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gr-qc2022
A class of cosmological models with spatially constant sign-changing curvature
Miguel Sánchez
We construct globally hyperbolic spacetimes such that each slice of the universal time is a model space of constant curvature which may not only vary with…
astro-ph.IM2022★ 2 cited
The Athena X-ray Integral Field Unit: a consolidated design for the system requirement review of the preliminary definition phase
Didier Barret, Vincent Albouys, Jan-Willem den Herder +296
The Athena X-ray Integral Unit (X-IFU) is the high resolution X-ray spectrometer, studied since 2015 for flying in the mid-30s on the Athena space X-ray Observatory, a versatile ob…