Cluster counts: calibration issue or new physics?

Kód výsledku v IS VaVaI

RIV/68378271:_____/18:00502098 - isvavai.cz

Výsledek na webu

http://dx.doi.org/10.1051/0004-6361/201833151

DOI - Digital Object Identifier

10.1051/0004-6361/201833151

Jazyk výsledku

angličtina

Název v původním jazyce

Cluster counts: calibration issue or new physics?

Popis výsledku v původním jazyce

In recent years, the amplitude of matter fluctuations inferred from low-redshift probes has been found to be generally lower than the value derived from cosmic microwave background (CMB) observations in the ΛCDM model. This tension has been exemplified by Sunyaev-Zel’dovich and X-ray cluster counts which, when using their Planck standard cluster mass calibration, yield a value of σ8, appreciably lower than estimations based on the latest Planck CMB measurements. In this work we examine whether non-minimal neutrino masses can alleviate this tension substantially. We used the cluster X-ray temperature distribution function derived from a flux-limited sample of local X-ray clusters, combined with Planck CMB measurements. These datasets were compared to ΛCDM predictions based on recent mass function, adapted to account for the effects of massive neutrinos.

Název v anglickém jazyce

Cluster counts: calibration issue or new physics?

Popis výsledku anglicky

In recent years, the amplitude of matter fluctuations inferred from low-redshift probes has been found to be generally lower than the value derived from cosmic microwave background (CMB) observations in the ΛCDM model. This tension has been exemplified by Sunyaev-Zel’dovich and X-ray cluster counts which, when using their Planck standard cluster mass calibration, yield a value of σ8, appreciably lower than estimations based on the latest Planck CMB measurements. In this work we examine whether non-minimal neutrino masses can alleviate this tension substantially. We used the cluster X-ray temperature distribution function derived from a flux-limited sample of local X-ray clusters, combined with Planck CMB measurements. These datasets were compared to ΛCDM predictions based on recent mass function, adapted to account for the effects of massive neutrinos.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

EF15_003/0000437: Kosmologie, gravitace a temný sektor vesmíru

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Astronomy & Astrophysics

ISSN

1432-0746

e-ISSN

—

Svazek periodika

620

Číslo periodika v rámci svazku

Nov

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

12

Strana od-do

1-2

Kód UT WoS článku

000452389700001

EID výsledku v databázi Scopus

2-s2.0-85057757406