© 2025 Observatoire Astronomique de Strasbourg | Webdesign et développement Alchimy.
"Stochastic gravitational wave backgrounds from primordial black holes" The first detection of gravitational waves by LIGO in 2015 opened a new window of observation to the Universe and gave rise to a wide variety of research avenues. In this seminar, I will introduce gravitational waves with a...
"An astrophysicist's nightmare: When we thought we understood it all, the Universe chose to disagree" Star clusters, large groups of up to millions of stars, are the basic building blocks of the galaxies in which they are formed and evolve. Understanding star cluster formation and evolution is...
"Unravelling the formation of globular clusters in low-metallicity environments" James Webb Space Telescope has now started to uncover the first proto-globular clusters (GCs) that emerged during the Cosmic Dawn. These clusters were compact (effective radii ~parsecs) and exhibited extreme...
"Understanding the accretion history of our Galaxy through the lens of globular clusters" In the context of the hierarchical formation of galaxies, the search for galaxies accreted by the Milky Way has been a subject of study for decades. The main focus of this research is on Galactic globular...
"Exploring the Epoch of Reionization with Scattering Transforms" Scattering transforms have proven to be a powerful statistical tool for characterizing non-Gaussian processes across various astrophysical contexts. In this presentation, we extend their application to the 21cm signal from the...
"Modeling interstellar dust" Interstellar dust has long been modeled with separate silicate and graphite/amorphous carbon components. In this talk, I will argue that initially distinct populations of carbonaceous and silicate stardust get rapidly homogenized in the interstellar medium (ISM)...
"Exploring the magnetic field properties of the Mpc-scale jet plasma in OJ287" The BL Lacerta object OJ287 , located at z = 0.306 is a very unusual object, as it is suspected of hosting a binary black hole system which powers a relativistic blazar jet. New LOFAR observations of this source,...
"Four ways of looking at the radial acceleration relation" The radial acceleration relation (RAR) is a strong correlation of late-type galaxy dynamics, seeming to describe a mysterious link between baryonic and total dynamical mass. Its properties are so striking that it has even been argued...
"A Non-Gaussian Universe?" Modifying the unconstrained small-scale initial conditions of the Universe could be a game changer for our understanding of cosmic structure formation and address challenges in small-scale galaxy formation. In this talk, I will present you my investigations of the...
"Using e-MERLIN to investigate the radio emission in nearby galaxies from AGN to star formation" The nearby Universe (<150 Mpc) is rich with all types of galaxies, active galactic nuclei (AGN) and star formation (SF). Many of these galaxies have been the subject of large programmes in...