| Issue |
A&A
Volume 674, June 2023
|
|
|---|---|---|
| Article Number | A197 | |
| Number of page(s) | 18 | |
| Section | Cosmology (including clusters of galaxies) | |
| DOI | https://doi.org/10.1051/0004-6361/202346173 | |
| Published online | 21 June 2023 | |
Growth-rate measurement with type-Ia supernovae using ZTF survey simulations
1
Aix-Marseille Univ., CNRS/IN2P3, CPPM, 163 avenue de Luminy, 13009 Marseille, France
e-mail: carreres@cppm.in2p3.fr
2
Univ. Lyon, Univ. Claude Bernard Lyon 1, CNRS/IN2P3, IP2I Lyon, 4 rue Enrico Fermi, 69622 Villeurbanne, France
3
Université Clermont Auvergne, CNRS/IN2P3, LPC, 4 avenue Blaise Pascal, 63000 Clermont-Ferrand, France
4
Institute of Astronomy and Kavli Institute for Cosmology, University of Cambridge, Madingley Road, Cambridge, CB3 0HA
UK
5
The Oskar Klein Centre, Department of Physics, Stockholm University, Albanova University Center, 106 91 Stockholm, Sweden
6
LPNHE, CNRS/IN2P3, Sorbonne Université, Paris Diderot, Laboratoire de Physique Nucléaire et de Hautes Énergies, 4 place Jussieu, 75005 Paris, France
7
Laboratoire Univers et Particules de Montpellier, Université de Montpellier, CNRS-IN2P3, Place Eugène Bataillon, 34090 Montpellier, France
8
Caltech Optical Observatories, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA, 91125
USA
9
IPAC, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA, 91125
USA
Received:
17
February
2023
Accepted:
26
April
2023
Measurements of the growth rate of structures at z < 0.1 with peculiar velocity surveys have the potential of testing the validity of general relativity on cosmic scales. In this work, we present growth-rate measurements from realistic simulated sets of type-Ia supernovae (SNe Ia) from the Zwicky Transient Facility (ZTF). We describe our simulation methodology, the light-curve fitting, and peculiar velocity estimation. Using the maximum likelihood method, we derived constraints on fσ8 using only ZTF SN Ia peculiar velocities. We carefully tested the method and we quantified biases due to selection effects (photometric detection, spectroscopic follow-up for typing) on several independent realizations. We simulated the equivalent of 6 years of ZTF data, and considering an unbiased spectroscopically typed sample at z < 0.06, we obtained unbiased estimates of fσ8 with an average uncertainty of 19% precision. We also investigated the information gain in applying bias correction methods. Our results validate our framework, which can be used on real ZTF data.
Key words: large-scale structure of Universe / cosmological parameters / supernovae: general / gravitation
© The Authors 2023
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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