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24–30 nov. 2019
Centre Moulin Mer
Fuseau horaire Europe/Paris

StarTrack predictions of the stochastic gravitationnal-wave background from compact binary coalescences

26 nov. 2019, 15:30
30m
Centre Moulin Mer

Centre Moulin Mer

Route du centre nautique, 29460 Logonna-Daoulas www.moulin-mer.fr/ https://goo.gl/maps/zfearb173UxabXPFA (English) The centre is located at about 30 minutes drive from Brest. We will provide transport from Brest airport and train station to the centre Moulin Mer. The shuttle will leave the airport at 18h30 and the station at 19h on the 24th November and arrive at the airport at 8h and the station at 8h30 on the 30th November. (Français) Le centre est situé pas loin de la ville de Brest. Il y aura une navette entre l'aéroport/la gare et le centre Moulin Mer. La navette partira de l'aéroport à 18h30 et de la gare à 19h le 24 novembre et arrivera à l'aéroport à 8h et à la gare vers 8h30 le 30 novembre.

Orateur

Carole Perigois

Description

In this study we evaluate the contribution of binary coalescences to the stochastic gravitationnal-wave background from population 1, 2 and 3, as defined by to the hertzsprung Russel classification. We assume that the coalescences we observed are formed throug stellar evolution in the field of galaxies with no dynamical interactions. We use the new population synthesis starTrack to generate realistic population of merging binaries (binary black holes BBH, but also binary neutron stars and neutron star-blackholes), and calculate the energy density spectrum of the background. We account for the eccentricity, which is expected to play a signifiant role at low frequencies accessible by the space antenna LISA. In addition, for the first time, we include binaries that do not merge in a Hubble time. We obtain the energy density contributions for all of these populations and also the residual contributions, after detected sources are subtracted by four detector networks: HLV (LIGO Hanford and Livingstone and Virgo), HLVIK (HLV and LIGO India and Kagra), ET (Einstein Telescope), and ET+2CE (ET and two cosmic explorer located at the actual place of Hanford and Livingston).

Documents de présentation

Aucun document.