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Superradiance evolution of black hole shadows revisited
Rittick Roy, Sunny Vagnozzi, Luca Visinelli
Black hole (BH) shadows can be used to probe new physics in the form of ultra-light particles via the phenomenon of superradiant instability. By directly affecting the BH mass and…
Primordial gravitational waves from NANOGrav: a broken power-law approach
Micol Benetti, Leila Lobato Graef, Sunny Vagnozzi
We revisit the possibility that the stochastic common-spectrum process recently detected by the NANOGrav pulsar timing array experiment could be due to primordial gravitational wav…
Novel constraints on fifth forces and ultralight dark sector with asteroidal data
Yu-Dai Tsai, Youjia Wu, Sunny Vagnozzi +1
We study for the first time the possibility of probing long-range fifth forces utilizing asteroid astrometric data, via the fifth force-induced orbital precession. We examine nine…
Arbitrating the discrepancy with growth rate measurements from Redshift-Space Distortions
Rafael C. Nunes, Sunny Vagnozzi
Within the CDM model, measurements from recent Cosmic Microwave Background (CMB) and weak lensing (WL) surveys have uncovered a disagreement in the inferred value of t…
Consistency tests of CDM from the early integrated Sachs-Wolfe effect: Implications for early-time new physics and the Hubble tension
Sunny Vagnozzi
New physics increasing the expansion rate just prior to recombination is among the least unlikely solutions to the Hubble tension, and would be expected to leave an important signa…
Implications for the Hubble tension from the ages of the oldest astrophysical objects
Sunny Vagnozzi, Fabio Pacucci, Abraham Loeb
We use the ages of old astrophysical objects (OAO) in the redshift range as stringent tests of the late-time cosmic expansion history. Since the age of th…
Non-parametric spatial curvature inference using late-universe cosmological probes
Suhail Dhawan, Justin Alsing, Sunny Vagnozzi
Inferring high-fidelity constraints on the spatial curvature parameter, , under as few assumptions as possible, is of fundamental importance in cosmology. We propose a m…
Direct detection of dark energy: the XENON1T excess and future prospects
Sunny Vagnozzi, Luca Visinelli, Philippe Brax +2
We explore the prospects for direct detection of dark energy by current and upcoming terrestrial dark matter direct detection experiments. If dark energy is driven by a new light d…