Papers
Topics
Authors
Recent
Gemini 2.5 Flash
Gemini 2.5 Flash
134 tokens/sec
GPT-4o
9 tokens/sec
Gemini 2.5 Pro Pro
47 tokens/sec
o3 Pro
4 tokens/sec
GPT-4.1 Pro
38 tokens/sec
DeepSeek R1 via Azure Pro
28 tokens/sec
2000 character limit reached

Model-independent determination of $H_0$ and $Ω_{K0}$ from strong lensing and type Ia supernovae (1905.09781v2)

Published 23 May 2019 in astro-ph.CO and gr-qc

Abstract: We present the first determination of the Hubble constant $H_0$ from strong lensing time delay data and type Ia supernova luminosity distances that is independent of the cosmological model. We also determine the spatial curvature model-independently. We assume that light propagation over long distances is described by the FLRW metric and geometrical optics holds, but make no assumption about the contents of the Universe or the theory of gravity on cosmological scales. We find $H_0=75.7{+4.5}_{-4.4}$ km/s/Mpc and $\Omega_{K0}=0.12{+0.27}_{-0.25}$. This is a 6\% determination of $H_0$. A weak prior from the cosmic microwave background on the distance to the last scattering surface improves this to $H_0=76.8{+4.2}_{-3.8}$ km/s/Mpc and $\Omega_{K0}=0.18{+0.25}_{-0.18}$. Assuming zero spatial curvature, we get $H_0=74.2{+3.0}_{-2.9}$ km/s/Mpc, a precision of $4\%$. The measurements also provide a consistency test of the FLRW metric: we find no evidence against it.

Citations (29)

Summary

We haven't generated a summary for this paper yet.