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- W3102630542 abstract "We investigate the peculiar motions of galaxies up to z = 0.5 using Type Ia supernovae (SNe Ia) from the Large Synoptic Survey Telescope (LSST) and predict the subsequent constraints on the growth rate of structure. We consider two cases. Our first is based on measurements of the volumetric SNe Ia rate and assumes we can obtain spectroscopic redshifts and light curves for varying fractions of objects that are detected pre-peak luminosity by LSST (some of which may be obtained by LSST itself, and others that would require additional follow-up observations). We find that these measurements could produce growth rate constraints at that significantly outperform those found using Redshift Space Distortions (RSD) with DESI or 4MOST, even though there are fewer objects. For our second case, we use semi-analytic simulations and a prescription for the SNe Ia rate as a function of stellar mass and star-formation rate to predict the number of LSST SNe IA whose host redshifts may already have been obtained with the Taipan+WALLABY surveys or with a future multi-object spectroscopic survey. We find ∼18,000 and ∼160,000 SNe Ia with host redshifts for these cases, respectively. While this is only a fraction of the total LSST-detected SNe Ia, they could be used to significantly augment and improve the growth rate constraints compared to only RSD. Ultimately, we find that combining LSST SNe Ia with large numbers of galaxy redshifts will provide the most powerful probe of large-scale gravity in the regime over the coming decades." @default.
- W3102630542 created "2020-11-23" @default.
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- W3102630542 date "2017-09-29" @default.
- W3102630542 modified "2023-10-15" @default.
- W3102630542 title "Measuring the Growth Rate of Structure with Type IA Supernovae from LSST" @default.
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- W3102630542 doi "https://doi.org/10.3847/1538-4357/aa88c8" @default.
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