A simultaneous solution to the Hubble tension and observed bulk flow within 250 h -1 Mpc
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10476067" target="_blank" >RIV/00216208:11320/23:10476067 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=rZTmyWQ-iV" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=rZTmyWQ-iV</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnras/stad3357" target="_blank" >10.1093/mnras/stad3357</a>
Alternative languages
Result language
angličtina
Original language name
A simultaneous solution to the Hubble tension and observed bulk flow within 250 h -1 Mpc
Original language description
The Lambda cold dark matter (Lambda CDM) standard cosmological model is in severe tension with several cosmological observations. Foremost is the Hubble tension, which exceeds 5 sigma confidence. Galaxy number counts show the Keenan-Barger-Cowie (KBC) supervoid, a significant underdensity out to 300 Mpc that cannot be reconciled with Lambda CDM cosmology. Haslbauer et al. previously showed that a high local Hubble constant arises naturally due to gravitationally driven outflows from the observed KBC supervoid. The main prediction of this model is that peculiar velocities are typically much larger than expected in the Lambda CDM framework. This agrees with the recent discovery by Watkins et al. that galaxies in the CosmicFlows-4 catalogue have significantly faster bulk flows than expected in the Lambda CDM model on scales of 100 - 250 h(-1) Mpc. The rising bulk flow curve is unexpected in standard cosmology, causing 4.8 sigma tension at 200 h(-1) Mpc. In this work, we determine what the semi-analytic void model of Haslbauer et al. predicts for the bulk flows on these scales. We find qualitative agreement with the observations, especially if our vantage point is chosen to match the observed bulk flow on a scale of 50 h(-1) Mpc. This represents a highly non-trivial success of a previously published model that was not constrained by bulk flow measurements, but which was shown to solve the Hubble tension and explain the KBC void consistently with the peculiar velocity of the Local Group. Our results suggest that several cosmological tensions can be simultaneously resolved if structure grows more efficiently than in the Lambda CDM paradigm on scales of tens to hundreds of Mpc.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - 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)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Monthly Notices of the Royal Astronomical Society
ISSN
0035-8711
e-ISSN
1365-2966
Volume of the periodical
527
Issue of the periodical within the volume
3
Country of publishing house
GB - UNITED KINGDOM
Number of pages
9
Pages from-to
4388-4396
UT code for WoS article
001112228300001
EID of the result in the Scopus database
2-s2.0-85179681827