© 2025 Observatoire Astronomique de Strasbourg | Webdesign et développement Alchimy.
Galaxy Clusters in a New Relativistic Theory of Modified Newtonian Dynamics: Preliminary Results Abstract Galaxy clusters are generally accepted to be a problem for Modified Newtonian Dynamics (MOND), since a dark component is still needed to fit galaxy cluster observations. But MOND is a...
Molecular Cloud Evolution as the first step for Star Formation and Galaxy Evolution Abstract Molecular gas and clouds host virtually all star formation, and therefore, their formation and evolution are the first step leading to star formation and galaxy evolution. On the basis of broad...
Formation of black holes in the pair-instability mass gap Abstract In recent years, stellar models of the final phases of very massive stars have shown that pair-instability (PI) is expected to open a gap in the mass spectrum of black holes (BHs) between about 40 – 65 and 120 solar masses...
Accretion of Self-interacting Scalar Field Dark Matter Onto Reissner Nordström Black Holes Abstract Self-interacting scalar field dark matter is a suitable extension of the free case known as Fuzzy dark matter. The interactive case can reproduce the goodness of the free case at both...
Chemical Characterization of the building blocks of the Milky Way Abstract Since galaxy merger and accretion are fundamental processesin galaxy evolution, reconstructing the accretion history is key tounderstanding the evolution of a galaxy. In the Milky Way, we canstudy ancient accretion...
What is the origin of the different kinematic morphologies of early-type galaxies? Abstract Early-type galaxies (i.e. elliptical and lenticular) are divided into slowand fast rotators according to the appearance of their maps ofline-of-sight velocity. Fast rotators show clear ordered...
Prompt cusps of dark matter halos Abstract The onset of the formation of dark matter halos in the early universe was marked by the monolithic collapse of smooth peaks in the density field. This process creates prompt rho ~ r^-1.5 density cusps, which persist largely unaltered through the...
Dust and stars in galaxies: a complex interplay Abstract The complex interplay between dust and stellar emission is reflected by the diversity of situations: the contrast is stricking between organized grand design spirals with regular distributions of each component and...
Probing substructure with cold stellar streams: the diffusion regime Abstract Cold tidal streams from disrupting globular clusters offer a promising probe to constrain substructure (small-scale potential perturbations) in the Milky Way halo, purely gravitationally. While the bulk of the...
Linear stability and linear response of stellar clusters with the matrix method Abstract In the last few decades, observational evidence showed that spheroidal stellar systems of all scales – from the smallest star clusters to the largest galaxies – display significant kinematic...