We report spectral variability with a di erence of 0:56 = 0:18stat 0:10sys at 95% confidence intervals, between sub-periods of the 2021 dataset. We also detail our investigation into X …

Across both periastron passages, most of the FUV spectrum dropped in flux then recovered a few months later. The 2020 periastron passage included enhancements of FUV flux in narrow …

PSR B1259-63/LS 2883 is a well-studied gamma-ray binary hosting a pulsar in a 3.4-year eccentric orbit around a Be-type star. Its non-thermal emission spans from radio to TeV …

We determine the ad-vance of the periastron of a planet orbiting a star by calculating the aberration of gravitons in an equivalent accelerating system using the principle of equivalence.

In globular clusters, dynamical interactions give rise to a population of eccentric double white dwarfs detectable by the Laser Interferometer Space Antenna (LISA) up to the Large …

We find a new solution to calculate the orbital periastron advance of a test body subject to a central gravita-tional force field for relativistic theories and models beyond Einstein.

Observations of the last four periastron passages, taken in 2010–2021, demonstrate periastron-to-periastron variability at all wavelengths, probably linked to the state of the Be star’s …