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Article Dans Une Revue Astronomy and Astrophysics - A&A Année : 2023

Growth-rate measurement with type-Ia supernovae using ZTF survey simulations

Suhail Dhawan
  • Fonction : Auteur
Ariel Goobar
  • Fonction : Auteur
Richard Dekany
  • Fonction : Auteur
Steven L Groom
  • Fonction : Auteur
Niharika Sravan
  • Fonction : Auteur
Frank J Masci
  • Fonction : Auteur
Josiah Purdum
  • Fonction : Auteur

Résumé

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 derive constraints on $f\sigma_8$ 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 $f\sigma_8$ 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.

Dates et versions

hal-04021219 , version 1 (09-03-2023)

Identifiants

Citer

Bastien Carreres, Julian E Bautista, Fabrice Feinstein, Dominique Fouchez, Benjamin Racine, et al.. Growth-rate measurement with type-Ia supernovae using ZTF survey simulations. Astronomy and Astrophysics - A&A, 2023, 674, pp.A197. ⟨10.1051/0004-6361/202346173⟩. ⟨hal-04021219⟩
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