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New constraints on the linear growth rate using cosmic voids in the SDSS DR12 datasets

Abstract : We present a new analysis of the inferred growth rate of cosmic structure measured around voids, using the LOWZ and the CMASS samples in the 12th data release (DR12) of SDSS. Using a simple multipole analysis we recover a value consistent with ΛCDM for the inferred linear growth rate normalized by the linear bias: the β parameter. We find β=0.33±0.11 for the LOWZ sample and β=0.36±0.05 for the CMASS sample. This work demonstrates that we can expect redshift-space distortions around voids to provide unbiased and accurate constraints on the growth rate, complementary to galaxy clustering, using simple linear modeling.
Keywords : Cosmology
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https://hal.archives-ouvertes.fr/hal-02080710
Contributor : Inspire Hep <>
Submitted on : Wednesday, March 27, 2019 - 3:40:09 AM
Last modification on : Wednesday, October 28, 2020 - 3:15:19 AM

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Ixandra Achitouv. New constraints on the linear growth rate using cosmic voids in the SDSS DR12 datasets. Phys.Rev.D, 2019, 100 (12), pp.123513. ⟨10.1103/PhysRevD.100.123513⟩. ⟨hal-02080710⟩

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