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SUMMARY:Constraining growth rate from SNIa peculiar velocities and galaxy 
 density field
DTSTART:20250401T120000Z
DTEND:20250401T140000Z
DTSTAMP:20260614T075000Z
UID:indico-event-35612@indico.in2p3.fr
DESCRIPTION:Speakers: Corentin Ravoux (LPC Clermont-Ferrand CNRS/IN2P3)\n\
 nUsing the peculiar velocities of type Ia supernovae (SNe Ia) to infer the
  growth rate of structure (f) has seen a significant gain in interest. Rec
 ent simulations (Carreres et al. 2023) have shown the potential constraint
 s achievable using ZTF SNe Ia. Maximizing the potential of growth rate con
 straints can be achieved by coupling peculiar velocities with the impact o
 f those velocities on the underlying density field\, called redshift space
  distortion (RSD). A recent development (Ravoux et al. 2025\, flip softwar
 e https://github.com/corentinravoux/flip) allows this measurement to be pe
 rformed with a likelihood-based field-level inference method. This framewo
 rk allows for fast analytical field covariance matrix generation for vario
 us recent models\, as well as the simultaneous inference of cosmological a
 nd nuisance parameters. Currently\, this software is being tested to measu
 re the fσ8 combination with Pantheon+ data (Carr et al. in prep.)\, on LS
 ST simulations (Rosselli et al. in prep.\, Carrerres et al. in prep.)\, an
 d on simulations coupling ZTF SN Ia with DESI bright galaxy field (Ravoux 
 et al. in prep.). I will give a general presentation of the use of peculia
 r velocities for growth rate inference\, the core concepts of the flip sof
 tware\, and the results associated with the previously mentioned studies.\
 n\nhttps://indico.in2p3.fr/event/35612/
URL:https://indico.in2p3.fr/event/35612/
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