Article (Scientific journals)
Time-Delay Cosmography: Measuring the Hubble Constant and Other Cosmological Parameters with Strong Gravitational Lensing
Birrer, S.; Millon, M.; Sluse, Dominique et al.
2024In Space Science Reviews, 220, p. 48
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Keywords :
Gravitational lensing; Cosmology; Hubble constant; Dark energy
Abstract :
[en] Multiply lensed images of a same source experience a relative time delay in the arrival of photons due to the path length difference and the different gravitational potentials the photons travel through. This effect can be used to measure absolute distances and the Hubble constant (H<SUB>0</SUB>) and is known as time-delay cosmography. The method is independent of the local distance ladder and early-universe physics and provides a precise and competitive measurement of H<SUB>0</SUB>. With upcoming observatories, time-delay cosmography can provide a 1% precision measurement of H<SUB>0</SUB> and can decisively shed light on the current reported `Hubble tension'. This manuscript details the general methodology developed over the past decades in time-delay cosmography, discusses recent advances and results, and, foremost, provides a foundation and outlook for the next decade in providing accurate and ever more precise measurements with increased sample size and improved observational techniques.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Birrer, S.;  SUNY Stony Brook, New York, Kavli Institute for Particle Astrophysics and Cosmology, California, Kavli Institute for Particle Astrophysics and Cosmology, California
Millon, M.;  Kavli Institute for Particle Astrophysics and Cosmology, California, Ecole Polytechnique Federale de Lausanne, Laboratoire d'Astrophysique, Ecole Polytechnique Federale de Lausanne, Laboratoire d'Astrophysique
Sluse, Dominique  ;  Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) ; STAR Institute, Quartier Agora - Allée du six Août, 19c B-4000, Liège, Belgium
Shajib, A. J.;  University of Chicago, Department of Astronomy and Astrophysics, University of Chicago, Kavli Institute for Cosmological Physics, University of Chicago, Kavli Institute for Cosmological Physics
Courbin, F.;  Ecole Polytechnique Federale de Lausanne, Laboratoire d'Astrophysique, -, Institucio Catalona de Recerca i Estudis Avancats, -, Institucio Catalona de Recerca i Estudis Avancats
Erickson, S.;  Kavli Institute for Particle Astrophysics and Cosmology, California
Koopmans, L. V. E.;  University of Groningen, Kapteyn Astronomical Institute
Suyu, S. H.;  Max-Planck-Institute for Astrophysics, Garching, -, -, -, -
Treu, T.;  University of California, Los Angeles, Department of Physics and Astronomy
Language :
English
Title :
Time-Delay Cosmography: Measuring the Hubble Constant and Other Cosmological Parameters with Strong Gravitational Lensing
Publication date :
01 August 2024
Journal title :
Space Science Reviews
ISSN :
0038-6308
eISSN :
1572-9672
Publisher :
Kluwer Academic Publishers, Nl
Volume :
220
Pages :
48
Peer reviewed :
Peer Reviewed verified by ORBi
European Projects :
H2020 - 787886 - COSMICLENS - Cosmology with Strong Gravitational Lensing
Funders :
EU - European Union
Commentary :
Originally published in open access in Space Science Review - https://link.springer.com/article/10.1007/s11214-024-01079-w
Available on ORBi :
since 09 August 2024

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