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Particle Physics Division


Institute of Research into the Fundamental Laws of the Universe
« The Particle Physics Division 
ESA adopts LISA mission
Jan 25, 2024
ESA adopts LISA mission
ESA's Scientific Program Committee has adopted the LISA mission, giving the go-ahead for construction of the instrument and satellites. For the first time, LISA will observe the Universe through gravitational waves from space.
ISA (Laser Interferometer Space Antenna), the European Space Agency's large-scale mission to explore the Universe by observing the many sources of gravitational waves, was adopted on Thursday January 25 by ESA's Scientific Programs Committee, meaning that the concept and technology are recognized as sufficiently advanced for construction of the instrument and satellites to begin.
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Jun 12, 2023
DESI collaboration publishes observational data on nearly two million astrophysical objects
To study dark energy, the large Dark Energy Spectroscopic Instrument (DESI) will map over 40 million galaxies. Today, DESI has released its first data and is publishing 15 papers on the scientific study of these data.
The Universe is immensely big, and getting bigger all the time. To study dark energy, the mysterious force behind the accelerating expansion of our Universe, scientists are using the large Dark Energy Spectroscopic Instrument (DESI) survey to map over 40 million galaxies, quasars and stars.
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DESI collaboration publishes observational data on nearly two million astrophysical objects
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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May 17, 2021
Desi starts its large spectroscopic survey for 5 years
After a particularly successful first campaign of tests and measurements, the Dark Energy Spectroscopic Instrument (DESI) has just successfully started its 5-year observing program.
After a particularly successful first campaign of tests and measurements, the Dark Energy Spectroscopic Instrument (DESI) has just successfully started its 5-year observing program.
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Desi starts its large spectroscopic survey for 5 years
Building a giant 2D map of the Universe to prepare for DESI's 3D exploration
Jan 13, 2021
Building a giant 2D map of the Universe to prepare for DESI's 3D exploration
Nearly 200 researchers were involved in collecting, processing and assembling images of half the sky to prepare for the start of observations by DESI, the Dark Energy Spectroscopic Instrument, which aims to solve the mystery of dark energy.
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Jul 20, 2020
The dark energy properties revealed over 11 billion years of the Universe expansion
The Sloan Digital Sky Survey (SDSS) published in July a complete analysis of the largest three-dimensional map of the Universe ever created, reconstructing the history of its expansion over a period of 11 billion years.
The dark energy properties revealed over 11 billion years of the Universe expansion
The net is tightening on the neutrinos of the cosmos...
Dec 20, 2019
The net is tightening on the neutrinos of the cosmos...
A team from IRFU's Department of Particle Physics (DPhP) has just conducted the most accurate study to date of the mass of cosmic neutrinos, including both standard model neutrinos and sterile neutrinos contributing to dark matter.
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Apr 11, 2019
DESI moves to Kitt Peak
The Dark Energy Spectroscopic Instrument (DESI) is intended to make the spectroscopic survey of 35 million galaxies and quasars from 2020 onwards, to study precisely the properties of dark energy.
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DESI moves to Kitt Peak
When neutrinos encounter
Feb 25, 2019
When neutrinos encounter "baryonic acoustic oscillations"...
Neutrinos from the Big Bang have been traveling the Universe for more than 13 billion years. They are almost undetectable but their footprint on the formation of large structures in the Universe, such as galaxies, can be detected.
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Feb 27, 2018
The brightest objects in the Universe in the onslaught of general relativity
More than twenty years after the discovery of the acceleration of the expansion of the Universe, the nature of the physical phenomenon at the origin of this acceleration, called "dark energy", is still unknown.
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The brightest objects in the Universe in the onslaught of general relativity
Probing Dark Matter in the Light of Quasars
Jul 10, 2017
Probing Dark Matter in the Light of Quasars
Several decades after its discovery, dark matter remains enigmatic. Researchers from IRFU have tested three models of dark matter in which the formation of large structures was modeled using supercomputing.
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Jun 13, 2017
A New Cosmic Mapping Reinforces Modern Cosmology
An international team from the Sloan Digital Sky Survey (SDSS) has carried out the first large-scale spectroscopic analysis of quasars, and was able to create a full 3D map of the universe and its large structures as it was 6 billion years ago.
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A New Cosmic Mapping Reinforces Modern Cosmology
DESI, the kick-off is given!
Jan 30, 2017
DESI, the kick-off is given!
The Dark Energy Spectroscopic Instrument (Desi) will analyze the light emitted by 35 million galaxies and quasars at various times in the past of the Universe and up to 11 billion years to better understand dark energy.
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Jan 29, 2017
Is the Universe Homogeneous on a Large Scale?
The homogeneity of our universe is among the founding principles of cosmology—yet are we really sure that it is so? Until now, the main argument supporting the idea that it is homogeneous was based on a coherence test that implicitly used the homogeneity of the universe for its demonstration.
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Is the Universe Homogeneous on a Large Scale?
Astronomers at the Sloan Digital Sky Survey make the most accurate measurement to date of the rate of expansion of the universe
Apr 08, 2014
Astronomers at the Sloan Digital Sky Survey make the most accurate measurement to date of the rate of expansion of the universe
  Astronomers at the Sloan Digital Sky Survey (SDSS) used 140,000 distant quasars to measure the rate of expansion of the Universe when it was only a quarter of its present age. This is the best measure of the rate of expansion at any time in the 13 billion years since the Big Bang.
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Dernière mise à jour : Nov 19th, 2024

 

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