N. Bouché
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View article: MUSEQuBES: the column density, covering fraction, mass, and environmental dependence of cool H <scp>i</scp> gas around low-redshift galaxies
MUSEQuBES: the column density, covering fraction, mass, and environmental dependence of cool H <span>i</span> gas around low-redshift galaxies Open
We investigate cool H i gas traced by Lyman series absorption around 256 galaxies at $z\approx 0.48$ (median stellar mass, $\log _{10}~(M_{\star }/\rm {\rm M}_{\odot })$ $= 8.7$) using 15 background quasars (median impact parameter, $D = 1…
View article: Galaxy Spectra Networks (GaSNet) – III. Reconstructive pre-trained network for spectrum reconstruction, redshift estimate, and anomaly detection
Galaxy Spectra Networks (GaSNet) – III. Reconstructive pre-trained network for spectrum reconstruction, redshift estimate, and anomaly detection Open
Classification of spectra (1) and anomaly detection (2) are fundamental steps to guarantee the highest accuracy in redshift measurements (3) in modern all-sky spectroscopic surveys. We introduce a new Galaxy Spectra Neural Network (GaSNet-…
View article: Multiple star-forming episodes of intermediate-redshift galaxies
Multiple star-forming episodes of intermediate-redshift galaxies Open
In this work, we derive and analyse the star formation histories of 393 intermediate-redshift (0.1 łeq z łeq 0.9) galaxies with stellar masses between ∼10^8 - 10^12 M_⊙. We focus on galaxies located in the CANDELS/GOOD-S and CANDELS/COSMOS…
View article: MUSE-DARK-I: Dark matter halo properties of intermediate-z star-forming galaxies
MUSE-DARK-I: Dark matter halo properties of intermediate-z star-forming galaxies Open
[Abridged] We analyse the dark matter (DM) halo properties of 127 0.380% of the sample. We find that the kinematically inferred stellar masses agree with values from SED fitting. We find that 89% of galaxies have DM fractions >50%. For 66%…
View article: MUSEQuBES: Connecting H <scp>i</scp> Absorption with Ly<i>α</i> Emitters at <i>z</i> ≈ 3.3
MUSEQuBES: Connecting H <span>i</span> Absorption with Ly<i>α</i> Emitters at <i>z</i> ≈ 3.3 Open
We present a comprehensive analysis of H i absorption around 96 Ly α emitters (LAEs) at z ≈ 3.3 (median Ly α luminosity ≈10 42 erg s −1 ). These LAEs were identified within eight MUSE fields, each on the sky and centered on a bright …
View article: MusE GAs FLOw and Wind (MEGAFLOW)
MusE GAs FLOw and Wind (MEGAFLOW) Open
We present the design, rationale, properties, and catalogues of the MusE Gas FLOw and Wind survey (MEGAFLOW) of cool gaseous halos of z ≃ 1.0 galaxies, using low-ionisation Mg II absorption systems. The survey consists of 22 quasar fields …
View article: Galaxy Spectra Networks (GaSNet). III. Generative pre-trained network for spectrum reconstruction, redshift estimate and anomaly detection
Galaxy Spectra Networks (GaSNet). III. Generative pre-trained network for spectrum reconstruction, redshift estimate and anomaly detection Open
Classification of spectra (1) and anomaly detection (2) are fundamental steps to guarantee the highest accuracy in redshift measurements (3) in modern all-sky spectroscopic surveys. We introduce a new Galaxy Spectra Neural Network (GaSNet-…
View article: MusE GAs FLOw and Wind (MEGAFLOW) XIII. Cool gas traced by MgII around isolated galaxies
MusE GAs FLOw and Wind (MEGAFLOW) XIII. Cool gas traced by MgII around isolated galaxies Open
The circumgalactic medium (CGM) is a key component needed to understand the physical processes governing the flows of gas around galaxies. Quantifying its evolution and its dependence on galaxy properties is particularly important for our …
View article: MUSEQuBES: Connecting HI absorption with Ly$α$ emitters at $z \approx 3.3$
MUSEQuBES: Connecting HI absorption with Ly$α$ emitters at $z \approx 3.3$ Open
We present a comprehensive analysis of HI absorption around 96 lya emitters (LAEs) at $z\approx3.3$ (median lya luminosity $\approx10^{42}$ erg.s$^{-1}$). These LAEs were identified within 8 MUSE fields, each $1'\times1'$ on the sky and ce…
View article: MusE GAs FLOw and Wind (MEGAFLOW) XII. Rationale and design of a MgII survey of the cool circum-galactic medium with MUSE and UVES: The MEGAFLOW Survey
MusE GAs FLOw and Wind (MEGAFLOW) XII. Rationale and design of a MgII survey of the cool circum-galactic medium with MUSE and UVES: The MEGAFLOW Survey Open
We present the design, rationale, properties and catalogs of the MusE Gas FLOw and Wind survey (MEGAFLOW), a survey of the cool gaseous halos of $z\sim1$ galaxies using low-ionization MgII absorption systems. The survey consists of 22 quas…
View article: MUSEQuBES: The column density, covering fraction, and mass of OVI-bearing gas in and around low-redshift galaxies
MUSEQuBES: The column density, covering fraction, and mass of OVI-bearing gas in and around low-redshift galaxies Open
We present a study of OVI-bearing gas around 247 low-mass (median log(M*/Msun)~8.7) galaxies at low redshifts (0.1 < z < 0.7) using background quasars as part of the MUSE Quasar-fields Blind Emitters Survey (MUSEQuBES). We find that the av…
View article: The Blue Multi Unit Spectroscopic Explorer (BlueMUSE) on the VLT: science drivers and overview of instrument design (Erratum)
The Blue Multi Unit Spectroscopic Explorer (BlueMUSE) on the VLT: science drivers and overview of instrument design (Erratum) Open
International audience
View article: A galactic outflow traced by its extended Mg II emission out to a $\sim30$ kpc radius in the Hubble Ultra Deep Field with MUSE
A galactic outflow traced by its extended Mg II emission out to a $\sim30$ kpc radius in the Hubble Ultra Deep Field with MUSE Open
We report the discovery of a rare Mg II $λ$$λ$ 2796, 2803 doublet emission halo around a star forming galaxy with $\log (M_\star$/M$_\odot) = 10.3 \pm 0.3$ at $z=0.737$ in deep (9.94 h) VLT/MUSE data from the MUSE-HUDF mosaic. While the ce…
View article: Galaxy Spectra neural Network (GaSNet). II. Using deep learning for spectral classification and redshift predictions
Galaxy Spectra neural Network (GaSNet). II. Using deep learning for spectral classification and redshift predictions Open
The size and complexity reached by the large sky spectroscopic surveys require efficient, accurate, and flexible automated tools for data analysis and science exploitation. We present the Galaxy Spectra Network/GaSNet-II, a supervised mult…
View article: Stellar angular momentum of intermediate-redshift galaxies in MUSE surveys
Stellar angular momentum of intermediate-redshift galaxies in MUSE surveys Open
We quantify the stellar rotation of galaxies by computing the λ R parameter, a proxy for the stellar angular momentum in a sample of 106 intermediate-redshift galaxies (0.1 < z < 0.8). The sample is located in the CANDELS/GOODS-S and CANDE…
View article: MusE GAs FLOw and Wind (MEGAFLOW)
MusE GAs FLOw and Wind (MEGAFLOW) Open
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 outflow velocity V out , mass ejection ra…
View article: Stellar angular momentum of intermediate redshift galaxies in MUSE surveys
Stellar angular momentum of intermediate redshift galaxies in MUSE surveys Open
We quantify the stellar rotation of galaxies by computing the $λ_{R}$ parameter, a proxy for the stellar angular momentum in a sample of 106 galaxies with redshift 0.1 $<$ z $<$ 0.8 and stellar masses from $\sim$10$^{7.5}$ to 10$^{11.8}$ M…
View article: The effect of cosmic rays on the observational properties of the CGM
The effect of cosmic rays on the observational properties of the CGM Open
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 galactic nuclei. Observations of such outflows via abso…
View article: The Wide-field Spectroscopic Telescope (WST) Science White Paper
The Wide-field Spectroscopic Telescope (WST) Science White Paper Open
The Wide-field Spectroscopic Telescope (WST) is proposed as a new facility dedicated to the efficient delivery of spectroscopic surveys. This white paper summarises the initial concept as well as the corresponding science cases. WST will f…
View article: Large-scale excess H <scp>i</scp> absorption around <i>z</i> ≈ 4 galaxies detected in a background galaxy spectrum in the MUSE eXtremely deep field
Large-scale excess H <span>i</span> absorption around <i>z</i> ≈ 4 galaxies detected in a background galaxy spectrum in the MUSE eXtremely deep field Open
Observationally mapping the relation between galaxies and the intergalactic medium (IGM) is of key interest for studies of cosmic reionization. Diffuse hydrogen gas has typically been observed in H i Lyman-α (Lyα) absorption in the spectra…
View article: EMPRESS. XII. Statistics on the Dynamics and Gas Mass Fraction of Extremely Metal-poor Galaxies
EMPRESS. XII. Statistics on the Dynamics and Gas Mass Fraction of Extremely Metal-poor Galaxies Open
We present the demography of the dynamics and gas mass fraction of 33 extremely metal-poor galaxies (EMPGs) with metallicities of 0.015–0.195 Z ⊙ and low stellar masses of 10 4 –10 8 M ⊙ in the local universe. We conduct deep optical integ…
View article: The sinfoni Mg II program for line emitters (simple): Discovering starbursts near QSO sight lines
The sinfoni Mg II program for line emitters (simple): Discovering starbursts near QSO sight lines Open
Low-ionization transitions such as the Mg II gamma 2796/2803 doublet trace cold gas in the vicinity of galaxies. It is not clear whether this gas is part of the interstellar medium of large protodisks, part of dwarfs, or part of entrained …
View article: Possible signatures of a cold-flow disk from muse using a z ~ to 1 galaxy-quasar pair toward SDSS J1422-0001
Possible signatures of a cold-flow disk from muse using a z ~ to 1 galaxy-quasar pair toward SDSS J1422-0001 Open
We use a background quasar to detect the presence of circumgalactic gas around a z = 0.91 low-mass star-forming galaxy. Data from the new Multi Unit Spectroscopic Explorer (MUSE) on the Very Large Telescope show that the galaxy has a dust-…
View article: MAGIC: MUSE gAlaxy Groups In COSMOS – A survey to probe the impact of environment on galaxy evolution over the last 8 Gyr
MAGIC: MUSE gAlaxy Groups In COSMOS – A survey to probe the impact of environment on galaxy evolution over the last 8 Gyr Open
Context. Galaxies migrate along filaments of the cosmic web from small groups to clusters, which creates the appearance that the evolution of their properties speeds up as environments get denser. Aims. We introduce the M USE gAlaxy Groups…
View article: MusE GAs FLOw and Wind (MEGAFLOW) X. The cool gas and covering fraction of Mg <scp>ii</scp> in galaxy groups
MusE GAs FLOw and Wind (MEGAFLOW) X. The cool gas and covering fraction of Mg <span>ii</span> in galaxy groups Open
We present a study of the cool gas (≈104 K) traced by Mg ii absorptions around groups of galaxies in the MEGAFLOW (MusE GAs FLOw and Wind) survey. Using a combination of two algorithms, we blindly identify 32 groups of more than 5 galaxies…
View article: MusE GAs FLOw and Wind (MEGAFLOW) X. The cool gas and covering fraction of MgII in galaxy groups
MusE GAs FLOw and Wind (MEGAFLOW) X. The cool gas and covering fraction of MgII in galaxy groups Open
We present a study of the cool gas ($\approx 10^4$ K) traced by MgII absorptions around groups of galaxies in the MEGAFLOW survey. Using a combination of two algorithms we blindly identify 32 groups of more than 5 galaxies at $0.3 < z < 1.…
View article: MAGIC: Muse gAlaxy Groups In Cosmos -- A survey to probe the impact of environment on galaxy evolution over the last 8 Gyr
MAGIC: Muse gAlaxy Groups In Cosmos -- A survey to probe the impact of environment on galaxy evolution over the last 8 Gyr Open
We introduce the MUSE gAlaxy Groups in COSMOS (MAGIC) survey, which was built to study the impact of environment on galaxy evolution over the last 8 Gyr. It consists of 17 MUSE fields targeting 14 massive structures at intermediate redshif…
View article: Galaxy Spectra neural Network (GaSNet). II. Using Deep Learning for Spectral Classification and Redshift Predictions
Galaxy Spectra neural Network (GaSNet). II. Using Deep Learning for Spectral Classification and Redshift Predictions Open
Large sky spectroscopic surveys have reached the scale of photometric surveys in terms of sample sizes and data complexity. These huge datasets require efficient, accurate, and flexible automated tools for data analysis and science exploit…
View article: The MUSE-Faint survey
The MUSE-Faint survey Open
Aims. We use the stellar line-of-sight velocities of Antlia B (Ant B), a faint dwarf galaxy in the NGC 3109 association, to derive constraints on the fundamental properties of scalar field dark matter (SFDM), which was originally proposed …