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Variability in high‑mass X‑ray binaries

Wilms, J.; Pottschmidt, K.; Grinberg, V. +5 more

Strongly magnetized, accreting neutron stars show periodic and aperiodic variability over a wide range of time scales. By obtaining spectral and timing information on these different time scales, we can have a closer look into the physics of accretion close to the neutron star and the properties of the accreted material. One of the most prominent …

η Carinae: Particle acceleration and multimessenger aspects

Walter, R.; Balbo, M.

η Carinae is composed of two very massive stars orbiting each other in 5.5 years. The primary star features the densest known stellar wind, colliding with that expelled by its companion. The wind collision region dissipates energy and accelerates particles up to relativistic energies, producing nonthermal X‑ray and γ‑ray emission detected by Beppo…