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Large data set of lensed quasars: higher accuracy on H0? The angular structures viewpoint

Published online by Cambridge University Press:  04 March 2024

Lyne Van de Vyvere Open the ORCID record for Lyne Van de Vyvere [Opens in a new window]
Lyne Van de Vyvere*
Affiliation:
Univerity of Liège STAR Institute, Quartier Agora - Allée du six Août, 19c B-4000 Liège, Belgium
*
email: lyne.vandevyvere@uliege.be
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Abstract

Thanks to forthcoming large-scale surveys, a tremendous number of strong lenses will be discovered in the coming years. The gain in accuracy on H0 from such a large population of lensed quasars is a key question for the future of time-delay cosmography. In such context, lensed systems will have to be modeled in an automated way, with models that are sufficiently generic to apply to every lens. I explore the biases that may arise from unaccounted-for azimuthal structures in mass models. The non-modeled twists in lensing galaxies are expected to bias the shear inference but not H0. Disregarded ellipticity gradients, boxyness and discyness may impact the cosmological inference on a lens-by-lens basis. Nevertheless, the diversity of azimuthal mass profile in lenses balances the bias at a population level and the H0 inference can thus benefits from such large surveys.

Keywords

gravitational lensinggalaxies: elliptical and lenticularcDgalaxies: statisticscosmological parametersmethods: numerical
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S381: Strong Gravitational Lensing in the Era of Big Data , December 2022 , pp. 120 - 124
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

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