The KBC void and Hubble tension contradict Lambda CDM on a Gpc scale - Milgromian dynamics as a possible solution

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10423413" target="_blank" >RIV/00216208:11320/20:10423413 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=h.04H77Tdb" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=h.04H77Tdb</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnras/staa2348" target="_blank" >10.1093/mnras/staa2348</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The KBC void and Hubble tension contradict Lambda CDM on a Gpc scale - Milgromian dynamics as a possible solution

Popis výsledku v původním jazyce

The KBC void is a local underdensity with the observed relative density contrast delta equivalent to 1 - rho/rho(0) = 0.46 +/- 0.06 between 40 and 300 Mpc around the Local Group. If mass is conserved in the Universe, such a void could explain the 5.3 sigma Hubble tension. However, the MXXL simulation shows that the KBC void causes 6.04s tension with standard cosmology (Lambda CDM). Combined with the Hubble tension, Lambda CDM is ruled out at 7.09 sigma confidence. Consequently, the density and velocity distribution onGpc scales suggest a long-range modification to gravity. In this context, we consider a cosmologicalMONDmodel supplemented with 11 eV/c(2) sterile neutrinos. We explain why this.HDM model has a nearly standard expansion history, primordial abundances of light elements, and cosmic microwave background (CMB) anisotropies. InMOND, structure growth is self-regulated by external fields from surrounding structures. We constrain our model parameters with the KBC void density profile, the local Hubble and deceleration parameters derived jointly from supernovae at redshifts 0.023-0.15, time delays in strong lensing systems, and the Local Group velocity relative to the CMB. Our best-fitting model simultaneously explains these observables at the 1.14 per cent confidence level (2.53 sigma tension) if the void is embedded in a time-independent external field of 0.055 a(0). Thus, we show for the first time that the KBC void can naturally resolve the Hubble tension in Milgromian dynamics. Given the many successful a priori MOND predictions on galaxy scales that are difficult to reconcile with Lambda CDM, Milgromian dynamics supplemented by 11 eV/c(2) sterile neutrinos may provide a more holistic explanation for astronomical observations across all scales.

Název v anglickém jazyce

The KBC void and Hubble tension contradict Lambda CDM on a Gpc scale - Milgromian dynamics as a possible solution

Popis výsledku anglicky

The KBC void is a local underdensity with the observed relative density contrast delta equivalent to 1 - rho/rho(0) = 0.46 +/- 0.06 between 40 and 300 Mpc around the Local Group. If mass is conserved in the Universe, such a void could explain the 5.3 sigma Hubble tension. However, the MXXL simulation shows that the KBC void causes 6.04s tension with standard cosmology (Lambda CDM). Combined with the Hubble tension, Lambda CDM is ruled out at 7.09 sigma confidence. Consequently, the density and velocity distribution onGpc scales suggest a long-range modification to gravity. In this context, we consider a cosmologicalMONDmodel supplemented with 11 eV/c(2) sterile neutrinos. We explain why this.HDM model has a nearly standard expansion history, primordial abundances of light elements, and cosmic microwave background (CMB) anisotropies. InMOND, structure growth is self-regulated by external fields from surrounding structures. We constrain our model parameters with the KBC void density profile, the local Hubble and deceleration parameters derived jointly from supernovae at redshifts 0.023-0.15, time delays in strong lensing systems, and the Local Group velocity relative to the CMB. Our best-fitting model simultaneously explains these observables at the 1.14 per cent confidence level (2.53 sigma tension) if the void is embedded in a time-independent external field of 0.055 a(0). Thus, we show for the first time that the KBC void can naturally resolve the Hubble tension in Milgromian dynamics. Given the many successful a priori MOND predictions on galaxy scales that are difficult to reconcile with Lambda CDM, Milgromian dynamics supplemented by 11 eV/c(2) sterile neutrinos may provide a more holistic explanation for astronomical observations across all 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

2020

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

—

Svazek periodika

499

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

39

Strana od-do

2845-2883

Kód UT WoS článku

000587762900096

EID výsledku v databázi Scopus

2-s2.0-85096590293