Orateur
Dr
Thierry Pradier
(IPHC/DRS & Université Louis Pasteur)
Description
Both gravitational waves (GW) sources and high energy (HE) neutrino emitters involve compact objects and matter moving at relativistic speeds. Moreover, GW emission requires departure from spherical symmetry, which is the case if clumps of matter are accreted around black holes, and blobs of plasma are ejected in astrophysical jets, where HE neutrinos are believed to be produced.
Both messengers do not interact with surrounding matter, hence pointing directly to the heart of the engines that power those emissions. Time coincidences between GW interferometers and HE neutrino telescopes would then give a unique insight on the physics of the most powerful objects in the Universe. Those coincidences in time require GW bursts (signals localized in time), and would give the possibility for GW antennae to confirm a burst detection, and for neutrino telescopes to sign the non-atmospheric origin of an upward-going muon. Some informations related to Quantum Gravity models could also be extracted.
This talk will try to demonstrate that such coincidences are:
- possible : sources of both GW and HE neutrinos, able to emit signals coincident in time, exist in our Galaxy;
- observable : the visibility sky maps of e.g. Virgo and Antares are not orthogonal;
- detectable : the resulting coincidence probability for a fixed accidental coincidence rate in a given time window (e.g. 1/yr and dt = 1s), constraining the authorized background level for each individual detector, is not negligible.
Auteur principal
Dr
Thierry Pradier
(IPHC/DRS & Université Louis Pasteur)
