Séminaire IPAG

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Black holes, neutron stars and white dwarfs with gravitational waves : deafening mergers and soft whispers

jeudi 2 décembre 2021 - 11h00

Astrid Lamberts - OCA
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Since the first detection in 2015, 90 compact object mergers have been discovered by the LIGO and Virgo gravitational wave (GW) detectors. GW astronomy has now become a mature field of research and determining dominant formation channels seems within reach. To do so, one has to design accurate models of stellar progenitors, accounting for star formation in diverse environments (field binaries, low metallicity, star clusters...) combined with complex binary and cluster evolution models. In this talk I will briefly present the population of compact objects detected by the LIGO/Virgo/KAGRA collaboration, with a special mention of the mixed neutron-star/black hole binaries. Then I will present models for the interpretation of GW populations based on cosmological simulations and explain what we can already learn about the conditions where the progenitors were formed. I will focus on binary black holes observable by current ground-based detectors and then move on to the binary compact objects in the Milky Way as we will observe them with space-based gravitational wave detector LISA.

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Hôtes : Benoît Cerutti

Salle Manuel Forestini, 414 rue de la piscine, 38400 Saint Martin d'Hères