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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…
Revisiting a negative cosmological constant from low-redshift data
Luca Visinelli, Sunny Vagnozzi, Ulf Danielsson
Persisting tensions between high-redshift and low-redshift cosmological observations suggest the dark energy sector of the Universe might be more complex than the positive cosmolog…
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…
Cosmological searches for the neutrino mass scale and mass ordering
Sunny Vagnozzi
In this thesis, I describe a number of recent important developments in neutrino cosmology on three fronts. Firstly, focusing on Large-Scale Structure (LSS) data, I will show that…
The Simons Observatory: Astro2020 Decadal Project Whitepaper
The Simons Observatory Collaboration, Maximilian H. Abitbol, Shunsuke Adachi +280
The Simons Observatory (SO) is a ground-based cosmic microwave background (CMB) experiment sited on Cerro Toco in the Atacama Desert in Chile that promises to provide breakthrough…
New physics in light of the tension: an alternative view
Sunny Vagnozzi
The strong discrepancy between local and inverse distance ladder estimates of the Hubble constant could be pointing towards new physics beyond CDM. Several attempts to add…
Dawn of the dark: unified dark sectors and the EDGES Cosmic Dawn 21-cm signal
Weiqiang Yang, Supriya Pan, Sunny Vagnozzi +3
While the origin and composition of dark matter and dark energy remains unknown, it is possible that they might represent two manifestations of a single entity, as occurring in uni…
Hunting for extra dimensions in the shadow of M87*
Sunny Vagnozzi, Luca Visinelli
The Event Horizon Telescope has recently provided the first image of the dark shadow around the supermassive black hole M87*. The observation of a highly circular shadow provides s…
Listening to the sound of dark sector interactions with gravitational wave standard sirens
Weiqiang Yang, Sunny Vagnozzi, Eleonora Di Valentino +3
We consider two stable Interacting Dark Matter -- Dark Energy models and confront them against current Cosmic Microwave Background data from the \textit{Planck} satellite. We then…
Testing the rotational nature of the supermassive object M87* from the circularity and size of its first image
Cosimo Bambi, Katherine Freese, Sunny Vagnozzi +1
The Event Horizon Telescope (EHT) collaboration has recently released the first image of a black hole (BH), opening a new window onto tests of general relativity in the strong fiel…