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18 February 2020

Dark matter in elliptical galaxies – the case of NGC 3311

Le 29 juin 2018 De 10h30 à 12h00 Tom Richtler Universidad de Concepción   The question whether elliptical galaxies fall onto the same baryonic Tully-Fisher-relation as spiral galaxies, obviously is critical for the universal character of the phenomenology among galaxies....

18 February 2020

Exploring galaxy evolution with deep learning

Le 22 juin 2018 De 10h30 à 12h00 Marc Huertas-Company Observatoire de Paris   Thanks to rapidly improving technology,  astronomy is entering the big data era. New surveys that will be available in 2-5 years will contain multi-wavelength images of billions of galaxies and...

18 February 2020

Astro lunch 19.06.2018

Le 19 juin 2018 De 12h45 à 13h45 Karina Voggel (Utah Uni.)"The hunt for super-massive black holes in UCDs - Stripped nuclei as tracers of the assembly history of a Galaxy Cluster”Abstract: Central super-massive BHs (SMBHS) have been discovered in five high mass ultra-compact...

18 February 2020

Le projet GBAR – principes et implications cosmologiques

Le 15 juin 2018 De 10h30 à 12h00 Paul-Antoine Hervieux & Giovanni Manfredi Université de Strasbourg Depuis son lancement en 2010, notre équipe fait partie du projet international GBAR (Gravitational Behavior of Antihydrogen at Rest, http://gbar.web.cern.ch/) qui vise à mesurer...

18 February 2020

Astro lunch 12.06.2018

Le 12 juin 2018 De 12h45 à 13h45 Frederic Marin (ObAS)An exceptional disclosure of the hidden AGN in NGC 1068 thanks to 50 years of broadband polarimetric observationIn this contribution, I present the first broadband polarization spectrum of an active galactic nuclei (AGN) by...

18 February 2020

Astro lunch 05.06.2018

Le 5 juin 2018 De 12h45 à 13h45 Paolo Bianchini (McMaster University/ObAS)A three-dimensional view of the internal rotation of globular clustersGlobular clusters (GCs) are old stellar systems for long considered spherical and non-rotating. However, in recent years, an...

18 February 2020

Is the FERMI GeV Excess a Dark Matter Signal?

Le 1 juin 2018 De 10h30 à 12h00 Wim de Boer Karlsruhe Institute of Technology   The so-called Fermi-excess in the diffuse Galactic gamma-ray sky is observed as a shift of the maximum in the E^2 weighted gamma-ray spectrum from 0.7 GeV to around 2 GeV. Such a shift can be...

18 February 2020

Astro lunch 29.05.2018

Le 29 mai 2018 De 12h45 à 13h45 François-Xavier Pineau (ObAS) Results of probabilistic cross-matches taking into account photometric parameters. After a brief introduction to the statistical basis and practical limitations of multi-catalogue positional cross-matches, we...

18 February 2020

Stellar populations in the densest stellar systems in the Universe

Le 18 mai 2018 De 10h30 à 12h00 Nikolay Kacharov MPIA Heidelberg   In this talk I will introduce some of the open questions in the field of globular clusters and nuclear star clusters. As one part of the colloquium, I will talk about the multiple populations phenomenon in...