Le physicien Stephen Fairhurst, en parlant de la façon dont il recherche les signaux provenant de la fusion des trous noirs et des étoiles neutrons, sur la scène Cosmos, au New Scientist Live 2018
4071 x 3334 px | 34,5 x 28,2 cm | 13,6 x 11,1 inches | 300dpi
Date de la prise de vue:
20 septembre 2018
Lieu:
ExCel London
Informations supplémentaires:
Cette image peut avoir des imperfections car il s’agit d’une image historique ou de reportage.
Gravitational waves are ripples in the fabric of space and time caused by cosmic events such as the collision of black holes or neutron stars. Two years ago, astronomers announced that they had discovered gravitational waves from merging black holes for the first time and since then they have observed several such mergers. Last year, the same team identified gravitational waves from a new source: a pair of colliding neutron stars. Telescopes around the world swung into action and observed a burst of gamma rays and then visible light, X-rays and radio waves – giving astrophysicists extra, valuable details about the collision. In this talk, Stephen Fairhurst discusses the detectors used to observe gravitational waves, details of the first observations and what they are teaching us about the universe. Stephen Fairhurst is a professor of physics and astronomy at Cardiff University. His research focuses on identifying gravitational wave signals using the LIGO, Virgo and GEO detectors. In particular, he specialises in looking for gravitational wave signals emitted by merging black holes and neutron stars, and working out how we might use the observed signals to understand the properties of these objects. GEO600 is a ground-based interferometric gravitational wave detector located near Hannover, Germany. It is designed and operated by scientists from the Max Planck Institute for Gravitational Physics and the Leibniz Universität Hannover, along with partners in the United Kingdom, and is funded by the Max Planck Society and the Science and Technology Facilities Council (STFC). GEO600 is part of a worldwide network of gravitational wave detectors. Two detectors have been constructed in the USA (LIGO), and one each in Italy (Virgo) and Japan (KAGRA). Scientists from GEO600 and LIGO collaborate within the LIGO Scientific Collaboration (LSC). GEO600 scientists together with the Laser Zentrum Hannover (LZH) built the lasers for Advanced LIGO.
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