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<p>Hola todos:</p>
<p>Lamentablemente por razones de fuerza mayor tuvimos que
reprogramar el seminario para la semana que viene. Enviaremos el
nuevo día y hora a la brevedad. Les pido disculpas por los
múltiples emails.</p>
<p>Nicolás Grandi.<br>
</p>
<p><br>
</p>
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<blockquote type="cite"
cite="mid:e0f95de5-978f-5d45-01f5-c2257b9076f1@fisica.unlp.edu.ar">
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<div>Hola a todos:</div>
<div><b><br>
</b></div>
<div>Este es un recordatorio de que este 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>
</div>
<div><b><br>
</b></div>
<div><b>Title: </b><i>Black holes or boson stars? The challenge
of interpreting gravitational-wave signals from high-mass
compact mergers.</i></div>
<div><br>
</div>
<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>
<div><br>
</div>
<div>Esperando verlos en el seminario,</div>
<div><br>
</div>
<div>Nicolás Grandi.<br>
</div>
</div>
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