Seminar

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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...

Du 28 May 2021 au 28 May 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 May 2021 au 21 May 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 May 2021 au 7 May 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...

Du 12 February 2021 au 12 February 2021

Séminaire – François Mernier (ESA/ESTEC)

From stars to large-scale structures: chemical enrichment in the intracluster medium AbstractDespite being the building blocks of rocky planets and even life, metals mostly reside outside galaxies - i.e. within a hot, ionized, X-ray emitting plasma pervading galaxy clusters and groups, and...

Du 5 February 2021 au 5 February 2021

Séminaire – Nicolas Martinet (LAM)

Probing dark energy with cosmic shear AbstractUnderstanding the accelerated expansion of the Universe is one of the most important challenges of modern cosmology. Thanks to the development of large dedicated surveys (Euclid, Rubin/LSST, Roman/WFIRST), weak-lensing cosmic shear offers the...

Du 22 January 2021 au 22 January 2021

Séminaire – Benoît Commerçon (CRAL)

Protostellar disk formation in low- and high-mass star formation AbstractThe new generation of interferometers provide unprecedented constraints on the protostellar disk formation process. Observations indicate that most protostellar disks have a small extent at the Class 0 stage and that disks...