The redshift dependence of the inferred H0 in a local void solution to the Hubble tension

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10509453" target="_blank" >RIV/00216208:11320/25:10509453 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=iQI~1aLE-N" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=iQI~1aLE-N</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnras/stae2758" target="_blank" >10.1093/mnras/stae2758</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The redshift dependence of the inferred H0 in a local void solution to the Hubble tension

Popis výsledku v původním jazyce

Galaxy number counts suggest that we are located within the Gpc-scale KBC void. The Hubble tension might arise due to gravitationally driven outflow from this void, as explored in detail by Haslbauer et al. We explore how the impact of the void on redshift decays at large distances. We define H-0(z) as the present expansion rate H-0 that would be inferred from observations in a narrow redshift range centred on z. We find H-0(z) in three different ways, all of which give similar results. We then compare these results with the observations of Jia et al., who were careful to minimize the impact of correlations between H0 measurements from data in different redshift bins. We find reasonable agreement with their results for the Gaussian and exponential void underdensity profiles, although the agreement is less good in the Maxwell-Boltzmann case. The latter profile causes severe disagreement with the observed bulk flow curve at z&lt;0.1 (Mazurenko et al.), so the tension with higher redshift data further highlights that the deepest part of the KBC void is probably near its centre. The observations show a decline of H-0(z) towards the background Planck value in qualitative agreement with the considered models, even if we use a larger void. The good overall agreement with the recent results of Jia et al. suggests that the local supervoid evident from the galaxy luminosity density out to a Gpc might also solve the Hubble tension while retaining a low background H-0 consistent with Planck data, assuming enhanced structure formation on &gt;100 Mpc scales.

Název v anglickém jazyce

The redshift dependence of the inferred H0 in a local void solution to the Hubble tension

Popis výsledku anglicky

Galaxy number counts suggest that we are located within the Gpc-scale KBC void. The Hubble tension might arise due to gravitationally driven outflow from this void, as explored in detail by Haslbauer et al. We explore how the impact of the void on redshift decays at large distances. We define H-0(z) as the present expansion rate H-0 that would be inferred from observations in a narrow redshift range centred on z. We find H-0(z) in three different ways, all of which give similar results. We then compare these results with the observations of Jia et al., who were careful to minimize the impact of correlations between H0 measurements from data in different redshift bins. We find reasonable agreement with their results for the Gaussian and exponential void underdensity profiles, although the agreement is less good in the Maxwell-Boltzmann case. The latter profile causes severe disagreement with the observed bulk flow curve at z&lt;0.1 (Mazurenko et al.), so the tension with higher redshift data further highlights that the deepest part of the KBC void is probably near its centre. The observations show a decline of H-0(z) towards the background Planck value in qualitative agreement with the considered models, even if we use a larger void. The good overall agreement with the recent results of Jia et al. suggests that the local supervoid evident from the galaxy luminosity density out to a Gpc might also solve the Hubble tension while retaining a low background H-0 consistent with Planck data, assuming enhanced structure formation on &gt;100 Mpc scales.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

1365-2966

Svazek periodika

536

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

3232-3241

Kód UT WoS článku

001389486900001

EID výsledku v databázi Scopus

2-s2.0-85215658777