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

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Organization of the laboratory

par Elise blanchard - publié le

LERMA’s Organizational Entities :

  • The management team : composed of the Unit Director, the 2 Assistant Directors, the Technical Director and the Administrator.

Unit Director : Benoit SEMELIN

Assistant Director : Martina WIEDNER

Assistant Director : Ludovic PETITDEMANGE

Technical Director : Jean-Michel KRIEG

Administrator : Murielle CHEVRIER

The management team can be reached at : direction.lerma@obspm.fr

  • The Laboratory Council : is the statutory body of a Research Unit. It is chaired by the Unit Director and is composed of ex-officio, elected and appointed members. It deals with all aspects of the life of the laboratory.

The Laboratory Council meets several times a year. Following each meeting, a report with the main points of discussion is drawn up. After validation by the members of the Council, these minutes are circulated to the whole laboratory.

  • The Scientific Council : its mission is to advise the Unit Director in the scientific choices relating to the prospective, creation, life and suppression of research themes and projects as well as the follow-up of the operations selected (financing, technical support, progress). The work of the SC must guide the management in its decision-making and scientific choices.

  • The administrative team : consists of 6 agents. It works closely with the administrative services of the CNRS (Ile de France-Meudon delegation (DR5) and INSU), the Paris Observatory (OP), Sorbonne University (SU) and Cergy Paris University (CYU).

LERMA’s administrative team supports research activities by ensuring the administrative management of permanent and temporary staff, the financial management of all allocated funds and the monitoring of research contracts.

Organization charts :

Technical organization chart

Administrative organization chart

Computer organization chart

Séminaires à venir

Vendredi 26 février 2021, 14h00
Téléconférence via Zoom,
Morphological Transformations and Quenching in Galaxies : from Simulations to Observations
LERMA-Observatoire de Paris-PSL
résumé :
The origins of the relation between galaxy structure and star formation is still debated. I will discuss recent efforts to advance in our understanding of how massive galaxies change their morphology and quench from z~3. Using several state of the art deep learning techniques, we try to link hydrodynamic cosmological simulations with observations from deep surveys to constrain the physical conditions and evolutionary tracks of galaxies.

Vendredi 5 mars 2021, 14h00
Visioconférence via Zoom,
Laboratory astrophysics studies of VUV and X-ray induced photodesorption from interstellar ice analogues
Mathieu BERTIN
résumé :
The recent advances in space and ground based telescopes (ALMA, NOEMA…) have allowed the detection of more and more molecules in the gas phase in the coldest regions of the interstellar medium - ISM (star-forming regions, protoplanetary disks…). The puzzling detection of these gaseous species, including small organic molecules, in media where the temperature is very low (~ 10-100 K), is currently a major and still open question, directly linked to the astrochemical richness. Most of the observed molecules are indeed expected to either directly form or accrete on the surface of dust grains, and cannot thermally desorb in the regions where they are detected. Their observation requires thus non-thermal desorption processes, among which the desorption induced by UV or X-ray photons – so-called photodesorption – is a promising candidate. However, its role still needs to be clarified, especially in the case of the desorption of small organics molecules for which both the quantitative yields and the underlying mechanisms are lacking.

I will present the outcomes of recent laboratory astrophysics studies base on the use of the monochromatic and tunable synchrotron radiation, dedicated to understand and quantify the photodesorption processes in both the vacuum UV (7-13,6 eV) and soft X-rays (500 – 1500 eV) energy ranges. The role played by the photon energy and of the molecular ice composition on the desorption yields will be highlighted, and a special focus will be made on the case of photodesorption of complex organics molecules.

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