Author

K. Leyde

3 papers indexed here

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Review Oct 2026

Cosmological Inference with Gravitational-Wave Dark Sirens and 21-cm Intensity Mapping: Forecasts for LIGO-Virgo-KAGRA with MeerKAT and SKAO

Gravitational waves (GWs) and 21-cm intensity mapping (IM) are emerging as complementary cosmological probes: GWs provide direct luminosity-distance measurements, while neutral-hydrogen (HI) IM traces the matter distribution in redshift space. Their synergy offers a promising avenue for precise measurements of the Hubb...

D. Nanadoumgar-Lacroze, K. Leyde, S. Cunnington et al. · 1 citation

Preprint Aug 2026

CosmoPyro: Gradients for Gravitational-Wave Cosmology

Gravitational-wave (GW) observations of stellar-mass compact binary coalescences directly measure the source luminosity distance. Combined with the source redshift, these measurements constrain the current expansion rate of the Universe, the Hubble constant, $H_0$, or $h=H_0 / [100 \,{\rm km \,s^{-1} \, Mpc^{-1}}]$. Fo...

K. Leyde, E. Colangeli · 0 citations

Preprint Aug 2026

No parametrisation, No Problem: A Weakly Modelled Framework to Constrain the Luminosity Distance--Redshift Relation Using Gravitational Wave Sirens

Cosmological tests of general relativity (GR) using gravitational waves (GWs) often rely on parametrised forms of the luminosity distance-redshift ($ d_{\rm L} - z$) relation, which is modified in alternative theories of gravity where the gravitational coupling strength is time-dependent. Although they can lead to stri...

E. Colangeli, K. Leyde, T. Baker et al. · 1 citation