use small-scale clustering data and call for more sophisticated models. We study two populations, luminous red (LRGs) star-forming emission-line (ELGs), at epochs, z = 1 0, in large-volume, high-resolution hydrodynamical simulation MillenniumTNG project. In partner we concentrated on small-scale, one-halo...
We present a study of the evolution cosmic filaments across redshift with an emphasis on some important properties: filament lengths, growth rates, and radial profiles galaxy densities. Following observation-driven approach, we built catalogues at z = 0, 1, 2, 3, 4 from distributions large hydro-dynamical run MilleniumTNG project. employed extensively used DisPerSE web finder code, for which provide user-friendly guide, including details physics-driven calibration procedure, hope helping...
Abstract Shortly after its discovery, General Relativity (GR) was applied to predict the behavior of our Universe on largest scales, and later became foundation modern cosmology. Its validity has been verified a range scales environments from Solar system merging black holes. However, experimental confirmations GR cosmological have so far lacked accuracy one would hope for — applications those being largely based extrapolation there sometimes questioned in shadow discovery unexpected cosmic...
Abstract We present mg-glam , a code developed for the very fast production of full N-body cosmological simulations in modified gravity (MG) models. describe implementation, numerical tests and first results large suite three classes MG models with conformal coupling terms: f ( R ) gravity, symmetron coupled quintessence Derived from parallel particle-mesh glam incorporates an efficient multigrid relaxation technique to solve characteristic nonlinear partial differential equations these For...
Abstract The measurement of the absolute neutrino mass scale from cosmological large-scale clustering data is one key science goals Euclid mission. Such a relies on precise modelling impact neutrinos structure formation, which can be studied with N -body simulations. Here we present results major code comparison effort to establish maturity and reliability numerical methods for treating massive neutrinos. includes eleven full implementations (not all them independent), two schemes...
We introduce a novel technique for constraining cosmological parameters and galaxy assembly bias using non-linear redshift-space clustering of galaxies. scale N-body simulations insert galaxies with the SubHalo Abundance Matching extended (SHAMe) empirical model to generate over 175,000 measurements spanning all relevant SHAMe parameter values. then build an emulator capable reproducing projected correlation function at monopole, quadrupole hexadecapole level separations between...
ABSTRACT We carry out ‘full-physics’ hydrodynamical simulations of galaxy formation in the normal-branch Dvali–Gabadadze–Porrati (nDGP) braneworld model using a new modified version arepo code and IllustrisTNG model. simulate two nDGP models (N5 N1) that represent, respectively, weak moderate departures from general relativity (GR), boxes sizes $62$ $25\, h^{-1}{\rm Mpc}$ 2 × 5123 dark matter particles initial gas cells. This allows us to explore, for first time, impact baryonic physics on...
Abstract We present mg-glam , a code developed for the very fast production of full N -body cosmological simulations in modified gravity (MG) models. describe implementation, numerical tests and first results large suite two broad classes MG models with derivative coupling terms — Vainshtein - Kmouflage -type which respectively features screening mechanism. Derived from parallel particle-mesh glam incorporates an efficient multigrid relaxation technique to solve characteristic nonlinear...
Analysis of large galaxy surveys requires confidence in the robustness numerical simulation methods. The simulations are used to construct mock catalogs validate data analysis pipelines and identify potential systematics. We compare three $N$-body codes, ABACUS, GADGET, SWIFT, investigate regimes which their results agree. run at different mass resolutions, $6.25\times10^{8}$, $2.11\times10^{9}$, $5.00\times10^{9}~h^{-1}$M$_{\odot}$, matching phases reduce noise within comparisons. find...
Modern redshift surveys are tasked with mapping out the galaxy distribution over enormous distance scales. Existing hydrodynamical simulations, however, do not reach volumes needed to match upcoming surveys. We present results for clustering of galaxies using a new, large volume simulation as part MillenniumTNG (MTNG) project. With computational that is $\approx15$ times larger than next largest such currently available, we show MTNG able accurately reproduce observed function stellar mass....
ABSTRACT The intrinsic alignment (IA) of observed galaxy shapes with the underlying cosmic web is a source contamination in weak lensing surveys. Sensitive methods to identify IA signal will therefore need be included upcoming analysis pipelines. Hydrodynamical cosmological simulations allow us directly measure ellipticities galaxies, and thus provide powerful approach predict understand signal. Here we employ novel, large-volume hydrodynamical simulation MTNG740, product MillenniumTNG...
ABSTRACT We present the data release of Uchuu–SDSS galaxies: a set 32 high-fidelity galaxy light-cones constructed from large Uchuu 2.1 trillion particles N-body simulation using Planck cosmology. adopt subhalo abundance matching to populate Uchuu-box halo catalogues with SDSS luminosities. These box generated at several redshifts are combined create redshift-evolving properties. The built reproduce footprint and statistical properties main survey, along stellar masses star formation rates....
ABSTRACT This study investigates the clustering and bias of Luminous Red Galaxies (LRG) in BOSS-LOWZ, -CMASS, -COMB, eBOSS samples, using two types simulated lightcones: (i) high-fidelity lightcones from UchuuN-body simulation, employing SHAM technique to assign LRG (sub)haloes, (ii) 16 000 covariance GLAM-UchuuN-body simulations, including HOD data Uchuu. Our results indicate that Uchuu glam closely replicate BOSS/eBOSS data, reproducing correlation function power spectrum across scales...
The statistics of thermal gas pressure are a new and promising probe cosmology astrophysics. large-scale cross-correlation between galaxies the Sunyaev-Zeldovich effect gives bias-weighted mean electron pressure, <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mo stretchy="false">⟨</a:mo><a:msub><a:mi>b</a:mi><a:mi mathvariant="normal">h</a:mi></a:msub><a:msub><a:mi>P</a:mi><a:mi>e</a:mi></a:msub><a:mo stretchy="false">⟩</a:mo></a:math>. In this paper, we show that...
Measurements of redshift space distortions (RSD) provide a means to test models gravity on large-scales. We use mock galaxy catalogues constructed from large N-body simulations standard and modified measure clustering in space. focus our attention two the most representative popular families models: Hu \& Sawicki $f(R)$ normal branch DGP model. The are built using halo occupation distribution (HOD) prescription with HOD parameters tuned match number density real-space {\sc boss-cmass}...
ABSTRACT In this series of papers, we present an emulator-based halo model for the non-linear clustering galaxies in modified gravity cosmologies. first paper, emulators following properties: mass function, concentration–mass relation and halo-matter cross-correlation function. The are trained on data extracted from forge bridge suites N-body simulations, respectively, two (MG) theories: f(R) gravity, DGP model, varying three standard cosmological parameters Ωm0, H0, σ8, one MG parameter,...
ABSTRACT Upcoming large galaxy surveys will subject the standard cosmological model, Lambda Cold Dark Matter, to new precision tests. These can be tightened considerably if theoretical models of formation are available that predict clustering and galaxy–galaxy lensing on full range measurable scales, throughout volumes as those surveys, with sufficient flexibility uncertain aspects underlying astrophysics marginalized over. This, in particular, requires mock catalogues directly compared...
ABSTRACT We present mglens, a large series of modified gravity lensing simulations tailored for cosmic shear data analyses and forecasts in which cosmological parameters are varied simultaneously. Based on the forge bridgeN-body simulation suites presented companion papers, we construct 100 × 5000 deg2 mock Stage-IV from two 4D Latin hypercubes that sample gravitational f(R) nDGP gravity, respectively. These then used to validate our inference analysis pipeline based power spectrum,...
We analyse the two-point and marked correlation functions (mCFs) of haloes galaxies in three variants chameleon f(R) gravity model using N-body simulations, compare to a fiducial Λ cold dark matter based on general relativity (GR). Using halo occupation distribution (HOD) prescription, we populate with galaxies, where HOD parameters have been tuned such that galaxy number densities real-space modified models match those GR within 1–3 per cent. test idea since behaviour is dependent...