3 papers
astro-ph.IM2026
Fisher and DALI posterior approximations for testing gravity with gravitational waves
Felipe A. da Silva Barbosa, Davi C. Rodrigues, Josiel Mendonça Soares de Souza +1
We investigate the accuracy and computational efficiency of posterior approximations for gravitational-wave (GW) parameter estimation based on Fisher Matrix and its higher-order ex…
astro-ph.CO2025
On the validity of the continuity equation in a modified gravity framework with CMB, DES 3x2pt and tomographic ISW data
Ziad Sakr, Miguel Quartin
In this work we propose a phenomenological modification to the continuity equation at the linear perturbation level and test it using combinations of the CMB temperature, polarizat…
astro-ph.IM2025
On the use of the Derivative Approximation for Likelihoods for Gravitational Wave Inference
Josiel Mendonça Soares de Souza, Miguel Quartin
Posterior inference on the more than a dozen parameters governing a gravitational wave (GW) event is challenging. A typical MCMC analysis can take around CPU hours, and next…