Laboratoire d’Études du Rayonnement et de la Matière en Astrophysique et Atmosphères

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Présentations 2018

par Carine Bingan - publié le , mis à jour le

Thèmes abordés lors de la journée des nouveaux arrivants le 19 novembre 2018 :

- Présentation générale du laboratoire (Darek Lis)
- Informations administratives et financières (Murielle Chevrier & Carine Bingan)
- Point Hygiène et Sécurité (Thibaut Vacelet)
- Formation permanente (Patrice Landry et Nora Roger)
- Outils à disposition : support informatique, accès bibliographiques, site web et projets, ressources autres établissements... (Alain Coulais)
- Présentations des pôles scientifiques (Françoise Combes, Thibaut Le Bertre, Christof Janssen, Catherine Prigent)
- Informations sur le système de parrainage pour les doctorants (Martina Wiedner)
- Visite des Laboratoires techniques (Yan Delorme)

LERMA’s general presentation
Administrative informations
Travels and purchases
Security,Health & Safety
IT Support
Professional Training
Pôle1 Galaxies et Cosmologie
Pôle2 Milieu interstellaire & Plasma
Pôle3 Molécules dans l’univers
Pôle4 Instrumentation et télédétection
Student’s Counselling

Séminaires à venir

Vendredi 28 février 2020, 14h00
Salle de l'atelier, Paris
Filament Paradigm and Galactic Star Formation
Shu-ichiro INUTSUKA
Nagoya University
résumé :
Recent observations have emphasized the importance of the formation and evolution of magnetized filamentary molecular clouds in the process of star formation. Theoretical and observational investigations have provided convincing evidence for the formation of molecular cloud cores by the gravitational fragmentation of filamentary molecular clouds. Thus, the mass function and rotations of molecular cloud cores should be directly related to the properties of the filamentary molecular cloud, which determines the initial size and mass distribution of a protoplanetary disk around a protostar created in a core. In this talk I explain our current understanding of the star formation processes in the Galactic disk, and summarize various processes that are required in describing the filamentary molecular clouds to understand the star formation rate/efficiency, the stellar
initial mass function, and the angular momentum distribution of protoplanetary disks in their early evolutionary phase.
Vendredi 20 mars 2020, 14h00
Salle de l'atelier, Paris
The challenges of observing the Epoch of Reionization and Cosmic Dawn
Kateyn institute
résumé :
Low-frequency observations of the redshifted 21cm line promise to open a new window onto the first billion years of cosmic history, allowing us to directly study the astrophysical processes occurring during the Epoch of Reionization (EoR) and the Cosmic Dawn (CD). This exciting goal is challenged by the difficulty of extracting the feeble 21-cm signal buried under astrophysical foregrounds orders of magnitude brighter and contaminated by numerous instrumental systematics. Several experiments such as LOFAR, MWA, HERA, and NenuFAR are currently underway aiming at statistically detecting the 21-cm brightness temperature fluctuations from the EoR and CD. While no detection is yet in sight, considerable progress has been made recently. In this talk, I will review the many challenges faced by these difficult experiments and I will share the latest development of the LOFAR Epoch of Reionization and NenuFAR Cosmic Dawn key science projects.
Vendredi 17 avril 2020, 14h00
Salle de l'atelier, Paris
Patricia TISSERA
Universidad Andres Bello, Santiago, Chili
Vendredi 24 avril 2020, 14h00
Salle de l'atelier, Paris
Philippe ANDRE
Tous les séminaires...