3 papers
gr-qc2026
Testing Dark Energy with Black Hole Ringdown
Laurens Smulders, Johannes Noller, Sergi Sirera
We show that dynamical dark energy theories can imprint modifications on the quasi-normal mode (QNM) spectrum characterising black hole ringdown. The time dependence of dyna…
gr-qc2025
Black hole ringdown tests of gravity
Sergi Sirera
Understanding gravity is at the heart of some of the biggest questions in modern physics. While General Relativity (GR) is a theoretically unique and experimentally well-tested fra…
gr-qc2025
Inverting no-hair theorems: How requiring General Relativity solutions restricts scalar-tensor theories
Hajime Kobayashi, Shinji Mukohyama, Johannes Noller +3
Black hole solutions in general scalar-tensor theories are known to permit hair, i.e. non-trivial scalar profiles and/or metric solutions different from the ones of General Relativ…