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physics.ed-ph2025
In Praise of Slowness
Roland Lehoucq, Etienne Ligout
While speed is an ubiquitous concept in physics, its inverse - known as slowness - sometimes proves more relevant. We discuss some case studies within classical physics where such…
gr-qc2025
Innermost stable circular orbit of arbitrary-mass compact binaries at fourth post-Newtonian order
Luc Blanchet, David Langlois, Etienne Ligout
We compute by means of post-Newtonian (PN) methods the innermost stable circular orbit (ISCO) of arbitrary-mass (in particular, comparable-mass) compact binaries. Two methods are u…