BEGIN:VCALENDAR VERSION:2.0 PRODID:-//linuxsoftware.nz//NONSGML Joyous v1.4//EN BEGIN:VEVENT SUMMARY:Testing the nature of dark compact objects and dark matter with gr avitational waves DTSTART:20220407T143000Z DTEND:20220407T160000Z DTSTAMP:20260812T072810Z UID:3df9658a-4e0d-4e4e-b0e9-6f7d78aaef79 SEQUENCE:1 CREATED:20220405T092905Z DESCRIPTION:Abstract:The direct observation of gravitational waves already allowed us to directly observe hundreds of dark ultracompact objects (mos t likely black holes) that were entirely invisible to us until very recent ly. As remarkable as this feat already is\, these observations only mark t he beginning of what lays ahead. Planned future gravitational-wave detecto rs promise to make gravitational-wave physics a precision\, data-driven sc ience field\, which will make it possible to address (and possibly open ne w) outstanding problems in various areas of physics and astronomy but also potentially opening the door to unexpected discoveries.With this motivati on in mind\, in this talk I propose to summarise some of my past and curre nt work that aims at tackling questions such as: how well do the black hol e solutions predicted by General Relativity explain the dark compact objec ts we observe with gravitational waves? Are there other more exotic compac t objects in the Universe? Is dark matter composed of particles\, such as axions or dark photons? In particular\, I will (i) discuss how the multipo lar structure of compact objects can be inferred through gravitational wav e observations\, focusing on recent work where we computed the corrections to the dynamics of a binary system due to generic\, nonaxisymmetric mass quadrupole moments to leading post-Newtonian order and (ii) (time permitti ng) shortly discuss current and future prospects for gravitational-wave ob servations to directly constrain the existence of ultralight boson fields\ , which have been proposed as strong dark matter candidates. LAST-MODIFIED:20220405T092905Z LOCATION:Sala de Seminários do DF\, Pavilhão de Física\, 2º piso URL:http://df.vps.tecnico.ulisboa.pt/pt/eventos/testing-the-nature-of-dark -compact-objects-and-dark-matter-with-gravitational-waves/ X-ALT-DESC;FMTTYPE=text/html:

Abstract:
The direct observation of gravitational waves already allowed us to dire ctly observe hundreds of dark ultracompact objects (most likely black hole s) that were entirely invisible to us until very recently. As remarkable a s this feat already is\, these observations only mark the beginning of wha t lays ahead. Planned future gravitational-wave detectors promise to make gravitational-wave physics a precision\, data-driven science field\, which will make it possible to address (and possibly open new) outstanding prob lems in various areas of physics and astronomy but also potentially openin g the door to unexpected discoveries.
With this motivation in mind\, i n this talk I propose to summarise some of my past and current work that a ims at tackling questions such as: how well do the black hole solutions pr edicted by General Relativity explain the dark compact objects we observe with gravitational waves? Are there other more exotic compact objects in t he Universe? Is dark matter composed of particles\, such as axions or dark photons? In particular\, I will (i) discuss how the multipolar structure of compact objects can be inferred through gravitational wave observations \, focusing on recent work where we computed the corrections to the dynami cs of a binary system due to generic\, nonaxisymmetric mass quadrupole mom ents to leading post-Newtonian order and (ii) (time permitting) shortly di scuss current and future prospects for gravitational-wave observations to directly constrain the existence of ultralight boson fields\, which have b een proposed as strong dark matter candidates.

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