A5075253294- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Geophysics and Gravity Measurements
- Ionosphere and magnetosphere dynamics
- CCD and CMOS Imaging Sensors
- Astrophysical Phenomena and Observations
- Spectroscopy and Laser Applications
- Astronomical Observations and Instrumentation
- Scientific Research and Discoveries
- Radio Astronomy Observations and Technology
- Statistical and numerical algorithms
European Southern Observatory
2023-2024
Centre de Recherche Astrophysique de Lyon
2023-2024
Université Claude Bernard Lyon 1
2023-2024
École Normale Supérieure de Lyon
2023-2024
Centre National de la Recherche Scientifique
2023-2024
Sorbonne Université
2020
We present the design, rationale, properties, and catalogues of MusE Gas FLOw Wind survey (MEGAFLOW) cool gaseous halos z≃1.0 galaxies, using low-ionisation absorption systems. The consists 22 quasar fields selected from Sloan Digital Sky Survey (SDSS), including multiple (≥3) strong lines over redshift range $0.3<z<1.5$. Each was observed with Multi-Unit Spectroscopic Explorer (MUSE) Ultraviolet Visual Echelle Spectrograph (UVES), for a total 85 hours 63 hours, respectively. UVES data...
Determining when the first galaxies formed remains an outstanding goal of modern observational astronomy. Theory and current stellar population models imply that at least $z = 14-15$. But to date, only one galaxy > 13$ (GS-z13-0) has been spectroscopically confirmed.. The `HD1' was recently proposed be a z=13.27 based on its potential Lyman break tentative [O III] 88 {\mu}m detection with ALMA. We hereby aim test this scenario new ALMA Band 4, DDT observations what would [C II] 158 emission,...
Context. Faint, star-forming galaxies are likely to play a dominant role in cosmic reionisation. Great strides have been made recent years characterise these populations at high redshifts ( z > 3). Now, for the first time, with JWST photometry beyond 1 μm rest frame, we can derive accurate stellar masses and position on galaxy main sequence. Aims. We seek assess place of 96 individual Lyman- α emitters (LAEs) selected behind A2744 lensing cluster MUSE IFU spectroscopy also compare derived...
ABSTRACT The morphology of galaxies is shaped by stellar activity, feedback, gas and dust properties, interactions with surroundings, can therefore provide insight into these processes. In this paper, we study the spatial offsets between interstellar medium emission in a sample 54 main-sequence star-forming at z ∼ 4–6 observed Atacama Large Millimeter/submillimeter Array (ALMA), drawn from ALMA Program to INvestigate C+ Early times (ALPINE). We find no significant offset for majority (∼70...
The circumgalactic medium (CGM) is a key component in understanding the physical processes governing flows of gas around galaxies. Quantifying its evolution and dependence on galaxy properties particularly important for our accretion feedback mechanisms. We selected volume-selected sample 66 isolated star-forming galaxies at $0.4< z <1.5$ with log(M_⋆/ 9 from MusE GAs FLOw Wind (MEGAFLOW) survey. Using absorptions background quasars, we measured covering fraction, f_c, quantified how...
We study the link between gas flow events and key galaxy scaling relations: relations star formation rate (SFR) stellar mass (the main sequence, MS), metallicity mass-metallicity relation, MZR) metallicity, SFR fundamental FMR). Using all star-forming galaxies (SFGs) in 22 MUSE fields of MusE GAs FLOw Wind (MEGAFLOW) survey, we derive MS, MZR FMR for 385 SFGs with $M = 10^8 - 10^{11.5}$ $M_\odot$ at redshifts 0.35 < z 0.85. data complementary X-Shooter spectra 0.85 1.4, determine locations...
ABSTRACT We present a study of the cool gas (≈104 K) traced by Mg ii absorptions around groups galaxies in MEGAFLOW (MusE GAs FLOw and Wind) survey. Using combination two algorithms, we blindly identify 32 more than 5 at 0.3 &lt; z 1.5 with $10.7 \lt \log _{10}(M/\rm {\rm M}_{\odot }) 13.7$. Among them 26 can be used to potential counterpart absorptions. report that 21 out total 120 absorption systems are associated groups. observe rest-frame equivalent width ($W_{\rm r}^{2796}$) drops...
Absorption line spectroscopy using background quasars can provide strong constraints on galactic outflows. In this paper, we investigate possible scaling relations between outflow properties, namely velocity \Vout, the mass ejection rate $\dot M_{\rm out}$, and loading factor $\eta$ host galaxy such as star formation (SFR), SFR surface density, redshift, stellar outflows probed by from MEGAFLOW other surveys. We find that $V_{\rm out}$ ($\eta$) is (anti-)correlated with density. extend...
Determining when the first galaxies formed remains an outstanding goal of modern observational astronomy. Theory and current stellar population models imply that at least $z = 14-15$. But to date, only one galaxy > 13$ (GS-z13-0) has been spectroscopically confirmed.. The `HD1' was recently proposed be a z=13.27 based on its potential Lyman break tentative [O III] 88 μm detection with ALMA. We hereby aim test this scenario new ALMA Band 4, DDT observations what would [C II] 158 emission,...
ABSTRACT Little is known about the mass–metallicity relation (MZR) in galaxies at cosmic dawn. Studying first appearance of MZR one keys to understand formation and evolution galaxies. In order lay groundwork for upcoming observational campaigns, we analyse 290 haloes spanning Mh = 109–1011 M⊙ selected from FirstLight cosmological zoom simulations predict z 5–8. Over this interval, metallicity with stellar mass M* 108 declines by ≤0.2 dex. This contrasts observed tendency metallicities...
Faint, star-forming galaxies likely play a dominant role in cosmic reionisation. Strides have been made recent years to characterise these populations at high redshifts ($z>3$). Now for the first time, with JWST photometry beyond 1$\,\mu m$ rest frame, we can derive accurate stellar masses and position on galaxy main sequence. We seek assess place of 96 individual Lyman-alpha emitters (LAEs) selected behind A2744 lensing cluster MUSE spectroscopy also compare derived luminosities equivalent...
Galaxy morphology is shaped by stellar activity, feedback, gas and dust properties, interactions with surroundings, can therefore provide insight into these processes. In this paper, we study the spatial offsets between interstellar medium emission in a sample of 54 main-sequence star-forming galaxies at $z\sim4-6$ observed Atacama Large Millimeter/submillimeter Array (ALMA) drawn from ALMA Program to INvestigate C$^+$ Early times (ALPINE). We find no significant offset for majority ($\sim$...
Absorption line spectroscopy using background quasars can provide strong constraints on galactic outflows. In this paper we investigate possible scaling relations between outflow properties, namely velocity V out , mass ejection rate Ṁ and loading factor η the host galaxy such as star formation (SFR), SFR surface density, redshift, stellar mass, outflows probed by from MEGAFLOW other surveys. We find that ( ) is (anti-)correlated with density. extend formalism of momentum-driven a previous...
Galaxy mergers play a critical role in galaxy evolution - altering the size, morphology, dynamics and composition of galaxies. So far, have mostly been identified through visual inspection their rest-frame optical NIR emission. But, dust can obscure this emission, resulting misclassification as single galaxies, incorrect interpretation baryonic properties. Having serendipitously discovered dust-obscured merger at z = 1.17, we aim to determine properties two merging including star formation...
Context. Galaxy mergers play a critical role in galaxy evolution. They alter the size, morphology, dynamics, and composition of galaxies. have so far mostly been identified through visual inspection their rest-frame optical near-IR (NIR) emission. Dust can obscure this emission, however, resulting misclassification as single galaxies an incorrect interpretation baryonic properties. Aims. Having serendipitously discovered dust-obscured merger at z = 1.17, we aim to determine properties two...
We present the design, rationale, properties and catalogs of MusE Gas FLOw Wind survey (MEGAFLOW), a cool gaseous halos $z\sim1$ galaxies using low-ionization MgII absorption systems. The consists 22 quasar fields selected from Sloan Digital Sky Survey (SDSS) having multiple ($\geq3$) strong lines over redshift range $0.3<z<1.5$. Each was observed with Multi-Unit Spectroscopic Explorer (MUSE) Ultraviolet Visual Echelle Spectrograph (UVES), for total 85~hr 63~hr, respectively. UVES data...
The circumgalactic medium (CGM) is a key component needed to understand the physical processes governing flows of gas around galaxies. Quantifying its evolution and dependence on galaxy properties particularly important for our understanding accretion feedback mechanisms. We select volume-selected sample 66 {\it isolated} star-forming galaxies (SFGs) at $0.4< z <1.5$ with $\log(M_\star/M_{\odot})> 9$ from MusE GAs FLOw Wind (MEGAFLOW) survey. Using MgII 2796,2803 absorptions in background...
We study the link between gas flow events and key galaxy scaling relations: relations star formation rate (SFR) stellar mass (the main sequence, MS), metallicity mass-metallicity relation, MZR) metallicity, SFR fundamental FMR). Using all star-forming galaxies (SFGs) in 22 MUSE fields of MusE GAs FLOw Wind (MEGAFLOW) survey, we derive MS, MZR FMR for 385 SFGs with $M = 10^8 - 10^{11.5}$ $M_\odot$ at redshifts 0.35 < z 0.85. data complementary X-Shooter spectra 0.85 1.4, determine...
We present a study of the cool gas ($\approx 10^4$ K) traced by MgII absorptions around groups galaxies in MEGAFLOW survey. Using combination two algorithms we blindly identify 32 more than 5 at $0.3 < z 1.5$ with $10.7 \log_{10}(M/\rm M_{\odot}) 13.7$. Among them 26 can be used to potential counterpart absorptions. report that 21 out total 120 absorption systems are associated groups. observe rest-frame equivalent width ($W^{2796}_r$) drops an impact parameter $\approx 150$ projected kpc...
Abstract Galactic outflows are believed to play a critical role in the evolution of galaxies by regulating their mass build-up and star formation [1]. These tend form bipolar shapes above below galactic planes extend well into circumgalactic medium (CGM), up tens kpc perpendicular galaxy. They have been directly observed local Universe, e.g., around Milky Way M82 [2, 3]. At higher redshifts, cosmological simulations galaxy predict an increase frequency efficiency due increasing activity [4]....