Final published version
Licence: CC BY: Creative Commons Attribution 4.0 International License
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Growth-rate measurement with type-Ia supernovae using ZTF survey simulations
AU - Zwicky Transient Facility
AU - Carreres, Bastien
AU - Bautista, Julian E.
AU - Feinstein, Fabrice
AU - Fouchez, Dominique
AU - Racine, Benjamin
AU - Smith, Mathew
AU - Amenouche, Melissa
AU - Aubert, Marie
AU - Dhawan, Suhail
AU - Ginolin, Madeleine
AU - Goobar, Ariel
AU - Gris, Philippe
AU - Lacroix, Leander
AU - Nuss, Eric
AU - Regnault, Nicolas
AU - Rigault, Mickael
AU - Robert, Estelle
AU - Rosnet, Philippe
AU - Sommer, Kelian
AU - Dekany, Richard
AU - Groom, Steven L.
AU - Sravan, Niharika
AU - Masci, Frank J.
AU - Purdum, Josiah
PY - 2023/6/30
Y1 - 2023/6/30
N2 - Measurements of the growth rate of structures at zâ <â 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 fÏ 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 zâ <â 0.06, we obtained unbiased estimates of fÏ 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.
AB - Measurements of the growth rate of structures at zâ <â 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 fÏ 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 zâ <â 0.06, we obtained unbiased estimates of fÏ 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.
U2 - 10.1051/0004-6361/202346173
DO - 10.1051/0004-6361/202346173
M3 - Journal article
VL - 674
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
SN - 1432-0746
M1 - A197
ER -