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Division of Electronics, Detectors and Computing for Physics (DEDIP)


Institute of Research into the Fundamental Laws of the Universe
« Projects
The Fermi telescope's third catalog of gamma-ray pulsars
Nov 27, 2023
The Fermi telescope's third catalog of gamma-ray pulsars
The majority of the 3400 known pulsars are "seen" in radio waves, and are located in the Milky Way. The 340 pulsars seen in gamma-rays all share the common feature of being among the 10-15% most powerful pulsars.
An international team led by French researchers, including those at DAp, publishes on November 28, 2023 in the Astrophysical Journal a compilation of 340 pulsars seen in gamma rays (30 MeV - 30 GeV) with the LAT space telescope on NASA's Fermi satellite. Prior to Fermi's launch in 2008, only 11 pulsars were known in gamma rays. This new catalog brings together all the characteristics of all known gamma-ray pulsars.
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May 06, 2022
Hyperfast white dwarfs and stellar explosions
New numerical simulations probe the origin of type Ia supernovae
While type Ia supernovae are considered as highly symmetric supernovae, the explosion in a tight binary system composed of two white dwarfs revises this paradigm. An international team (Japan, Canada, France), including a researcher from the Department of Astrophysics/AIM Laboratory of CEA Paris-Saclay, publishes a study in the Astrophysical Journal that reveals that the distinctive asymmetric structures of such a supernova leave post-mortem imprints on the morphology of the ejected matter.
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Hyperfast white dwarfs and stellar explosions
Kepler under the gamma-ray eye
Feb 17, 2022
Kepler under the gamma-ray eye
The Fermi-LAT space telescope reveals the nature of particles accelerated in this historic supernova remnant.
The explosion of a star produces a shock wave that propagates at more than 5000 km/s for centuries and it is thought that these shocks are the main source of highly energetic particles called cosmic-rays. Studying the high-energy photon emission of supernova remnants allows us to probe the nature of the accelerated particles, their energy and their composition.
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Jun 02, 2020
Birth of a planet
VLT/SPHERE observations of the star AB Aurigae pinpoint a giant planet in formation
Motivated by unusual features recently observed with the ALMA instrument in a proto-planetary disc around the star AB Aurigae, an international team of astrophysicists including a researcher from the Department of Astrophysics / Laboratory AIM of the CEA-Irfu of Paris-Saclay has just obtained a very sharp high-contrast image of a S-shasped sub-structure in the gaseous and dusty disc surrounding the star.
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Birth of a planet
New members in the gamma-ray zoo
May 20, 2020
New members in the gamma-ray zoo
The fourth catalog of Fermi-LAT sources comes on line
The Fermi-LAT collaboration has published its fourth source catalog, named 4FGL. Based on eight years of data, it contains 5064 celestial objects emitting gamma rays at energies around 1 GeV, adding more than 2000 high-energy sources to the previous collection (published in 2015). More than one fourth of the objects are of unknown nature, calling for numerous follow-up studies.
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Dec 14, 2009
The power of a cosmic accelerator brought to light
Microquaser gamma emission observed for the first time
For the first time, the high-energy gamma rays emitted by a microquasar have been spotted with certainty, thanks to NASA's Fermi telescope. The observation of the microquasar Cygnus X-3 by a French team (CEA-IRFU, CNRS-INSU and IN2P3, University of Paris Diderot, Joseph Fourier University) teaches us more about how these particular sources function and how a compact object orbiting a star can hurl a mass equivalent to the Moon's through the interstellar medium at almost the speed of light.
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The power of a cosmic accelerator brought to light
The power of a cosmic accelerator brought to light
Dec 08, 2009
The power of a cosmic accelerator brought to light
Microquaser gamma emission observed for the first time
For the first time, the high-energy gamma rays emitted by a microquasar have been spotted with certainty, thanks to NASA's Fermi telescope. The observation of the microquasar Cygnus X-3 by a French team (CEA-IRFU, CNRS-INSU and IN2P3, University of Paris Diderot, Joseph Fourier University) teaches us more about how these particular sources function and how a compact object orbiting a star can hurl a mass equivalent to the Moon's through the interstellar medium at almost the speed of light.
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