[Todos] HOY 14hs - Juan Calderon Bustillo - Looking for signatures of boson-star mergers in gravitational-wave signals

[Coloquios DF-Exactas UBA]

*Jueves 01 de septiembre a las 14hs*
Coloquio del Departamento de Física - Exactas - UBA
*Aula Federman *- Primer Piso - Pabellón 1 - Ciudad Universitaria - CABA
*(Recuerden traer su propia taza para el café)*

*Looking for signatures of boson-star mergers in gravitational-wave
signals: towards using LIGO-Virgo as particle detectors*
*Juan Calderon Bustillo - Universidad de Santiago de Compostela, España*
Gravitational waves provide us with an unique opportunity to observe ultra
compact objects, such as black-holes, in a highly dynamical state, as pairs
of these form and merge. This allows us to study the dynamics of space-time
in the strong gravity regime and, in particular, search for subtle
signatures of, nowadays theoretical, exotic objects known as black-hole
mimickers. Among these, so-called boson stars are especially appealing due
their simplicity and the fact that the particles building them up, known as
ultralight bosons, are widely considered strong candidates to form (part
of) what we know as Dark Matter. In this seminar I will describe ongoing
efforts to produce catalogs of numerically simulated gravitational-wave
signals from boson-star mergers that can be compared to existing LIGO-Virgo
data in order to look for such objects, together with the corresponding
data analysis techniques. In particular, I will focus on the qualitative
discussion of the phenomenology of boson-star mergers, on the analysis of
several LIGO-Virgo signals under this exotic hypothesis vs. the canonical
black-hole merger one and on the estimation of the putative boson-star
parameters, particularly focusing on the mass of the underlying bosonic
particle.
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