P. Jablonka
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View article: Large-Scale Structure in COSMOS-Web: Tracing Galaxy Evolution in the Cosmic Web up to $z \sim 7$ with the Largest JWST Survey
Large-Scale Structure in COSMOS-Web: Tracing Galaxy Evolution in the Cosmic Web up to $z \sim 7$ with the Largest JWST Survey Open
We present a reconstruction of the large-scale structure using the James Webb Space Telescope's (JWST) COSMOS-Web program to trace environmentally driven galaxy evolution up to $z\sim7$. We applied a weighted kernel density estimation meth…
View article: Galaxies in the simulated cosmic web
Galaxies in the simulated cosmic web Open
As the environment harbouring the majority of galaxies, filaments are thought to play a key role in the co-evolution of galaxies and the cosmic web. In this first part of a series to understand the link between galaxies and filaments throu…
View article: Euclid preparation. Establishing the quality of the 2D reconstruction of the filaments of the cosmic web with DisPerSE using Euclid photometric redshifts
Euclid preparation. Establishing the quality of the 2D reconstruction of the filaments of the cosmic web with DisPerSE using Euclid photometric redshifts Open
Cosmic filaments are prominent structures of the matter distribution of the Universe. Modern detection algorithms are an efficient way to identify filaments in large-scale observational surveys of galaxies. Many of these methods were origi…
View article: A Pristine-UNIONS view on the Galaxy: Kinematics of the distant spur feature of the Sagittarius stream traced by blue horizontal branch stars
A Pristine-UNIONS view on the Galaxy: Kinematics of the distant spur feature of the Sagittarius stream traced by blue horizontal branch stars Open
Context. Providing a detailed picture of the Sagittarius stream offers important constraints on the build-up of the Galactic halo as well as its gravitational potential at large radii. While several attempts have been made to model the str…
View article: JWST Reveals a Likely Jellyfish Galaxy at z=1.156
JWST Reveals a Likely Jellyfish Galaxy at z=1.156 Open
We report the discovery of COSMOS2020-635829 as a likely jellyfish galaxy undergoing to ram pressure stripping in a (proto)cluster at $z > 1$. High-resolution imaging from the James Webb Space Telescope reveals a symmetric stellar disk cou…
View article: The Pristine Inner Galaxy Survey (PIGS)
The Pristine Inner Galaxy Survey (PIGS) Open
Context . The Sagittarius dwarf spheroidal galaxy (Sgr dSph) is a satellite orbiting the Milky Way that has experienced multiple stripping events due to tidal interactions with our Galaxy. Its accretion history has led to a distinct stella…
View article: The Pristine Dwarf-Galaxy survey
The Pristine Dwarf-Galaxy survey Open
Aims. The Milky Way has a large population of dwarf galaxy satellites. Their properties are sensitive to both cosmology and the physical processes underlying galaxy formation, but these properties are still not properly characterised for t…
View article: Molecular gas in cool-core brightest cluster galaxies at <i>z</i> ≃ 0.4
Molecular gas in cool-core brightest cluster galaxies at <i>z</i> ≃ 0.4 Open
The brightest cluster galaxies (BCGs) of today are passive and very massive galaxies at the center of their clusters. They still accrete mass by swallowing companions and flows of cold gas, processes which are regulated by radio-mode activ…
View article: Virgo Filaments. V. Disrupting the Baryon Cycle in the NGC 5364 Galaxy Group
Virgo Filaments. V. Disrupting the Baryon Cycle in the NGC 5364 Galaxy Group Open
The Virgo Filament Survey (VFS) is a comprehensive study of galaxies that reside in the extended filamentary structures surrounding the Virgo Cluster, out to 12 virial radii. The primary goal is to characterize all of the dominant baryonic…
View article: The Pristine Dwarf-Galaxy survey -- VI. A VLT/FLAMES spectroscopic study of the dwarf galaxy Boötes II
The Pristine Dwarf-Galaxy survey -- VI. A VLT/FLAMES spectroscopic study of the dwarf galaxy Boötes II Open
The Milky Way has a large population of dwarf galaxy satellites. Their properties are sensitive to both cosmology and the physical processes underlying galaxy formation, but these properties are still not properly characterized for the ent…
View article: Joint multiband deconvolution for Euclid and Vera C. Rubin images
Joint multiband deconvolution for Euclid and Vera C. Rubin images Open
With the advent of surveys like Euclid and Vera C. Rubin, astrophysicists will have access to both deep, high-resolution images and multiband images. However, these two types are not simultaneously available in any single dataset. It is th…
View article: <i>Euclid</i>: Early Release Observations – Overview of the Perseus cluster and analysis of its luminosity and stellar mass functions★
<i>Euclid</i>: Early Release Observations – Overview of the Perseus cluster and analysis of its luminosity and stellar mass functions★ Open
The Euclid Early Release Observations (ERO) programme targeted the Perseus cluster of galaxies, gathering deep data in the central region of the cluster over 0.7 deg 2 , including the cluster core up to 0.25 r 200 . The dataset reaches a p…
View article: <i>Euclid</i>: Early Release Observations – Programme overview and pipeline for compact- and diffuse-emission photometry
<i>Euclid</i>: Early Release Observations – Programme overview and pipeline for compact- and diffuse-emission photometry Open
The Euclid Early Release Observations (ERO) showcase Euclid ’s capabilities in advance of its main mission by targeting 17 astronomical objects, including galaxy clusters, nearby galaxies, globular clusters, and star-forming regions. A tot…
View article: <i>Euclid</i>: Early Release Observations – Dwarf galaxies in the Perseus galaxy cluster
<i>Euclid</i>: Early Release Observations – Dwarf galaxies in the Perseus galaxy cluster Open
We make use of the unprecedented depth, spatial resolution, and field of view of the Euclid Early Release Observations (EROs) of the Perseus galaxy cluster to detect and characterise the dwarf galaxy population in this massive system. Usin…
View article: COSMOS-Web: The Role of Galaxy Interactions and Disk Instabilities in Producing Starbursts at <i>z</i> < 4
COSMOS-Web: The Role of Galaxy Interactions and Disk Instabilities in Producing Starbursts at <i>z</i> < 4 Open
We study of the role of galaxy–galaxy interactions and disk instabilities in producing starburst activity in galaxies out to z = 4. For this, we use a sample of 387 galaxies with robust total star formation rate measurements from Herschel,…
View article: Galaxies in the simulated cosmic web: I. Filament identification and their properties
Galaxies in the simulated cosmic web: I. Filament identification and their properties Open
As the environment harbouring the majority of galaxies, filaments are thought to play a key role in the co-evolution of galaxies and the cosmic web. In this first part of a series to understand the link between galaxies and filaments throu…
View article: An Indication of Gas Inflow in Clumpy Star-forming Galaxies near <i>z</i> ∼ 1: Lower Gas-phase Metallicities in Clumpy Galaxies Compared to Nonclumpy Galaxies
An Indication of Gas Inflow in Clumpy Star-forming Galaxies near <i>z</i> ∼ 1: Lower Gas-phase Metallicities in Clumpy Galaxies Compared to Nonclumpy Galaxies Open
Despite the ubiquity of clumpy star-forming galaxies at high-redshift, the origin of clumps are still largely unconstrained due to the limited observations that can validate the mechanisms for clump formation. We postulate that if clumps f…
View article: Virgo Filaments. IV. Using WISE to Measure the Modification of Star-forming Disks in the Extended Regions Around the Virgo Cluster
Virgo Filaments. IV. Using WISE to Measure the Modification of Star-forming Disks in the Extended Regions Around the Virgo Cluster Open
Recent theoretical work and targeted observational studies suggest that filaments are sites of galaxy preprocessing. The aim of the WISESize project is to directly probe galaxies over the full range of environments to quantify and characte…
View article: The Pristine Inner Galaxy Survey (PIGS) XI: Revealing the chemical evolution of the interacting Sagittarius dwarf galaxy
The Pristine Inner Galaxy Survey (PIGS) XI: Revealing the chemical evolution of the interacting Sagittarius dwarf galaxy Open
The Sagittarius dwarf spheroidal galaxy (Sgr dSph) is a satellite orbiting the Milky Way that has experienced multiple stripping events due to tidal interactions with our Galaxy. Its accretion history led to a distinct stellar overdensity,…
View article: Virgo Filaments IV: Using WISE to Measure the Modification of Star-Forming Disks in the Extended Regions Around the Virgo Cluster
Virgo Filaments IV: Using WISE to Measure the Modification of Star-Forming Disks in the Extended Regions Around the Virgo Cluster Open
Recent theoretical work and targeted observational studies suggest that filaments are sites of galaxy preprocessing. The aim of the WISESize project is to directly probe galaxies over the full range of environments to quantify and characte…
View article: An Indication of Gas Inflow in Clumpy Star-Forming Galaxies near $z\sim1$: Lower Gas-Phase Metallicities in Clumpy Galaxies Compared to Non-Clumpy Galaxies
An Indication of Gas Inflow in Clumpy Star-Forming Galaxies near $z\sim1$: Lower Gas-Phase Metallicities in Clumpy Galaxies Compared to Non-Clumpy Galaxies Open
Despite the ubiquity of clumpy star-forming galaxies at high-redshift, the origin of clumps are still largely unconstrained due to the limited observations that can validate the mechanisms for clump formation. We postulate that if clumps f…
View article: The Pristine survey
The Pristine survey Open
We used the spectro-photometric information of ∼219 million stars from Gaia ’s Data Release 3 (DR3) to calculate synthetic, narrowband, metallicity-sensitive CaHK magnitudes that mimic the observations of the Pristine survey, a survey of p…
View article: Loki: an ancient system hidden in the Galactic plane?
Loki: an ancient system hidden in the Galactic plane? Open
We analyse high-resolution ESPaDOnS/CFHT spectra of 20 very metal-poor stars ([Fe/H]~$<-2.0$) in the solar neighbourhood (within $\sim2$ kpc) selected to be on planar orbits (with a maximum height of $\lesssim4$ kpc). Targets include 11 pr…
View article: Virgo Filaments. III. The gas content of galaxies in filaments as predicted by the GAEA semi-analytic model
Virgo Filaments. III. The gas content of galaxies in filaments as predicted by the GAEA semi-analytic model Open
Galaxy evolution depends on the environment in which galaxies are located. The various physical processes (ram-pressure stripping, tidal interactions, etc.) that can affect the gas content in galaxies have different efficiencies in differe…
View article: <i>Euclid</i>: Early Release Observations – Deep anatomy of nearby galaxies
<i>Euclid</i>: Early Release Observations – Deep anatomy of nearby galaxies Open
Euclid is poised to make significant advances in the study of nearby galaxies in the Local Universe. Here we present a first look at six galaxies observed for the Nearby Galaxy Showcase as part of the Euclid Early Release Observations acqu…
View article: Virgo Filaments
Virgo Filaments Open
Galaxy evolution depends on the environment in which galaxies are located. The various physical processes (ram-pressure stripping, tidal interactions, etc.) that are able to affect the gas content in galaxies have different efficiencies in…
View article: The Pristine Inner Galaxy Survey (PIGS)
The Pristine Inner Galaxy Survey (PIGS) Open
The most metal-poor stars provide valuable insights into the early chemical enrichment history of a system, carrying the chemical imprints of the first generations of supernovae. The most metal-poor region of the Sagittarius dwarf galaxy r…
View article: Ground-based image deconvolution with Swin Transformer UNet
Ground-based image deconvolution with Swin Transformer UNet Open
Aims . As ground-based all-sky astronomical surveys will gather millions of images in the coming years, a critical requirement emerges for the development of fast deconvolution algorithms capable of efficiently improving the spatial resolu…
View article: Euclid: Early Release Observations -- Dwarf galaxies in the Perseus galaxy cluster
Euclid: Early Release Observations -- Dwarf galaxies in the Perseus galaxy cluster Open
We make use of the unprecedented depth, spatial resolution, and field of view of the Euclid Early Release Observations of the Perseus galaxy cluster to detect and characterise the dwarf galaxy population in this massive system. The Euclid …
View article: COSMOS-Web: The Role of Galaxy Interactions and Disk Instabilities in Producing Starbursts at z<4
COSMOS-Web: The Role of Galaxy Interactions and Disk Instabilities in Producing Starbursts at z<4 Open
We study of the role of galaxy-galaxy interactions and disk instabilities in producing starburst activity in galaxies out to z = 4. For this, we use a sample of 387 galaxies with robust total star formation rate measurements from Herschel,…