On the initial conditions of the νHDM cosmological model

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10510230" target="_blank" >RIV/00216208:11320/25:10510230 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=F_vyz0djyD" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=F_vyz0djyD</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnras/staf1041" target="_blank" >10.1093/mnras/staf1041</a>

Jazyk výsledku

angličtina

Název v původním jazyce

On the initial conditions of the νHDM cosmological model

Popis výsledku v původním jazyce

The nu HDM is the only cosmological model based on Milgromian dynamics (MOND) with available structure formation simulations. While MOND accounts for galaxies, with a priori predictions for spirals and ellipticals, a light sterile neutrino of 11 eV can assist in recovering scaling relations on the galaxy-cluster scales. In order to perform MONDian cosmological simulations in this theoretical approach, initial conditions derived from a fit to the angular power spectrum of cosmic microwave background (CMB) fluctuations are required. In this work, we employ CosmoSIS to perform a Bayesian study of the nu HDM model. Using the best-fitting values of the posterior, the CMB power spectrum is re-evaluated. The excess of power in the transfer function implies a distinct evolution scenario, which can be used further as an input for a set of hydro-dynamical calculations. The resulting values H-0 approximate to 56 km s(-1) Mpc(-1) and Omega(m0)approximate to 0.5 are far from agreement with respect to the best-fitting ones in the canonical Cold Dark Matter model, but may be significant in MONDian cosmology. The assumed Planck CMB initial conditions are only valid for the lambda cold dark matter (Lambda CDM) cosmology. This work constitutes a first step in an iterative procedure needed to disentangle the model dependence of the derived initial density and velocity fields.

Název v anglickém jazyce

On the initial conditions of the νHDM cosmological model

Popis výsledku anglicky

The nu HDM is the only cosmological model based on Milgromian dynamics (MOND) with available structure formation simulations. While MOND accounts for galaxies, with a priori predictions for spirals and ellipticals, a light sterile neutrino of 11 eV can assist in recovering scaling relations on the galaxy-cluster scales. In order to perform MONDian cosmological simulations in this theoretical approach, initial conditions derived from a fit to the angular power spectrum of cosmic microwave background (CMB) fluctuations are required. In this work, we employ CosmoSIS to perform a Bayesian study of the nu HDM model. Using the best-fitting values of the posterior, the CMB power spectrum is re-evaluated. The excess of power in the transfer function implies a distinct evolution scenario, which can be used further as an input for a set of hydro-dynamical calculations. The resulting values H-0 approximate to 56 km s(-1) Mpc(-1) and Omega(m0)approximate to 0.5 are far from agreement with respect to the best-fitting ones in the canonical Cold Dark Matter model, but may be significant in MONDian cosmology. The assumed Planck CMB initial conditions are only valid for the lambda cold dark matter (Lambda CDM) cosmology. This work constitutes a first step in an iterative procedure needed to disentangle the model dependence of the derived initial density and velocity fields.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

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

541

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

14

Strana od-do

784-797

Kód UT WoS článku

001523415200001

EID výsledku v databázi Scopus

2-s2.0-105010489015