Dark matter
Visible matter (left) and dark matter (right) in the field of the COSMOS survey.
For several decades now, numerous astrophysical and cosmological observations have been interpreted by assuming the existence of large quantities of 'dark matter' that cannot be directly observed (galactic rotation curves, cluster masses, gravitational shear, distribution of large structures and fossil radiation, etc.). Understanding the nature of this dark matter is one of the major challenges of modern cosmology. Several DAPNIA experiments aim to detect dark matter and determine its properties.
maj : 18-10-2005 (601)
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11 décembre 2009
Edelweiss-ID: innovative detectors for tracking dark matter in the Milky Way
The new generation of detectors from the Edelweiss experiment, which is searching for dark matter, have just delivered their first results. Remarkably reliable and robust, they have proved excellent at removing interference signals. Although only just installed and not yet ... Lire la suite » |
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07 mars 2009
The Nobel Prize for Physics 2008 rewarded Makoto Kobayashi and Toshihide Maskawa for having realised that the weak interaction does not affect particles and antiparticles in the same way1. In this theory, it was expected that the strong interaction would exhibit the same type of asymmetry between ... Lire la suite » |
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29 janvier 2011
Clusters and superclusters billions of light-years away
An international team, including scientists from the Astrophysics Department-AIM and the Particle Physics Department of CEA-Irfu, has just used the Planck satellite to discover galaxy clusters with characteristics that were previously unknown. These clusters, which contain up to a thousand ... Lire la suite » |
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14 janvier 2011
The scientific community had to wait 18 months for the data collected by Planck, the European Space Agency satellite. Now, the first scientific results are in. The first edition of the compact sources catalog (ERCSC, Early Release Compact Sources Catalogue), with several thousand sources detected ... Lire la suite » |
Expériences
