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Maximum amplitude of the high-redshift 21-cm absorption feature
Pablo Villanueva-Domingo, Olga Mena, Jordi Miralda-Escudé
We examine the maximum possible strength of the global 21-cm absorption dip on the Cosmic Background Radiation at high-redshift caused by the atomic intergalactic medium, when the…
Do we have any hope of detecting scattering between dark energy and baryons through cosmology?
Sunny Vagnozzi, Luca Visinelli, Olga Mena +1
We consider the possibility that dark energy and baryons might scatter off each other. The type of interaction we consider leads to a pure momentum exchange, and does not affect th…
Non-minimal dark sector physics and cosmological tensions
Eleonora Di Valentino, Alessandro Melchiorri, Olga Mena +1
We explore whether non-standard dark sector physics might be required to solve the existing cosmological tensions. The properties we consider in combination are an interaction betw…
Interacting dark energy in the early 2020s: a promising solution to the and cosmic shear tensions
Eleonora Di Valentino, Alessandro Melchiorri, Olga Mena +1
We examine interactions between dark matter and dark energy in light of the latest cosmological observations, focusing on a specific model with coupling proportional to the dark en…
Dark sectors with dynamical coupling
Weiqiang Yang, Olga Mena, Supriya Pan +1
Coupled dark matter-dark energy scenarios are modeled via a dimensionless parameter , which controls the strength of their interaction. While this coupling is commonly assumed t…
Constraining the primordial black hole abundance with 21cm cosmology
Olga Mena, Sergio Palomares-Ruiz, Pablo Villanueva-Domingo +1
The discoveries of a number of binary black hole mergers by LIGO and VIRGO has reinvigorated the interest that primordial black holes (PBHs) of tens of solar masses could contribut…