BOSS, eBOSS, DESI
Most of the content of the Universe, about 70%, is dominated by an energetic component that is neither matter nor radiation: dark energy. This mysterious component, first observed in 1998 with supernovae, revolutionized our vision of the evolution of the Universe and is one of the major discoveries of the end of the 20th century.
A characteristic scale of about 500 million light-years, acting as a "standard meter", is present in the distribution of matter on a cosmic scale.
Numerical Simulations in Astrophysics
Web site of the COAST project
Presentation
The COAST project is a DAPNIA program of high performances computing in astrophysics. It includes developments of codes, numerical methods, visualization tools, distributed databases, optimization and parallelization methods.
A new generation observatory to explore the high energy Universe.
Une nouvelle génération d'observatoire pour explorer l'Univers à haute énergie.
Objectives
The goal of Edelweiss is to detect the dark matter of our Galaxy through its interactions in detectors operated in underground laboratory.
The EROS experiment, searching for massive compact objects in our galaxy, showed that at most 7 % of our local missing mass could be accounted for by such objects, that is by ordinary matter.
Tools development to characterize exoplanets’ atmospheres
Gravitational Behaviour of Antihydrogen at Rest
Aims:
One of the fundamental questions of today’s physics concerns the action of gravity upon antimatter. No experimental direct measurement had been successfully performed with antimatter particles in the 2010's. CERN has thus launched a research program with the Antiproton Decelerator (AD) allowing to prepare a measurement of the effect of gravity on antihydrogen atoms.
The primary aim of this experiment is to determine how antimatter reacts to gravity.
Herschel
An Infrared and Sub-millimetre Observatory
The Herschel telescope is a scientific space mission developed by the European Space Agency (ESA) dedicated to observing the Universe in the infrared and sub-millimetre ranges (wavelengths between 60 et 670 µm), a window of the electromagnetic spectrum that is still largely unexplored. It measures 9 m in length, 4 m in diameter and will weigh over 3 metric tons upon launch.
Exploring the High Energy gamma ray sky
H.E.S.S.
Exploring the High Energy gamma ray sky
H.E.S.S stands for "High Energy Stereoscopic System". This telescope system been designed and built by a large international collaboration which includes the DAPNIA as a member. This instrument is dedicated to the observation of high energy gamma ray sources with energies above a few tens of GeV.
The James Webb Space Telescope
The James Webb Space Telescope (JWST) launched on 25 December 2021 is the successor of the Hubble Space Telescope. This is a NASA led mission with the participation of Europe, under the responsibility of the European Space Agency (ESA), and of Canada through the Canadian Space Agency (CSA). The telescope has a collecting area 7 times larger than that of the HST and is dedicated to observe the Universe in the infrared radiation (from 1 to 27 micrometers).
Ab initio modelling of extreme supernova explosions and gamma-ray bursts
Ttitle of ERC project : Exploding stars from first principles: MAGnetars as engines of hypernovae and gamma-ray BURSTs
PI : Jérôme Guilet
Megacam
MegaCam A major instrument at the CFHT observatory (Canada-France-Hawaii Telescope)
The MegaCam camera was developed for the prime focus of the 3.6m diameter Canada-France-Hawaii Telescope (CFHT), on the summit of the Mauna Kea volcano, at an altitude of 4200m on the Big Island of Hawaii (USA).
The PEBBLES project consists of developing an innovative methodology to characterise the properties of dust around very young stars in the process of forming their proto-planetary disks. Dust is one of the key elements in the physical processes regulating the formation of stars and their planetary systems, but recent observations are overturning the models used until now to describe its evolution from submicron grains to pebbles.
A space observatory developed by ESA for the characterization of exo-planetary systems launched in late 2026.
ESA stellar exo-planet system characterization to be launched at the end of 2026.
SNLS aimed at detecting type Ia supernovae at high redshift for cosmological studies. It belongs to the second generation of experiments in that field, launched after the unexpected discovery of the late acceleration of the Universe expansion rate by the first programs of type Ia supernovae at the end of the1990s.
SNLS used the Canada-France-Hawaii telescope (CFHT) of 3.6 m located on the Mauna Kea mountain in Hawaii. It was equipped with MegaCam, the large field CCD camera designed and built at Irfu.
Studying rotation dynamics of magnetic stars and their interaction with their planet system.
SPIRE - Stars: dynamical Processes driving tidal Interactions, Rotation and Evolution
Projet ERC (European Research Council) # 647383
Porteur CEA : S. Mathis
A mission dedicated to the study of gamma ray bursts
A mission dedicated to the study of gamma ray bursts
The SVOM Mission (Space based multi-band astronomical Variable Objects Monitor) is a chinese and french project dedicated to the detection and detailed study of GRBs. The launch of the satellite is planned for the beginning of the next decade.
Transient high energy sky and early universe surveyor
Understanding the physical mechanisms underlying the eruptive activity of the Sun and its stellar twins
An observatory to detect cosmic X-ray radiation
XMM-Newton
An observatory to detect cosmic X-ray radiation
The XMM-Newton observatory (XMM stands for X-ray Multi-Mirror) is a telescope of the European Space Agency (ESA) dedicated to studying the X-ray cosmic radiation. Launched on December 10th, 1999 by an Ariane 5 rocket, XMM-Newton measures 10 m of length, 16 m large, for 4 m of diameter and weigh approximately 3,8 tons.
