[AAA] SEMINARIO IATE (17/11 -11 hs). Abundance of Primordial Black Holes from quasar microlensing effect in lens galaxies

[Seminarios IATE - Conicet]

Buenos días,

Invitamos al Ciclo de Seminarios del IATE de esta semana con la siguiente
presentación:

*Título: **Abundance of Primordial Black Holes from quasar microlensing
effect in lens galaxies*

*Expositora: *Ana Esteban Gutiérrez (Instituto de Física y Astronomía,
Universidad de Valparaíso, Chile)

*Fecha: *viernes 17 de noviembre, 11 hs

*Resumen: *The quasar microlensing effect allows us to estimate the mass
and abundance of any kind of compact object in the lens galaxies, being
sensitive to both, baryonic and dark matter (DM) distributions. Recent
results of black hole (BH) mergers coming from the Gravitational Wave (GW)
experiments LIGO/Virgo raised again the interest in studying other
astrophysical candidates to be part of the elusive DM nature (specifically,
the intermediate-mass BHs). In this talk, I present the results of using
optical and X-ray quasar microlensing observations and applying
magnification statistics with a Bayesian analysis to simulations of a mixed
population of Primordial Black Holes (PBHs) and stars, to constraint their
abundances. These PBHs are extensively considered to explain the observed
amount of DM in the universe and were postulated as a possible explanation
for the GW mergers. Finally, the mass range explored in this work, ranging
from planetary to intermediate-mass PBHs,  provides new upper limits for
the estimated fraction of the DM in form of PBHs and sets the strongest
bounds in this mass range according to other microlensing studies.

Esperamos vuestra participación este viernes en el auditorio del IATE.
Se podrá participar virtualmente mediante el enlace:
https://meet.google.com/hgu-akrs-xvc
------------ próxima parte ------------
Se ha borrado un adjunto en formato HTML...
URL: <http://fcaglp.fcaglp.unlp.edu.ar/pipermail/aaa/attachments/20231114/333623ed/attachment.html>