Séminaires

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Du 24 septembre 2021 au 24 septembre 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 septembre 2021 au 17 septembre 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 septembre 2021 au 3 septembre 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 juin 2021 au 25 juin 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 juin 2021 au 18 juin 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 juin 2021 au 11 juin 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 juin 2021 au 4 juin 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...

Du 28 mai 2021 au 28 mai 2021

Séminaire – Laura Lopez-Honorez (ULB)

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,...

Du 21 mai 2021 au 21 mai 2021

Séminaire – Neige Frankel (MPIA)

Fitting the Secular Evolution of the Milky Way Disk AbstractDisk galaxies present a great regularity in  their stellar bodies butreveal complex structures in their young stars and gas. The Milky Way isan ideal model organism to study the connection between the highlystructured birth conditions...

Du 7 mai 2021 au 7 mai 2021

Séminaire – Kristiina Verro (Kapteyn)

XSL: a new generation empirical stellar library and stellar population models AbstractWith the next generation wide-field spectroscopic facilities, such asthe upcoming WEAVE for the William Herschel Telescope, and recentadvances in the infrared instruments on large telescopes, such asX-shooter...