Improvements in cosmological constraints from breaking growth degeneracy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F20%3A00540714" target="_blank" >RIV/68378271:_____/20:00540714 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1051/0004-6361/202038409" target="_blank" >https://doi.org/10.1051/0004-6361/202038409</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/202038409" target="_blank" >10.1051/0004-6361/202038409</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Improvements in cosmological constraints from breaking growth degeneracy

Popis výsledku v původním jazyce

Context. The key probes of the growth of a large-scale structure are its rate f and amplitude σ8. Redshift space distortions in the galaxy power spectrum allow us to measure only the combination fσ8, which can be used to constrain the standard cosmological model or alternatives. By using measurements of the galaxy-galaxy lensing cross-correlation spectrum or of the galaxy bispectrum, it is possible to break the fσ8 degeneracy and obtain separate estimates of f and σ8 from the same galaxy sample. Currently there are very few such separate measurements, but even this allows for improved constraints on cosmological models.Aims. We explore how having a larger and more precise sample of such measurements in the future could constrain further cosmological models.Methods.

Název v anglickém jazyce

Improvements in cosmological constraints from breaking growth degeneracy

Popis výsledku anglicky

Context. The key probes of the growth of a large-scale structure are its rate f and amplitude σ8. Redshift space distortions in the galaxy power spectrum allow us to measure only the combination fσ8, which can be used to constrain the standard cosmological model or alternatives. By using measurements of the galaxy-galaxy lensing cross-correlation spectrum or of the galaxy bispectrum, it is possible to break the fσ8 degeneracy and obtain separate estimates of f and σ8 from the same galaxy sample. Currently there are very few such separate measurements, but even this allows for improved constraints on cosmological models.Aims. We explore how having a larger and more precise sample of such measurements in the future could constrain further cosmological models.Methods.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

<a href="/cs/project/EF15_003%2F0000437" target="_blank" >EF15_003/0000437: Kosmologie, gravitace a temný sektor vesmíru</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Astronomy & Astrophysics

ISSN

0004-6361

e-ISSN

—

Svazek periodika

642

Číslo periodika v rámci svazku

Oct

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

8

Strana od-do

1-8

Kód UT WoS článku

000581916000006

EID výsledku v databázi Scopus

2-s2.0-85093955980