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The diversity of galaxies in the low surface brightness Universe Abstract Recent advances in imaging capabilities have transformed our understanding of galaxies at the low surface brightnesses frontier, unveiling a new population of ever smaller "ultra-faint" dwarf galaxies, and more and...
Dark matter: 'real stuff' or gravity misunderstood? AbstractFor almost a century, astronomers have been in conflict about the mysterious nature of dark matter. Is the additional mass that we observe in the Universe ‘real’, or is it the result of deviations from the laws of gravity as we...
Galaxy Modelling Tools: From mock catalogues, spurious parallaxsolutions and chemical evolution Abstract With each data release the Gaia mission provides us with more observational constraints of the Milky Way. What we are able to infer from these is limited by our ability to model and...
Linking small scales structures with global properties of the Milky Way AbstractThe advent of the Gaia data, in particular its 6D sample, has finally allowed us to precisely characterise the kinematic space throughout a significant portion of the Milky Way disc(s). In doing so, we are now able...
Extreme galaxies in fundamental scaling relations AbstractI will discuss two of the most important scaling laws for disc galaxies: the baryonic Tully-Fisher relation (BTFR) and the specific angular momentum-mass relation. Specifically, I will focus on the location of rather extreme galaxy...
The Gaia promise of a comprehensive chemo-dynamical view of our Galaxy AbstractESA published Gaia eDR3 on December 3, and Gaia DR3 is about a year away. Gaia DR3 promises us data to construct the most detailed view of the chemo-dynamics of field star populations in our Galaxy. I will present...
A Self-Consistent Treatment of Dynamical Friction: New Insights into Core Stalling and Dynamical Buoyancy AbstractDynamical friction is typically regarded as a secular process, in which the subject (`perturber’) inspirals very slowly (secular approximation), and has been introduced to the...
Molecular component in ram pressure stripped tails of cluster galaxies AbstractIn recent years, numerous cluster galaxies with tails of ram pressurestripped (RPS) gas have been discovered, many containing young stars.These are dramatic examples of galaxy evolution driven by the...
Weighing the Galactic disk using phase-space spirals AbstractWe have developed a new method for inferring the gravitational potential of the Galactic disk, using the time-varying structure of a phase-space spiral in the plane of vertical position and vertical velocity. Our method of...
Non-Cold Dark Matter: Particle Physics versus Cosmology AbstractDark matter should represent 80% of the matter content of the Universe, yet its fundamental nature is still unknown. Even though the LambdaCDM model, with CDM for Cold dark matter, provides a very good fit to cosmological data,...