Model-Independent Determination of H-0 and Omega(K0) from Strong Lensing and Type Ia Supernovae

Show full item record



Permalink

http://hdl.handle.net/10138/309999

Citation

Collett , T , Montanari , F & Räsänen , S 2019 , ' Model-Independent Determination of H-0 and Omega(K0) from Strong Lensing and Type Ia Supernovae ' , Physical Review Letters , vol. 123 , no. 23 , 231101 . https://doi.org/10.1103/PhysRevLett.123.231101

Title: Model-Independent Determination of H-0 and Omega(K0) from Strong Lensing and Type Ia Supernovae
Author: Collett, Thomas; Montanari, Francesco; Räsänen, Syksy
Other contributor: University of Helsinki, Department of Physics

Date: 2019-12-02
Language: eng
Number of pages: 7
Belongs to series: Physical Review Letters
ISSN: 0031-9007
DOI: https://doi.org/10.1103/PhysRevLett.123.231101
URI: http://hdl.handle.net/10138/309999
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 Friedmann-Lemaitre-Robertson-Walker (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(-4.4)(+4.5) km/s/Mpc and Omega(K0) = 0.12(-0.25)(+0.27). 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(-3.8)(+4.2) km/s/Mpc and Omega(K0) = 0.18(-0.18)(+0.25). Assuming a zero spatial curvature, we get H-0 = 74.2(-2.9)(+3.0) km/s/Mpc, a precision of 4%. The measurements also provide a consistency test of the FLRW metric: we find no evidence against it.
Subject: HUBBLE CONSTANT
COSMIC ACCELERATION
DISTANCE
CONSTRAINTS
GALAXIES
CALIBRATION
CURVATURE
PRECISION
LIGHT
FIELD
115 Astronomy, Space science
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
Model_independent.pdf 460.7Kb PDF View/Open
PhysRevLett.123.231101.pdf 268.5Kb PDF View/Open

This item appears in the following Collection(s)

Show full item record