2 papers
astro-ph.CO2026
How isotropic is dark energy?
Richard A. Battye, Adam Moss
Tensions in late-time expansion data have renewed interest in models beyond CDM. We ask: \emph{how isotropic must dark energy be?} Working in Bianchi~I, we allow time-dependent…
astro-ph.IM2025
White Dwarfs in Wide Binary Systems as Reliable Age Calibrators
Alberto Rebassa-Mansergas, Roberto Raddi, Anna F. Pala +13
Deriving precise stellar ages is a challenging task. Consequently, age-dependent relations - such as the age-metallicity and age-velocity dispersion relations of the Milky Way, or…