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Particle Physics Division


Institute of Research into the Fundamental Laws of the Universe
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Could the GRB221009A burst of October 9, 2022 be the most violent starburst of our millennium?
May 11, 2023
Could the GRB221009A burst of October 9, 2022 be the most violent starburst of our millennium?
On October 9, 2022, at 13:16 and 59.99 seconds, a gamma-ray burst (GRB) dazzled almost all the X-ray and gamma ray detectors available at the time. Since their discovery, multi-wavelength telescopes in space and on the ground have continuously monitored these events.
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Mar 10, 2022
H.E.S.S. detects a galactic nova.
IRFU scientists and the H.E.S.S. collaboration observe time-dependent particle acceleration in our Galaxy for the first time. Novae are powerful eruptions on the surface of a white dwarf in a binary star system, in which a larger star and a smaller star orbit each other.
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H.E.S.S. detects a galactic nova.
Astro-COLIBRI: a novel platform for real-time multi-messenger astrophysics
Sep 21, 2021
Astro-COLIBRI: a novel platform for real-time multi-messenger astrophysics
After three years of reflection and development, the "Astro-Colibri" application has just been launched. This digital interface, created by researchers at Irfu/DPhP, aims to make information on transient and multi-messenger phenomena easily accessible in real time.
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Jul 23, 2021
Dark matter sub-halos among unidentified Fermi-LAT Objects-looking for UFOs?
Space-based experiments such as the Fermi satellite's Large Area (LAT), which detects gamma rays above 100 MeV, reveal a population of sources with no astrophysical counterpart at other wavelengths.
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Dark matter sub-halos among unidentified Fermi-LAT Objects-looking for UFOs?
Front-row view reveals exceptional cosmic explosion
Jun 04, 2021
Front-row view reveals exceptional cosmic explosion
On 29 August 2019, scientists from the H.E.S.S. collaboration recorded one of the brightest cosmic explosions ever observed in the Universe. This gamma-ray burst emitted the most energetic photons ever detected in this type of event.
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Nov 20, 2019
First detection of gamma-ray burst afterglow in very-high-energy gamma light
After a decade-long search, scientists have for the first time detected a gamma-ray burst in very-high-energy gamma light. This discovery was made in July 2018 by the H.E.S.S. collaboration using the  huge 28-m telescope of the H.E.S.S. array in Namibia.
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First detection of gamma-ray burst afterglow in very-high-energy gamma light
The largest catalog ever published of very high energy gamma ray sources in the Galaxy
Apr 09, 2018
The largest catalog ever published of very high energy gamma ray sources in the Galaxy
The HESS international collaboration, to which CNRS and CEA contribute, has published the results of fifteen years of gamma ray observations of the Milky Way.
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Oct 16, 2017
The fusion of two hyperdense stars makes the Universe resonate
The discovery of a new type of gravitational wave
Using a range of detectors developed with the participation of the CEA, physicists at CEA-Irfu have scrutinized the region from which the gravitational wave was detected on August 17, 2017 by LIGO-VIRGO facilities.
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The fusion of two hyperdense stars makes the Universe resonate

 

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