A5103098635- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Astronomical Observations and Instrumentation
- Astro and Planetary Science
- Calibration and Measurement Techniques
- Atmospheric and Environmental Gas Dynamics
- Impact of Light on Environment and Health
- Astrophysics and Cosmic Phenomena
- Historical and Architectural Studies
- Gamma-ray bursts and supernovae
- Biblical Studies and Interpretation
- Advanced Fluorescence Microscopy Techniques
- Astrophysics and Star Formation Studies
- Remote Sensing in Agriculture
- Historical Astronomy and Related Studies
- Spectroscopy and Laser Applications
Observatoire astronomique de Strasbourg
2022-2025
Université de Strasbourg
2022
Centre National de la Recherche Scientifique
2022
We make use of the unprecedented depth, spatial resolution, and field view Early Release Observations (EROs) Perseus galaxy cluster to detect characterise dwarf population in this massive system. Using a dedicated annotation tool, high-resolution VIS combined VIS+Near Infrared Spectrometer Photometer (NISP) colour images were visually inspected candidates identified. Their morphologies, presence nuclei, their globular (GC) richness assessed, complementing an automatic detection GC...
The characterization of Low Surface Brightness (LSB) stellar structures around galaxies such as tidal debris on-going or past collisions is essential to constrain models galactic evolution. Our goal obtain quantitative measurements LSB identified in deep images samples consisting hundreds galaxies. We developed an online annotation tool that enables contributors delineate the shapes diffuse extended structures, well artefacts foreground structures. All parameters are automatically stored a...
The Euclid ERO programme targeted the Perseus cluster of galaxies, gathering deep data in central region over $0.7 deg^2 $, including core up to 0.25,r_200. dataset reaches a point-source depth IE = 28.0 (YE, 25.3), AB magnitudes at $5,σ$ with FWHM mag arcsec for radially integrated galaxy profiles. exceptional and spatial resolution this wide-field multi-band enable simultaneous detection characterisation both bright galaxies low surface brightness ones, along their globular systems, from...
We study the intracluster light (ICL) and globular clusters (ICGCs) in nearby Perseus galaxy cluster using Euclid's EROs. By modelling isophotal iso-density contours, we map distributions properties of ICL ICGCs out to a radius 600 kpc (~1/3 virial radius) from brightest (BCG). find that central 500 hosts 70000$\pm$2800 GCs $1.6\times10^{12}$ L$_\odot$ diffuse BCG+ICL near-infrared H$_E$. This accounts for 37$\pm$6% cluster's total stellar luminosity within this radius. The share coherent...
We make use of the unprecedented depth, spatial resolution, and field view Euclid Early Release Observations Perseus galaxy cluster to detect characterise dwarf population in this massive system. The high resolution VIS combined VIS+NIR colour images were visually inspected candidates identified. Their morphologies, presence nuclei, their globular (GC) richness assessed, complementing an automatic detection GC candidates. Structural photometric parameters, including filter colours, extracted...
A recent study of the distribution dwarf galaxies in MATLAS sample galaxy groups revealed an excess flattened satellite structures, reminiscent co-rotating planes discovered local Universe. If confirmed, this lends credence to plane-of-satellite problem and further challenges standard model hierarchical structure formation. However, with only photometric data no confirmation membership, could not address full detail. Here we present spectroscopic follow-up observations one most promising...
We study the intracluster light (ICL) and globular clusters (ICGCs) in nearby Perseus cluster of galaxies using Early Release Observations. By modelling isophotal iso-density contours, we mapped distributions properties ICL ICGCs out to radii $200$--$600$\,kpc (up $ virial radius, depending on parameter) from brightest galaxy (BCG). find that central 500\,kpc hosts $70\,000 clusters, $1.7 odot diffuse BCG+ICL near-infrared This accounts for $38 cluster's total stellar luminosity within this...
Extragalactic globular clusters (EGCs) are an abundant and powerful tracer of galaxy dynamics formation, their own formation evolution is also a matter extensive debate. The compact nature means that they hard to spatially resolve thus study outside the Local Group. In this work we have examined how well EGCs will be detectable in images from Euclid telescope, using both simulated pre-launch first early-release observations Fornax cluster. Wide Survey provide high-spatial resolution VIS...
A recent study of the distribution dwarf galaxies in MATLAS sample galaxy groups revealed an excess flattened satellite structures, reminiscent co-rotating planes discovered local Universe. If confirmed, this lends credence to plane-of-satellite problem and further challenges standard model hierarchical structure formation. However, with only photometric data no confirmation membership could not address full detail . Here we present spectroscopic follow-up observations one most promising...
Extragalactic globular clusters (EGCs) are an abundant and powerful tracer of galaxy dynamics formation, their own formation evolution is also a matter extensive debate. The compact nature means that they hard to spatially resolve thus study outside the Local Group. In this work we have examined how well EGCs will be detectable in images from Euclid telescope, using both simulated pre-launch first early-release observations Fornax cluster. Wide Survey provide high-spatial resolution VIS...