Redshift-space distortions in massive neutrinos cosmologies

We study the Kaiser formula for biased tracers in massive neutrino cosmologies by comparing its predictions with a large set of N-body simulations. In particular, we examine the ambiguity in the definition of the peculiar velocity contribution at linear level, whether it should be expressed in terms of the total matter velocity field or only the cold-matter component, comprised of cold dark matter and baryons. We revisit and extend previous qualitative studies on the topic with larger statistics and including a full fit of halo power spectrum and halo-matter cross-power spectrum measurements. We find clear evidence that the clustering of halos in redshift space is correctly described assuming that halo velocity is tracing the velocity field of cold-matter. The opposite assumption provides a worse fit to the simulated data and can lead to a spurious running of nuisance parameters in the perturbative galaxy power spectrum model.

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Publication Details

Journal
Physical review. D/Physical review. D.
Published
2025-08-29
DOI
https://doi.org/10.1103/mjsv-885q
Citations
2
Primary Topic
Astrophysics and Cosmic Phenomena
Type
article
Field-Weighted Citation Impact
3.74

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article

Redshift-space distortions in massive neutrinos cosmologies

Emilio Bellini, E. Sefusatti, Matteo Viel, C. Carbone et al.
2 citations
Physical review. D/Physical review. D.
Astrophysics and Cosmic Phenomena
3.74
article

Redshift-space distortions in massive neutrinos cosmologies

Emilio Bellini, E. Sefusatti, Matteo Viel, C. Carbone, Chiara Moretti, Francesco Verdiani
article en
2 citations

Abstract

We study the Kaiser formula for biased tracers in massive neutrino cosmologies by comparing its predictions with a large set of N-body simulations. In particular, we examine the ambiguity in the definition of the peculiar velocity contribution at linear level, whether it should be expressed in terms of the total matter velocity field or only the cold-matter component, comprised of cold dark matter and baryons. We revisit and extend previous qualitative studies on the topic with larger statistics and including a full fit of halo power spectrum and halo-matter cross-power spectrum measurements. We find clear evidence that the clustering of halos in redshift space is correctly described assuming that halo velocity is tracing the velocity field of cold-matter. The opposite assumption provides a worse fit to the simulated data and can lead to a spurious running of nuisance parameters in the perturbative galaxy power spectrum model.

Physical review. D/Physical review. D.Vol. 112(4)
Scuola Internazionale Superiore di Studi Avanzati (IT), University of Nova Gorica (SI), Trieste Astronomical Observatory (IT), Istituto di Astrofisica Spaziale e Fisica Cosmica di Milano (IT), Istituto Nazionale di Fisica Nucleare, Sezione di Trieste (IT), Institute for Fundamental Physics of the Universe (IT), Fondazione ICSC Centro Nazionale di Ricerca in High Performance Computing, Big Data e Quantum Computing
Ministero dell'Università e della Ricerca, Horizon 2020 Framework Programme, Instituto Nazionale di Fisica Nucleare, HORIZON EUROPE Marie Sklodowska-Curie Actions
Openalex Percentile: Top 7%
Astrophysics and Cosmic Phenomena
3.74
DOISourceOpenAlex
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Redshift-space distortions in massive neutrinos cosmologies — Emilio Bellini, E. Sefusatti, et al. · Physical review. D/Physical review. D. (2025) | TGRS Research Map | TGRS