A5040631666- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Algebraic Geometry and Number Theory
- Geometry and complex manifolds
- Advanced Algebra and Geometry
- Geometric and Algebraic Topology
- Gamma-ray bursts and supernovae
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Geometric Analysis and Curvature Flows
- Astrophysical Phenomena and Observations
- Black Holes and Theoretical Physics
- Intracranial Aneurysms: Treatment and Complications
- Cosmology and Gravitation Theories
- Homotopy and Cohomology in Algebraic Topology
- Radio Astronomy Observations and Technology
- Astrophysics and Cosmic Phenomena
- Traumatic Brain Injury and Neurovascular Disturbances
- Neuroinflammation and Neurodegeneration Mechanisms
- Biosimilars and Bioanalytical Methods
- CAR-T cell therapy research
- Tensor decomposition and applications
- Topological and Geometric Data Analysis
- 3D Printing in Biomedical Research
- Tryptophan and brain disorders
Universitätsklinikum Würzburg
2016-2025
Observatoire de Paris
2015-2025
Centre National de la Recherche Scientifique
2013-2025
Institut d'Astrophysique de Paris
2003-2025
Université Paris Sciences et Lettres
2017-2025
University of Parma
2015-2024
University of Milan
1993-2023
Centro San Giovanni di Dio Fatebenefratelli
2023
Istituti di Ricovero e Cura a Carattere Scientifico
2023
Klinik und Poliklinik für Neurologie
2023
The Spitzer Extended Deep Survey (SEDS) is a very deep infrared survey within five well-known extragalactic science fields: the UKIDSS Ultra-Deep Survey, Chandra Field South, COSMOS, Hubble North, and Groth Strip. SEDS covers total area of 1.46 deg2 to depth 26 AB mag (3σ) in both warm Infrared Array Camera (IRAC) bands at 3.6 4.5 μm. Because its uniform coverage so many widely-separated fields, subject roughly 25% smaller errors due cosmic variance than single-field same size. was designed...
We reproduce the blue and red sequences in observed joint distribution of colour magnitude for galaxies at low high redshifts using hybrid N-body/semi-analytic simulations galaxy formation. The match model data is achieved by mimicking effects cold flows versus shock heating coupled to feedback from active galactic nuclei (AGNs), as predicted Dekel & Birnboim (2006). After a critical epoch z=3, only haloes below shock-heating mass 10^12MSun enjoy gas supply form stars, while cooling star...
We use both an HI-selected and optically-selected galaxy sample to directly measure the abundance of galaxies as a function their "baryonic" mass (stars + atomic gas). Stellar masses are calculated based on optical data from Sloan Digital Sky Survey (SDSS) gas using hydrogen (HI) emission line Arecibo Legacy Fast ALFA (ALFALFA) survey. By technique matching, we combine measured baryonic (BMF) with dark matter halo in LCDM universe, order determine galactic baryon fraction host mass. find...
We have used GADGET2 to simulate the formation of an elliptical galaxy in a cosmological dark matter halo with mass 3x10^12M_Sun/h. Using stellar population synthesis model has allowed us compute magnitudes, colours and surface brightness profiles. included follow growth central black hole we compared results simulations without feedback from AGNs. studied interplay between cold gas accretion merging development galactic morphologies, link colour morphology evolution, effect AGN on...
We address the origin of `downsizing' elliptical galaxies, according to which stars in more massive galaxies formed earlier and over a shorter period than those less galaxies. show that this could be natural result shutdown star formation dark matter haloes above critical mass 10^12MSun. This is demonstrated using semianalytic simulation galaxy within standard hierarchical scenario structure formation. The assumed threshold motivated by prediction stable shock heating finding such reproduces...
ABSTRACT Roughly half of all stars reside in galaxies without significant ongoing star formation. However, galaxy formation models indicate that it is energetically challenging to suppress the cooling gas and lie at centers their dark matter halos. In this Letter, we show dependence quiescence on black hole stellar mass a powerful discriminant between differing for mechanisms Using observations 91 star-forming quiescent central with directly measured masses, find host more massive holes than...
We introduce a toy model that describes (in single equation) the mass in stars as function of halo and redshift. Our includes suppression gas accretion from gravitational shock heating AGN jets mainly for M_halo > M_shock ~ 10^12 M_Sun too hot IGM onto haloes with v_circ < 40 km/s, well stellar feedback drives out 120 km/s. run our on merger trees subhaloes high-resolution dark matter cosmological simulation. The galaxy is taken maximum between given by sum masses its progenitors (reduced...
We compare state-of-the-art semi-analytic models of galaxy formation as well advanced subhalo abundance matching with a large sample early-type galaxies from Sloan Digital Sky Survey at z < 0.3. focus our attention on the dependence median sizes central host halo mass. The data do not show any difference in structural properties environment, fixed stellar All hierarchical considered this work instead tend to predict moderate strong environmental dependence, size increasing by factor ∼1.5–3...
The origin of the quenching in galaxies is still highly debated. Different scenarios and processes are proposed. We use multi-band (400-1600 nm) bulge-disc decompositions massive redshift range 0<z<2 to explore distribution evolution log SFR-logM* plane as a function stellar mass-weighted bulge-to-total ratio (BTM) also for internal galaxy components (bulge/disc) separately. find evidence clear link between presence bulge flattening Main Sequence high-mass end. All bulgeless (BTM<0.2) lie on...
We use three-dimensional high-resolution adaptive-mesh-refinement simulations to investigate if mechanical feedback from active galactic nucleus jets can halt a massive cooling flow in galaxy cluster and give rise self-regulated accretion cycle. start with 3 × 109 M⊙ black hole at the centre of spherical halo mass Virgo cluster. Initially, all baryons are hot intracluster medium hydrostatic equilibrium within dark matter's gravitational potential. The accretes surrounding gas Bondi rate,...
We compare the galaxy population of an SPH simulation to those predicted by GalICS semi-analytic model and a stripped down version without supernova AGN feedback. The no-feedback make similar predictions for baryonic mass functions galaxies dependence these on environment redshift. two methods also content dark matter haloes as function halo gas accretion history galaxies. Both models predict bimodal at z=0. "red'' sequence poor, old is populated mainly satellite systems while, contrary...
We present a comparison of 14 galaxy formation models: 12 different semi-analytical models and 2 halo occupation distribution for based upon the same cosmological simulation merger tree information derived from it. The participating codes have proven to be very successful in their own right but they all been calibrated independently using various observational data sets, stellar models, trees. In this paper, we apply them without recalibration leads wide variety predictions mass function,...
Understanding how bulges grow in galaxies is critical step towards unveiling the link between galaxy morphology and star-formation. To do so, it necessary to decompose large sample of at different epochs into their main components (bulges disks). This particularly challenging, especially high redshifts, where are poorly resolved. work presents a catalog bulge-disk decompositions surface brightness profiles ~17.600 H-band selected CANDELS fields (F160W<23, 0<z<2) 4 7 filters covering spectral...
We have used the NIHAO (Numerical Investigation of a Hundred Astrophysical Objects) simulations to explore how supernovae (SNe) affect star formation in galaxies. find that SN feedback operates on all scales from interstellar medium (ISM) several virial radii. SNe regulate by preventing condensation Hi into h2 and moving cold neutral gas hot Hii phase. The first effect explains why dwarf galaxies forms stars inefficiently. second maintains ISM massive (Hii vents out at lower masses). At...
Black holes release energy via the production of photons in their accretion discs but also acceleration jets. We investigate relative importance these two paths over cosmic time by determining mechanical luminosity function (LF) radio sources and comparing it to a previous determination bolometric LF active galactic nuclei (AGN) from X-ray, optical infrared observations. The is computed steps: as its convolution with sources. Even large uncertainty deriving former, we can conclude that...
We analyze a sample of galaxies chosen to have F24 μm > 0.5 mJy and satisfy certain IRAC color criterion. Infrared Spectrograph (IRS) spectra yield redshifts, spectral types, polycyclic aromatic hydrocarbons (PAH) luminosities, which we add broadband photometry from optical through wavelengths, MIPS 24–160 μm, 1.1 mm, radio at 1.4 GHz. Stellar population modeling IRS together demonstrate that the double criteria used select this efficiently isolated massive star-forming z ∼ 1.9. This is...
The stellar mass–halo mass relation is a key constraint in all semi-analytic, numerical, and semi-empirical models of galaxy formation evolution. However, its exact shape redshift dependence remain under debate. Several recent works support the local universe steeper than previously thought. Based on comparisons with variety data massive central galaxies, we show that this steepening holds up to z ∼ 1 for masses Mstar ≳ 2 × 1011 M☉. Specifically, find significant evidence high-mass end slope...
GalICS 2.0 is a new semianalytic code to model the formation and evolution of galaxies in cosmological context. N-body simulations based on Planck cosmology are used construct halo merger trees, track subhaloes, compute spins measure concentrations. The accretion gas onto morphological modelled with prescriptions derived from hydrodynamic simulations. Star stellar feedback described phenomenological models (as other codes). computes rotation speeds gravitational potential dark matter, disc...
The mechanisms of mechanical energy recovery during gait have been thoroughly investigated in healthy subjects, but never described patients with Parkinson disease (PD). aim this study was to investigate whether such are preserved PD despite an altered pattern locomotion. We consecutively enrolled 23 (mean age 64±9 years) bilateral symptoms (H&Y ≥II) if able walk unassisted medication-off condition (overnight suspension all dopaminergic drugs). Ten subjects 62±3 walked both at their...
The Active Galactic Nuclei In Cosmological Simulations (AGNICS) project includes AGN into the GalICS hybrid (N-body + semi-analytic) model to explore quasar-galaxy link in a cosmological perspective. key problems are quasar fuelling mechanism, origin of BH bulge mass relation, causal and chronological between growth galaxy formation, properties hosts role feedback formation. This first paper has two goals: describe general structure assumptions method, apply AGNICS studying joint formation...
We estimate the stellar mass that satellite galaxies lose once they enter groups (and clusters) by identifying in a high-resolution cosmological N-body simulation, assigning entry masses to with halo abundance matching at time, and comparing predicted conditional function of $z\simeq0$ observations. Our results depend on stars form after time. A model which star formation shuts down completely as soon galaxy enters group environment is ruled out because it underpredicts even absence tidal...
Abstract Aneurysmal subarachnoid hemorrhage (aSAH) is a debilitating condition with significant morbidity and mortality rates. Despite advancements in treatment, understanding the underlying pathophysiology, particularly inflammatory response, remains crucial for improving patient outcomes. In this study, we investigated presence of transmembrane protein 119 (TMEM119) microglial cells cerebrospinal fluid (CSF) as potential marker neuroinflammation following aSAH. CSF samples were collected...
We have considered a phenomenologically motivated model in which galaxies are quenched when the energy output of central black hole exceeds hundred times gravitational binding baryons host halo. The reproduces mass functions star-forming and quiescent at 0<z<2.5 quenching boundary on $\Sigma_1$-stellar diagram. arises because colour-morphology relation. stellar surface density $\Sigma_1$ kiloparsec is morphological indicator. Galaxies becomes redder as increases until they cross enter...
ABSTRACT We have considered a phenomenologically motivated model in which galaxies are quenched when the energy output of central black hole exceeds hundred times gravitational binding baryons host halo. The reproduces mass functions star-forming and quiescent at $0\lt z\lt 2.5$ quenching boundary on $\Sigma _1$–$M_\star$ diagram. arises because colour–morphology relation. stellar surface density _1$ kiloparsec is morphological indicator. Galaxies becomes redder as increases until they cross...