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Data span and frequency coverage requirements for robust detection and inference in PTAs: A case study with EPTA DR2
Irene Ferranti, Mikel Falxa, Federico Fantoccoli +2
Pulsar Timing Arrays (PTAs) are approaching the sensitivity required for a detection of the nanohertz stochastic gravitational-wave background (GWB). This makes it crucial to…
Modeling Non-Gaussianities in Pulsar Timing Array data analysis using Gaussian Mixture Models
Mikel Falxa, Alberto Sesana
In Pulsar Timing Array (PTA) data analysis, noise is typically assumed to be Gaussian, and the marginalized likelihood has a well-established analytical form derived within the fra…
Searching for Gravitational Waves with Gaia and its Cross-Correlation with PTA: Absolute vs Relative Astrometry
Massimo Vaglio, Mikel Falxa, Giorgio Mentasti +5
Astrometric missions like Gaia provide exceptionally precise measurements of stellar positions and proper motions. Gravitational waves traveling between the observer and distant st…
Dissecting the nanohertz gravitational wave sky: Frequency-correlated anisotropy induced by eccentric supermassive black hole binaries
Beatrice Eleonora Moreschi, Serena Valtolina, Alberto Sesana +5
Revealing the nature of the nanohertz gravitational wave (GW) signal recently reported by pulsar timing array (PTA) collaborations around the world is the next goal of low-frequenc…