Deshpande, AC;
Kitching, TD;
(2021)
Cosmological parameter biases from Doppler-shifted weak lensing in stage IV experiments.
Physical Review D
, 103
(12)
, Article 123510. 10.1103/PhysRevD.103.123510.
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Abstract
The advent of stage IV weak lensing surveys will open up a new era in precision cosmology. These experiments will offer more than an order-of-magnitude leap in precision over existing surveys, and we must ensure that the accuracy of our theory matches this. Accordingly, it is necessary to explicitly evaluate the impact of the theoretical assumptions made in current analyses on upcoming surveys. One effect typically neglected in present analyses is the Doppler shift of the measured source comoving distances. Using Fisher matrices, we calculate the biases on the cosmological parameter values inferred from a Euclid-like survey, if the correction for this Doppler shift is omitted. We find that this Doppler shift can be safely neglected for stage IV surveys.
| Type: | Article |
|---|---|
| Title: | Cosmological parameter biases from Doppler-shifted weak lensing in stage IV experiments |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevD.103.123510 |
| Publisher version: | https://doi.org/10.1103/PhysRevD.103.123510 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10130098 |
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