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Author

Alice Townsend

2 papers indexed here

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Preprint Sep 2026

Stress-testing the spatially flat Universe: nonparametric spatial curvature determination from DESI DR2

We present a nonparametric determination of spatial curvature using only late-time geometrical probes. Under a Gaussian Process smoothness prior, we jointly constrain the dimensionless expansion history and $\Omega_K$, combining three Type Ia Supernovae (SNeIa) samples with either DESI DR2 line-of-sight baryon acoustic...

Hannah C. Turner, S. Dhawan, S. Vagnozzi et al. · 0 citations
Preprint Aug 2026

Follow-up of SN 2025wny IV: Photometric Time-delay Measurements of a Strongly Lensed Superluminous Supernova

We present photometric time-delay measurements of SN 2025wny, the first strongly lensed Type I superluminous supernova (SLSN-I), discovered at $z = 2.015$. Time-delay measurements from strongly lensed supernovae provide an independent probe of cosmology and the Hubble constant, $H_0$, without reliance on the local dist...

Alice Townsend, S. Dhawan, E. Hayes et al. · 0 citations

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