The GEPI (Galaxies, Etoiles, Physique et Instrumentation - Galaxies, Stars, Physics and Instrumentation) is a department of the Paris Observatory, a unité mixte de recherche du Centre national de la recherche scientifique - National Centre for Scientific Research CNRS (UMR 8111) and is associated with the Paris-Diderot University.
- Director : Piercarlo Bonifacio
- Deputy director: Pascal Jagourel
- Administrator : Sabine Kimmel
Stellar physics, physics of the Galaxy, the interstellar medium, galactic physics, formation and evolution of galaxies, preparation of ESA’s Gaia mission, ground based optical and infrared instrumentation (ESO, VLT, E-ELT), low frequency radio instrumentation (LOFAR, SKA).
Personnel (30th June 2012)
- Permanent researchers: 24
- Permanent ITAs : 49
- Post-Docs/CDDs : 7
- Ph.D. students: 10
- A wide-ranging ESO programme « IMAGES » (PI F. Hammer.) using the Giraffe instrument at the VLT.
- Phase A study for multi object spectrographic instruments for use at the E-ELT telescope: EAGLE (PI-ship LAM) and OPTIMOS-EVE (PI-ship GEPI).
- The reference catalogue of measurements of the distances of early type galaxies in the Virgo cluster (Mei et al 2007 ; ApJ, 655, 144) and 15 publications in the context of the ACS VCS et FCS collaborations plus over 700 citations).
- Complete study of a spectrographic instrument (GYES ; PIship GEPI) destined for ground based tracking (at the CFHT) of the GAIA satellite. This study has found an application in the framework of the 4MOST instrument (ESO, PIship AIP)
- Studies of low metallicity stars; the discovery of the "record holding" star (Caffau et al. 2011) was the result of an ongoing effort which has produced 24 articles and over 700 citations suring the period 2007-20012.
- The measurement of the diffuse galactic Ly-alpha emission (Lallement et al. 2011).