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| Open AccessSearching for ultra-light bosons and constraining black hole spin distributions with stellar tidal disruption events
Stellar tidal disruption events (TDEs) occur when stars pass close enough to supermassive black holes. Here, the authors show that future searches TDEs have potential to uncover the existence of ultralight bosons.
- Peizhi Du
- , Daniel Egaña-Ugrinovic
- & Rosalba Perna
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| Open AccessMeasuring the Hubble constant with a sample of kilonovae
Kilonovae observations can be used to out constraints on the Hubble constant (H0). Here, the authors show H0 measurements by combining light curves of four short gamma-ray burts with GW170817 are about a factor of 2-3 more precise than the standard-siren measurements using only gravitational-waves.
- Michael W. Coughlin
- , Sarah Antier
- & Nandita Khetan
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| Open AccessGravitational-wave asteroseismology with fundamental modes from compact binary inspirals
Independently measuring the tidal deformability and the fundamental oscillation mode (fmode) frequency enables tests of gravity and the nature of compact binaries. Here, the authors constrain the f-mode frequencies of the companions of GW170817 from direct measurements, demonstrating gravitational wave asteroseismology with binary inspiral signals alone.
- Geraint Pratten
- , Patricia Schmidt
- & Tanja Hinderer
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Article
| Open AccessSurfaces away from horizons are not thermodynamic
It has been conjectured that gravity may emerge from an entropic force arising on a holographic screen due to its purportedly intrinsic thermodynamic properties. Here, the authors test this conjecture by demonstrating that this key assumption of entropic force is inconsistent with general relativity.
- Zhi-Wei Wang
- & Samuel L. Braunstein