Séminaires

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6 octobre 2023

Séminaire – Jérôme Novak (LUTH)

Physics of neutron stars: numerical simulations and multi-messenger signals Abstract Neutron stars are born in core-collapse supernova events with the collapse of the iron core of massive main-sequence stars, leading to an explosion of the outer layers. This produces a hot proto-neutron...

29 septembre 2023

Séminaire – Clément Stahl (ObAS)

A small practical tutorial for cosmological N-body simulations Abstract Clément Stahl will give a small tutorial on generating cosmological initial conditions and running a simple N-body simulation of structure formation. This tutorial will first feature a theoretical overview of the field...

22 septembre 2023

Séminaire – Gergö Popping (ESO)

Dust and metals in galaxies at Cosmic Noon Abstract At the peak epoch of cosmic star formation activity, z ∼ 2, the obscured star-formation rate (SFR) density of our Universe traced by infrared light is ∼ 4 to 8 times higher than the unobscured SFR density traced by the UV luminosity....

15 septembre 2023

Séminaire – Jean-Baptiste Durrive (IRAP)

(M)HD turbulence synthesis for astrophysics Abstract An analytical model for 3D incompressible turbulence was recently introduced in the hydrodynamics community which, with only a few parameters, shares many properties of experimental and numerical turbulence. In our work, we extend this...

8 septembre 2023

Séminaire – Anna Genina (MPA Garching)

On the Edge: the relation between stellar and dark matter halos of Milky Way-mass galaxies Abstract I will discuss the predictions of the Cold Dark Mater model on the build-up of stellar and dark matter halos of Milky Way-mass galaxies. I will show that the stellar and dark matter halos...

30 juin 2023

Séminaire – Alice Zocchi (Wien University)

Morphology and dynamics of globular clusters Abstract Globular clusters have long been considered to be spherically symmetric, isotropic, non-rotating stellar systems. However, this simple picture has been revolutionized by a series of recent discoveries about their kinematic and structural...

16 juin 2023

Séminaire – Minhajur Rahaman (The Open University of Israel)

Internal shocks as a candidate for Prompt Gamma Ray Bursts (GRB)s Abstract Internal shocks are one of the prominent dissipation mechanisms for prompt gamma-ray emission. In internal shocks, each collision between two shells forms a pair of forward and reverse shocks, which dissipate part of...

9 juin 2023

Séminaire – Luis Linan (KU Leuven)

Sun Unleashed: two approaches to predicting solar eruptions Abstract The spectacular phenomena known as solar eruptions can impact human infrastructure. As our society becomes more and more sensitive to solar activity due to the technological evolution, solar forecasting is a growing...

26 mai 2023

Séminaire – David Homan (AIP Postdam)

Extreme variability in active galactic nuclei: detection with eROSITA and results from multi-wavelength follow-up Abstract Active galactic nuclei (AGN) are known to be variable at all wavelengths and on many timescales. Large optical surveys have revealed a small number of AGN that show...

12 mai 2023

Séminaire – Aurelien Barrau (LPSC Grenoble)

Quantum gravity and observations Abstract I will review in a pedagogical way the status of loop quantum gravity and its consequence for cosmology and black hoes. I will conclude by some interesting openings for testing string...