WFRF:(Font Ribera Andreu)
Search: WFRF:(Font Ribera Andreu) > (2020) > Massive neutrinos a...
- 1 of 1
- Previous record
- Next record
- To hitlist
Massive neutrinos and degeneracies in Lyman-alpha forest simulations
- Pedersen, Christian (author)
- Font-Ribera, Andreu (author)
- Kitching, Thomas D. (author)
- show more...
- McDonald, Patrick (author)
- Bird, Simeon (author)
- Slosar, Anze (author)
- Pontzen, Andrew (author)
- show less...
- (creator_code:org_t)
- 2020-04-17
- 2020
- English.
- In: Journal of Cosmology and Astroparticle Physics. - : IOP Publishing. - 1475-7516. ; :4
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- Using a suite of hydrodynamical simulations with cold dark matter, baryons, and neutrinos, we present a detailed study of the effect of massive neutrinos on the 1-D and 3-D flux power spectra of the Lyman-alpha (Ly alpha) forest. The presence of massive neutrinos in cosmology induces a scale- and time-dependent suppression of structure formation that is strongest on small scales. Measuring this suppression is a key method for inferring neutrino masses from cosmological data, and is one of the main goals of ongoing and future surveys like eBOSS, DES, LSST, Euclid or DESI. The clustering in the Ly alpha forest traces the quasilinear power at late times and on small scales. In combination with observations of the cosmic microwave background, the forest therefore provides some of the tightest constraints on the sum of the neutrino masses. However there is a well-known degeneracy between Sigma m(v) and the amplitude of perturbations in the linear matter power spectrum. We study the corresponding degeneracy in the 1-D flux power spectrum of the Ly alpha forest, and for the first time also study this degeneracy in the 3-D flux power spectrum. We show that the non-linear effects of massive neutrinos on the Lycy forest, beyond the effect of linear power amplitude suppression, are negligible, and this degeneracy persists in the Ly alpha forest observables to a high precision. We discuss the implications of this degeneracy for choosing parametrisations of the Ly alpha forest for cosmological analysis.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- Lyman alpha forest
- cosmological neutrinos
- cosmological simulations
- neutrino masses from cosmology
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
- Journal of Cosmology and Astroparticle Physics (Search for host publication in LIBRIS)
To the university's database
- 1 of 1
- Previous record
- Next record
- To hitlist
Find more in SwePub
- By the author/editor
- Pedersen, Christ ...
- Font-Ribera, And ...
- Kitching, Thomas ...
- McDonald, Patric ...
- Bird, Simeon
- Slosar, Anze
- show more...
- Rogers, Keir K.
- Pontzen, Andrew
- show less...
- About the subject
-
- NATURAL SCIENCES
- NATURAL SCIENCES
- and Physical Science ...
- Articles in the publication
- Journal of Cosmo ...
- By the university
- Stockholm University
Search outside SwePub
- Extend your search to:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - National Library Systems
- LIBRIS.kb.se
