A5083924622- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Stellar, planetary, and galactic studies
- Atmospheric Ozone and Climate
- Adaptive optics and wavefront sensing
- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Spacecraft Design and Technology
- Photocathodes and Microchannel Plates
- Spacecraft and Cryogenic Technologies
- Calibration and Measurement Techniques
- Radio Astronomy Observations and Technology
- Astronomical Observations and Instrumentation
- Astrophysical Phenomena and Observations
- Cosmology and Gravitation Theories
- Spectroscopy and Laser Applications
- Geophysics and Gravity Measurements
- Scientific Research and Discoveries
- Optical properties and cooling technologies in crystalline materials
- Plant Water Relations and Carbon Dynamics
- Nanofabrication and Lithography Techniques
- Force Microscopy Techniques and Applications
- Astro and Planetary Science
- Rocket and propulsion systems research
Space Telescope Science Institute
2019-2024
Leibniz Institute for Astrophysics Potsdam
2024
Laboratoire d’Astrophysique de Marseille
2017-2021
Aix-Marseille Université
2017-2019
Centre National de la Recherche Scientifique
2017-2019
European Southern Observatory
2017-2019
Château Gombert
2019
Project AMIGA (Absorption Maps In the Gas of Andromeda) is a large ultraviolet Hubble Space Telescope program, which has assembled sample 43 QSOs that pierce circumgalactic medium (CGM) Andromeda (M31) from R=25 to 569 kpc (25 them probing gas 25 about virial radius-Rvir = 300 kpc-of M31). Our provides an unparalleled look at physical conditions and distribution metals in CGM single galaxy using ions probe wide range phases (Si II, Si III, IV, C O VI, latter being Far Ultraviolet...
Galaxy halos appear to be missing a large fraction of their baryons, most probably hiding in the circumgalactic medium (CGM), diffuse component within dark matter halo that extends far from inner regions galaxies. A powerful tool study CGM gas is offered by absorption lines spectra background quasars. Here, we present optical (MUSE) and mm (ALMA) observations field quasar Q1130-1449 which includes log [N(H I)/cm^-2]=21.71+/-0.07 absorber at z=0.313. Ground-based VLT/MUSE 3D spectroscopy...
Abstract The circumgalactic medium (CGM) is often assumed to exist in or near hydrostatic equilibrium, with the regulation of accretion and effects feedback treated as perturbations a stable balance between gravity thermal pressure. We investigate global equilibrium CGM using four highly resolved L * galaxies from Figuring Out Gas & Galaxies Enzo (FOGGIE) project. FOGGIE simulations were specifically targeted at fine spatial mass resolution (Δ x ≲ 1 kpc h −1 M ≃ 200 ⊙ ). develop new...
We present MUSE observations of the field quasar Q0152$-$020 whose spectrum shows a Lyman limit system (LLS) at redshift $z_{\rm abs} = 0.38$, with metallicity Z $\gtrsim 0.06$ Z$_\odot$. The low ionization metal lines associated LLS two narrow distinct absorption components velocity separation 26 km ${\rm s}^{-1}$. detect six galaxies within 600 s}^{-1}$ from redshift; their projected distances sightline range 60 to 200 kpc. optical spectra five these exhibit prominent nebular emission...
We present results of the MUSE-ALMA Halos, an ongoing study Circum-Galactic Medium (CGM) low redshift galaxies (z < 1.4), currently comprising 14 strong HI absorbers in five quasar fields. detect 43 associated with down to star formation rate (SFR) limits 0.01-0.1 solar masses/yr, found within impact parameters (b) 250 kpc from sightline. Excluding targeted absorbers, we report a high detection 89 per cent and find that most absorption systems are pairs or groups (three eleven members). note...
Abstract Over the next decade, astronomical community will be commissioning multiple wide-field observatories well suited for studying stellar halos in both integrated light and resolved stars. In preparation this, we use five high-resolution cosmological simulations of Milky Way–like galaxies from FOGGIE suite to explore properties components halos. These are run with high time (5 Myr) mass (1000 M ⊙ ) resolution better model origins low-density regions like We find that have masses,...
Abstract Gas-phase metallicity gradients are a crucial element in understanding the chemical evolution of galaxies. We use FOGGIE simulations to study (∇ Z ) six Milky Way–like galaxies throughout their evolution. generally exhibit steep negative for most history, with only few short-lived instances reaching positive slopes that appear arise mainly from interactions other concurs simulation results but disagrees robust observational finding flat and common at z > 1. By tracking gradient...
We study ram pressure stripping in simulated Milky Way-like halos at z>=2 from the Figuring Out Gas & Galaxies In Enzo (FOGGIE) project. These simulations reach exquisite resolution their circumgalactic medium (CGM) gas owing to FOGGIE's novel refinement scheme. The CGM of each halo spans a wide dynamic range density and velocity over its volume---roughly 6 dex 1000 km/s, respectively---translating into 5 imparted interacting satellites. profiles are highly stochastic, kpc-scale variations...
ABSTRACT We now have mounting evidences that the circumgalactic medium (CGM) of galaxies is polluted with metals processed through stars. The fate these however still an open question and several findings indicate they remain poorly mixed. A powerful tool to study low-density gas CGM offered by absorption lines in quasar spectra, although information retrieved limited 1D along sightline. report serendipitous discovery two close-by bright zgal = 1.148 extended a fortuitous intervening zabs...
Gas flows in and out of galaxies through their circum-galactic medium (CGM) are poorly constrained direct observations this faint, diffuse remain challenging. We use a sample five z ∼ 1–2 galaxy counterparts to damped Lyman-α absorbers (DLAs) combine data on cold gas, metals stellar content the same galaxies. present new Hubble Space Telescope (HST)/WFC3 imaging these fields three broad-band filters characterize properties host By fitting spectral energy distribution, we measure masses be...
We simulate the flux emitted from galaxy halos in order to quantify brightness of circumgalactic medium (CGM). use dedicated zoom-in cosmological simulations with hydrodynamical Adaptive Mesh Refinement code RAMSES, which are evolved down z=0 and reach a maximum spatial resolution 380 $h^{-1}$pc gas mass up 1.8$\times 10^{5} h^{-1} \rm{M}_{\odot}$ densest regions. compute expected emission CGM using CLOUDY emissivity models for different lines (e.g. Ly$\alpha$, CIV, OVI, CVI, OVIII)...
The gas cycling in the circumgalactic regions of galaxies is known to be multi-phase. MUSE-ALMA Haloes survey gathers a large multi-wavelength observational sample absorption and emission data with goal significantly advance our understanding physical properties such CGM gas. A key component multi-facility campaign conducted VLT/MUSE, ALMA HST. targets comprise 19 VLT/MUSE IFS quasar fields, including 32 $z_{\rm abs}<$0.85 strong absorbers measured N$_{HI}$ $\geq 10^{18}$ cm$^{\rm -2}$ from...
ABSTRACT Lyman α (Lyα) is now routinely used as a tool for studying high-redshift galaxies, and its resonant nature means it can trace neutral hydrogen around star-forming galaxies. Integral field spectrograph measurements of Lyα emitters indicate that significant extended halo emission ubiquitous such objects. We present sample redshift 0.23 to 0.31 galaxies observed with the Hubble Space Telescope selected match star formation properties high-z samples while optimizing observations...
ABSTRACT The flow of gas into and out galaxies leaves traces in the circumgalactic medium which can then be studied using absorption lines towards background quasars. We analyse 27 ${{\log [N({\textrm {H}}\, {\small {I}})/\rm {cm}^{-2}]}} &gt; 18.0$ H i absorbers at z = 0.2 to 1.4 from MUSE-ALMA Haloes survey with least one galaxy counterpart within a line sight velocity ±500 km s−1. perform 3D kinematic forward modelling these associated examine dense, neutral medium. From VLT/MUSE, HST...
Projected quasar galaxy pairs provide powerful means to study the circumgalactic medium (CGM) that maintains relics of galactic feedback and accreted gas from intergalactic medium. Here, we nature a Lyman Limit system (LLS) with N(HI)=10$^{19.1\pm0.3}$ cm$^{-2}$ dust-uncorrected metallicity [Fe/H]$=-1.1\pm0.3$ at $z=0.78$ towards Q0152$-020$. The MgII absorption profiles are composed main saturated few weaker optically thin components. Using MUSE observations detect one close redshift an...
Abstract The circumgalactic medium (CGM) of the Milky Way is mostly obscured by nearby gas in position–velocity space because we reside inside Galaxy. Substantial biases exist most studies Way’s CGM that focus on easier-to-detect high-velocity gas. With mock observations a analog from Figuring Out Gas & Galaxies Enzo (FOGGIE) simulation, investigate four observational related to CGM. First, QSO absorption-line probe limited amount mass: only 35% mass at high Galactic latitudes <?CDATA $|...
The distribution of gas and metals in the circumgalactic medium (CGM) plays a critical role how galaxies evolve. MUSE-ALMA Halos survey combines MUSE, ALMA HST observations to constrain properties multi-phase CGM associated with probed absorption. In this paper, we analyse 32 strong \ion{H}{i} Ly-$\alpha$ absorbers at redshift $0.2 \lesssim z 1.4$. We detect 79 within $\pm 500$ \kms \!of our 19 MUSE fields. These are found physical distances from 5.7 kpc reach star-formation rates as low...
The classical definition of the virial temperature a galaxy halo excludes fundamental contribution to energy partition halo: kinetic non-thermal gas motions. Using simulations low-redshift, $\sim L^*$ galaxies from FOGGIE project (Figuring Out Gas & Galaxies In Enzo) that are optimized resolve low-density gas, we show motions is roughly equal thermal simulated halos have 2\times$ lower bulk temperatures than expected equilibrium, owing significant formally excluded $T_\mathrm{vir}$. We...
We present results of MUSE-ALMA Halos, an ongoing study the Circumgalactic Medium (CGM) galaxies ($z \leq$ 1.4). Using multi-phase observations we probe neutral, ionised and molecular gas in a sub-sample containing six absorbers nine associated redshift range $z \sim 0.3-0.75$. Here, give in-depth analysis newly CO-detected galaxy Q2131-G1 ($z=0.42974$), while providing stringent mass depletion time limits for non-detected galaxies. is with absorber column densities...
The Faint Intergalactic Medium Redshifted Emission Balloon (FIREBall) is a mission designed to observe faint emission from the circumgalactic medium of moderate redshift (z~0.7) galaxies for first time. FIREBall observes component that plays key role in how form and evolve, likely contains significant amount baryons, has only recently been observed at higher redshifts visible. Here we report on 2018 flight FIREBall-2 telescope, which occurred September 22nd, Fort Sumner, New Mexico. was...
Understanding how galaxies interact with the circumgalactic medium (CGM) requires determining morphological and stellar properties correlate their CGM properties. We report an analysis of 66 well-imaged detected in HST VLT MUSE observations determined to be within $\pm$500 km s$^{-1}$ redshifts strong intervening quasar absorbers at $0.2 \lesssim z 1.4$ H I column densities $N_{\rm I}$ $>$ $10^{18}$ $\rm cm^{-2}$. present geometrical (S\'ersic indices, effective radii, axis ratios, position...
We report the discovery of a rare Mg II lambda 2796, 2803 doublet emission halo around star-forming galaxy with $ (M_ 0.3$ at $z=0.737$ in deep (9.94 h) VLT/MUSE data from MUSE-HUDF mosaic. While central region prominently displays an absorption-dominated characterized by discernible P-Cyg features, our examination reveals remarkably extended spanning approximately kpc galaxy. introduce simple outflow radiative transfer modeling scheme based on Sobolev approximation, and we employed Bayesian...
ABSTRACT Determining the clumpiness of matter around galaxies is pivotal to a full understanding spatially inhomogeneous, multiphase gas in circumgalactic medium (CGM). We combine high resolved 3D observations with hydrodynamical cosmological simulations measure cold clumpiness. present new adaptive-optics-assisted VLT/MUSE quadruply lensed quasar, targeting CGM 2 foreground z ∼ 1 observed absorption. additionally use zoom-in FOGGIE exquisite resolution (∼0.1 kpc scales) compute physical...
Here we discuss advances in UV technology over the last decade, with an emphasis on photon counting, low noise, high efficiency detectors sub-orbital programs. We focus use of innovative a NASA astrophysics balloon telescope, FIREBall-2, which successfully flew Fall 2018. The FIREBall-2 telescope is designed to make observations distant galaxies understand more about how they evolve by looking for diffuse hydrogen galactic halo. payload utilizes 1.0-meter class ultraviolet multi-object...