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New constraints on the linear growth rate using cosmic voids in the SDSS DR12 datasets
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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 twelfth data release (DR12) of SDSS. Using a simple multipole analysis we recover a value consistent with $\Lambda$CDM for the inferred linear growth rate normalized by the linear bias: the $\beta$ parameter. This is true in both the mock catalogues and the data, where we find $\beta=0.33\pm0.06$ for the LOWZ sample and $\beta=0.36\pm0.05$ 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 modelling.
Forward citations
Cited by 3 Pith papers
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Why Cosmic Voids Matter: Pristine Evolution
Cosmic voids traced by halos become stable at late times, and the matter around them evolves linearly, supporting their use as clean dark-energy probes.
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Cosmic voids evolution in modified gravity via hydrodynamics
Voids in luminal Galileon gravity are always unscreened, and a reality requirement on the fifth force rules out ~82% of the favored parameter space, yielding a redshift-dependent minimum void depth.
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Dark Energy Survey Year 1 results: The relationship between mass and light around cosmic voids
Around cosmic voids in DES Year 1 data, the galaxy and matter density profiles have the same radial shape, supporting a single scale-independent galaxy bias.
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