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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

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

Name of the periodical

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

1365-2966

Volume of the periodical

536

Issue of the periodical within the volume

4

Country of publishing house

GB - UNITED KINGDOM

Number of pages

10

Pages from-to

3232-3241

UT code for WoS article

001389486900001

EID of the result in the Scopus database

2-s2.0-85215658777