A5031313927- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Astrophysics and Star Formation Studies
- History and Developments in Astronomy
- Gamma-ray bursts and supernovae
- Solar and Space Plasma Dynamics
- Stellar, planetary, and galactic studies
- Scientific Research and Discoveries
- Pulsars and Gravitational Waves Research
- Geophysics and Gravity Measurements
- Aerodynamics and Acoustics in Jet Flows
École Polytechnique Fédérale de Lausanne
2022-2024
Centre de Recherche Astrophysique de Lyon
2022-2023
Centre National de la Recherche Scientifique
2022
École Normale Supérieure de Lyon
2022
Université Claude Bernard Lyon 1
2022
The recent launch of JWST has ushered in a new era high-redshift astronomy by providing detailed insights into the gas and stellar populations galaxies epoch reionization. Interpreting these observations translating them constraints on physics early galaxy formation is complex challenge that requires sophisticated models star interstellar medium (ISM) galaxies. To this end, we present Version 1 ${\rm SPHINX^{20}}$ public data release. full box cosmological radiation hydrodynamics simulation...
Cosmic rays (CRs) are thought to play an important role in galaxy evolution. We study their effect when coupled other sources of feedback, namely supernovae and stellar radiation, by including CR anisotropic diffusion radiative losses but neglecting streaming. Using the RAMSES-RT code, we perform first radiation-magnetohydrodynamics simulations isolated disc galaxies with without CRs. embedded dark matter haloes $10^{10}$, $10^{11}$ $10^{12}\, \rm M_{\odot}$ a maximum resolution $9 \,\rm...
Galaxies form and evolve via a multitude of complex physics. In this work, we investigate the role cosmic ray (CR) feedback in galaxy evolution reionisation, by examining its impact on escape ionising radiation from galaxies. For purpose, present two Sphinx cosmological radiation-magneto-hydrodynamics simulations, allowing for first time study CR thousands resolved galaxies during Epoch Reionisation (EoR). The simulations differ their prescriptions: one adopts calibrated strong supernova...
We report the spectroscopic confirmation of a merging pair massive quiescent galaxies at z=3.44. Using JWST observations, we confirm that two lie projected separation 4.5 kpc with velocity offset ∼ 680 (δ_z 0.01). The resides in core known rich overdensity galaxies, dubbed "Cosmic Vine". For both members, modeling spectral energy distributions and faint rest-frame optical emission lines indicate high stellar masses (M_⋆/M_⊙) ∼10.9) suppressed star formation (log <-10), more than an order...
ABSTRACT Using the cosmological simulations IllustrisTNG, we perform a comprehensive analysis of quiescent, massive galaxies at $z \gtrsim 3$. The goal is to understand what suppresses their star formation so early in cosmic time, and how other similar mass remain highly forming. As first-order result, are able produce massive, quiescent this high-redshift regime. We find that active galactic nucleus (AGN) feedback primary cause halting early, galaxies. Not only do central, supermassive...
Feedback from black hole-powered jets has been invoked in many cosmological simulations to regulate star formation and quench galaxies. Despite this, observational evidence of how might be able affect their hosts remains scarce, especially for low power halos smaller than clusters. Recent observations outflows around FR0 galaxies, that host compact radio-loud sources, imply lower-power jetted active galactic nuclei (AGN) may have a significant impact on through jet interactions with the...
Abstract Feedback from black-hole-powered jets has been invoked in many cosmological simulations to regulate star formation and quench galaxies. Despite this, observational evidence of how might be able affect their hosts remains scarce, especially for low-power halos smaller than clusters. Recent observations outflows around FR0 galaxies, which host compact radio-loud sources, imply that lower-power jetted active galactic nuclei (AGN) may have a significant impact on through jet...
Galaxies form and evolve via a multitude of complex physics. In this work, we investigate the role cosmic ray (CR) feedback in galaxy evolution reionisation, by examining its impact on escape ionising radiation from galaxies. For purpose, present two cosmological radiation-magneto-hydrodynamics simulations, enabling, for first time, study CR thousands resolved galaxies during Epoch Reionisation (EoR). The simulations differ their prescriptions: one adopts calibrated strong supernova (SN)...
ABSTRACT The circumgalactic medium (CGM) contains information on the cumulative effect of galactic outflows over time, generally thought to be caused by feedback from star formation and active nuclei. Observations such via absorption in CGM gas quasar sightlines show a significant amount cold (${\lesssim}10^4\,{\rm K}$) gas, which cosmological simulations struggle reproduce. Here, we use adaptive mesh refinement hydrodynamical code Ramses investigate cosmic rays (CR) content using three zoom...
Enshrouded in several well-known controversies, dwarf galaxies have been extensively studied to learn about the underlying cosmology, notwithstanding that physical processes regulating their properties are poorly understood. To shed light on these processes, we introduce Pandora suite of 17 high-resolution (3.5 parsec half-cell side) galaxy formation cosmological simulations. Commencing with thermo-turbulent star and mechanical supernova feedback, gradually increase complexity physics...
The recent launch of JWST has ushered in a new era high-redshift astronomy by providing detailed insights into the gas and stellar populations galaxies epoch reionization. Interpreting these observations translating them constraints on physics early galaxy formation is complex challenge that requires sophisticated models star interstellar medium (ISM) galaxies. To this end, we present Version 1 Sphinx$^{20}$ public data release. full box cosmological radiation hydrodynamics simulation...
Using the cosmological simulations IllustrisTNG, we perform a comprehensive analysis of quiescent, massive galaxies at $z \gtrsim 3$. The goal is to understand what suppresses their star formation so early in cosmic time, and how other similar mass remain highly star-forming. We find that active galactic nuclei (AGN) feedback primary cause halting early, galaxies. Not only do central supermassive black holes quenched have earlier seed times, but they also grow faster than star-forming As...
ABSTRACT Enshrouded in several well-known controversies, dwarf galaxies have been extensively studied to learn about the underlying cosmology, notwithstanding that physical processes regulating their properties are poorly understood. To shed light on these processes, we introduce Pandora suite of 17 high-resolution (3.5 parsec half-cell side) galaxy formation cosmological simulations. Commencing with magneto-thermo-turbulent star and mechanical supernova (SN) feedback, gradually increase...
The circumgalactic medium (CGM) contains information on the cumulative effect of galactic outflows over time, generally thought to be caused by feedback from star formation and active nuclei. Observations such via absorption in CGM gas quasar sightlines show a significant amount cold ($\lesssim 10^4 \; \rm{K}$) which cosmological simulations struggle reproduce. Here, we use adaptive mesh refinement hydrodynamical code RAMSES investigate cosmic rays (CR) content using three zoom realizations...