Events

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Du 22 October 2021 au 22 October 2021

Séminaire – Eleonora Di Valentino (Sheffield)

Cosmological tensions: hints for a new concordance model?  Abstract The Cosmic Microwave Background temperature and polarization anisotropy measurements have provided strong confirmation of the LCDM model of structure formation. Even if this model can explain incredibly well the...

Du 8 October 2021 au 8 October 2021

Séminaire – Martin Rey (Oxford)

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...

Du 1 October 2021 au 1 October 2021

Séminaire – Margot Brouwer (Kapteyn, Groningen)

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...

Du 24 September 2021 au 24 September 2021

Séminaire – Jan Rybizki (MPIA, Heidelberg)

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...

Du 17 September 2021 au 17 September 2021

Séminaire – Pau Ramos (ObAS)

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...

Du 3 September 2021 au 3 September 2021

Séminaire – Pavel Mancera-Piña (Groningen)

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...

Du 25 June 2021 au 25 June 2021

Séminaire – Morgan Fouesneau (MPIA)

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...

Du 18 June 2021 au 18 June 2021

Séminaire – Uddipan Banik (Yale)

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...

Du 11 June 2021 au 11 June 2021

Séminaire – Pavel Jachym (ASCR, R. Tchèque)

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...

Du 4 June 2021 au 4 June 2021

Séminaire – Axel Widmark (Dark Cosmology Centre, Copenhagen)

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...