A5003126790- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Cosmology and Gravitation Theories
- Astrophysics and Star Formation Studies
- Scientific Research and Discoveries
- Astronomical Observations and Instrumentation
- Gamma-ray bursts and supernovae
- Relativity and Gravitational Theory
- Computational Physics and Python Applications
- Advanced Thermodynamics and Statistical Mechanics
- History and Developments in Astronomy
- Complex Systems and Time Series Analysis
- Mathematical Dynamics and Fractals
- Dark Matter and Cosmic Phenomena
- Solar and Space Plasma Dynamics
- Chaos control and synchronization
- Radio Astronomy Observations and Technology
- Astrophysical Phenomena and Observations
- Pulsars and Gravitational Waves Research
- Statistical Mechanics and Entropy
- Advanced Mathematical Theories and Applications
- Remote Sensing in Agriculture
- Fractal and DNA sequence analysis
- Quantum chaos and dynamical systems
Universidad Autónoma de Madrid
2013-2024
Centro de Astrobiología
2015-2018
Netherlands Institute for Radio Astronomy
2015-2017
Canadian Institute for Theoretical Astrophysics
1993
University of Toronto
1993
The ever increasing size and complexity of data coming from simulations cosmic structure formation demands equally sophisticated tools for their analysis. During the past decade, art object finding in these has hence developed into an important discipline itself. A multitude codes based upon a huge variety methods techniques have been spawned yet question remained as to whether or not they will provide same (physical) information about structures interest. Here we summarize extent previous...
The significant diversity of rotation curve (RC) shapes in dwarf galaxies has recently emerged as a challenge to LCDM: dark matter (DM) only simulations, DM halos have universal cuspy density profile that results self-similar RC shapes. We compare simulated from the NIHAO project with observed homogeneous SPARC dataset. can expand form cores, degree expansion depending on their stellar-to-halo mass ratio. By means $V_{\rm 2kpc}-V_{\rm Rlast}$ relation (where is outermost measured velocity),...
Many massive star-forming disc galaxies in the redshift range 3–0.5 are observed to have a clumpy morphology showing giant clumps of size ∼1 kpc and masses about 107–1010 M⊙. The nature fate these still under debate. In this work, we use 19 high-resolution simulations from Numerical Investigations Hundred Astrophysical Objects (NIHAO) sample study formation evolution discs high-redshift galaxies. We mock Hubble Space Telescope-CANDELS observations created with radiative transfer code...
We describe an SPH model for chemical enrichment and radiative cooling in cosmological simulations of structure formation. This includes: i) the delayed gas restitution from stars by means a probabilistic approach designed to reduce statistical noise and, hence, allow study inner objects with moderately high numbers particles; ii) full dependence metal production on detailed composition stellar particles using, first time codes, Qij matrix formalism that relates each nucleosynthetic product...
Using 22 hydrodynamical simulated galaxies in a LCDM cosmological context we recover not only the observed baryonic Tully-Fisher relation, but also "mass discrepancy--acceleration" which reflects distribution of main components throughout their disks. This implies that simulations, span range 52 < V$_{\rm flat}$ 222 km/s where is circular velocity at flat part rotation curve, and match galaxy scaling relations, are able to relations between distributions stars, gas dark matter over radial...
ABSTRACT In this work, we aim at investigating the morphology evolution of Milky Way mass-like dark matter haloes selected from cielo and IllustrisTNG projects. The connection between halo shapes their environment has been studied in previous works z = 0 but remains yet to be fully understood. We focus on across cosmic time relation with infalling material, using hydrodynamical simulations. Our findings show that tend more triaxial earlier times as a consequence stronger accretion direction...
We compute and study the infrared sub-mm properties of high redshift ($z \gtrsim 1$) simulated clusters proto-clusters. The results a large set hydro-dynamical zoom-in simulations including active galactic nuclei (AGN) feedback, have been treated with recently developed radiative transfer code GRASIL-3D, which accounts for effect dust reprocessing in an arbitrary geometry. Here, we slightly generalized to adapt it present purpose. Then post-processed boxes physical size 2 Mpc encompassing...
view Abstract Citations (107) References (41) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Clustering Paradigms and Multifractal Measures Martinez, Vicent J. ; Jones, Bernard T. Dominguez-Tenreiro, Rosa van de Weygaert, Rien A subsample of the CfA galaxy catalog two clustering models look different to eye, yet have comparable two-point correlation functions. We show how technique "measure analysis" clearly reveals nature differences, thereby providing an...
We analyze and compare the bulges of a sample L* spiral galaxies in hydrodynamical simulations cosmological context, using two different codes, P-DEVA GASOLINE. The codes regulate star formation very ways, with inputing low efficiency under assumption that feedback occurs on subgrid scales, while GASOLINE have which drives large scale outflows. In all cases, marked knee-shape mass aggregation tracks, corresponding to transition from an early phase rapid assembly later slower one, separates...
In this work we present a detailed analysis of the global and fine structure four middle-mass disc galaxies obtained from hydrodynamic simulations in Λcold dark matter (ΛCDM) scenario. These objects have photometric disc-to-total ratios good agreement with those observed for late-type spirals, as well kinematic properties observational I-band Tully–Fisher relation. We identify different dynamical components at redshift zero on basis both orbital parameters binding energy stars galaxy. way,...
We present smoothed particle hydrodynamics cosmological simulations of the formation three disk galaxies with a detailed treatment chemical evolution and cooling. The resulting have properties compatible observations: relatively high disk-to-total ratios, thin stellar disks, good agreement Tully–Fisher luminosity–size relations. They break in luminosity profile at 3.0 ± 0.5 scale lengths while showing an exponential mass without any apparent breaks, which is line recent observational...
With the ever-increasing size and complexity of fully self-consistent simulations galaxy formation within framework cosmic web, demands upon object finders for these have simultaneously grown. To this extent we initiated Halo-Finder Comparison Project that gathered together all experts in field has so far led to two comparison papers, one dark matter haloes, subhaloes. However, as state-of-the-art simulation codes are perfectly capable not only following evolution but also accounting...
Using cosmological galaxy simulations from the MaGICC project, we study evolution of stellar masses, star formation rates and gas phase abundances forming galaxies. We derive masses using observational relations based on spectral energy distributions by applying new radiative transfer code GRASIL-3D to our simulated The match well mass-halo mass relation, have a main sequence that maintains constant slope out redshift z $\sim$ 2, populate projections - metallicity plane, similar observed...
We introduce a new model for the spectral energy distribution of galaxies, GRASIL-3D, which includes careful modelling dust component interstellar medium. GRASIL-3D is an entirely based on formalism existing and widely applied spectrophotometric model, GRASIL, but specifically designed to be interfaced with galaxies any arbitrarily given geometry, such as calculated by theoretical hydrodynamical galaxy formation codes. separately treat radiative transfer in molecular clouds diffuse cirrus...
Aims. Using a suite of cosmological chemodynamical disc galaxy simulations, we assess how (a) radial metallicity gradients evolve with scaleheight; (b) the vertical change through thick disc; and (c) gradient stellar rotation velocity varies disc. We compare Milky Way to search for analogous trends. Methods. analyse five simulated spiral galaxies masses comparable Way. The simulations span range star formation energy feedback strengths prescriptions, particle- grid-based hydrodynamical...
The CIELO project introduces a novel set of chemo-dynamical zoom-in simulations designed to simultaneously resolve galaxies and their nearby environments. initial conditions include diverse range cosmic structures, such as local groups, filaments, voids, walls, allowing for detailed exploration within the broader context web. This study presents characterizes global properties It focuses on with stellar masses ranging from log [8,11] solar examines key scaling relations, including mass-size...
The distribution of chemical elements in the star-forming regions can store information on enrichment history galaxies. Negative metallicity gradients are expected galaxies forming inside-out. However, observations show that profiles be broken. We aim to study diversity arise current cosmological context and compare them with available observations. also seek identify physical processes responsible for breaks by using two as case studies. analyze central from simulations CIELO project,...
Context. The CIELO project introduces a novel set of chemo-dynamical zoom-in simulations, designed to simultaneously resolve galaxies and their nearby environments. initial conditions (ICs) encompass diverse range cosmic structures, including local groups, filaments, voids, walls, enabling detailed exploration within broader web context. Aims. This study aims present the ICs characterise global properties Specifically, it focuses on with stellar masses ranging from 10 8 11 M ⊙ investigates...
We present a detailed characterization of planes satellite galaxies in the Milky Way (MW) and M31. For positional analysis, we introduce an extension to `4-galaxy-normal density plot' method \citep[][P13]{Pawlowski13}. It finds normal directions predominant planar configurations satellites system, yielding for each \textit{collection} increasing member satellites. This allows quantify quality terms population ($N_{\rm sat}$) spatial flattening ($c/a$). apply this latest data confirmed MW M31...
Context. Primordial black holes (PBHs) have been proposed as potential candidates for dark matter (DM) and garnered significant attention in recent years. Aims. Our objective is to delve into the distinct impact of PBHs on gas properties their role shaping cosmic structure. Specifically, we aim analyze evolving while considering presence accreting with varying monochromatic masses different quantities. By studying feedback effects produced by this accretion, our final goal assess...
We have carried out a comparative analysis of the properties dark matter halos in N-body and hydrodynamical simulations.We analyze their density profiles, shapes kinematical with aim assessing effects that processes might produce on evolution component.The simulations performed allow us to reproduce high resolution, although range circular velocities is limited.We find for [150 -200] km s -1 at virial radius, presence baryons affects component central region modifying velocity dispersions.We...
ABSTRACT We study the impact of environment on galaxies as they fall in and orbit potential well a Local Group (LG) analogue, following them with high cadence. The analysis is performed eight disc satellite from CIELO suite hydrodynamical simulations. All have stellar masses within range $[10^{8.1}\!-\!10^{9.56}] \, \mathrm{M}_{\odot }\, {\rm h}^{-1}$. measure tidal torques, ram pressure, specific star formation rates (sSFRs) function time, correlate amount gas lost by satellites along their...
We use cosmological smooth particle hydrodynamical (SPH) simulations to study the effects of mergers in star formation history galactic objects hierarchical clustering scenarios. find that during some merger events, gaseous discs can experience two starbursts: first one orbital decay phase, owing gas inflows driven as satellite approaches, and second when baryonic clumps collide. A trend for these induced starbursts be more efficient at transforming into stars is also found. detect systems...
We have analysed the mass and velocity distributions of two samples relaxed elliptical-like objects (ELOs) identified, at z= 0, in a set self-consistent hydrodynamical simulations operating context concordance cosmological model. ELOs been identified as those virtual galaxies having prominent, dynamically stellar spheroidal component, with no extended discs very low gas content. Our analysis shows that they are embedded extended, massive dark matter haloes, also an corona hot diffuse gas....
view Abstract Citations (39) References (24) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Primordial Nucleosynthesis Bounds on the Brans-Dicke Theory Serna, A. ; Dominguez-Tenreiro, R. Yepes, G. A thorough calculation of light-element production in cosmologies is presented by taking into account most general class these models. The comparison outputs our with current observational data results bounds allowed omega-values. Cosmological models where phi-R...