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<div>Hola a todos:</div>
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<div>El próximo miércoles 24/8 recibiremos la visita del Prof. Juan
Calderón Bustillo, de la Universidad de Santiago de Compostela,
quien es miembro del proyecto LIGO, cuyos fundadores recibieron el
premio Nobel de física 2017 por su descubrimiento de las ondas
gravitacionales. Dictará el siguiente seminario en el IFLP a las
15:30, al que están todos cordialmente invitados<br>
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<div><b>Title: </b><i>Black holes or boson stars? The challenge of
interpreting gravitational-wave signals from high-mass compact
mergers.</i></div>
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<div><b>Abstract:</b> <i>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.</i></div>
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<div>Esperando verlos en el seminario,</div>
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<div>Nicolás Grandi.<br>
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