Cosmic transit in phantom massive Chern-Simons models: confrontations with astronomical observations

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F25%3A43910086" target="_blank" >RIV/60076658:12310/25:43910086 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.worldscientific.com/doi/10.1142/S0217732325500853" target="_blank" >https://www.worldscientific.com/doi/10.1142/S0217732325500853</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1142/S0217732325500853" target="_blank" >10.1142/S0217732325500853</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Cosmic transit in phantom massive Chern-Simons models: confrontations with astronomical observations

Popis výsledku v původním jazyce

We study a two-fluid cosmological model in the context of a dynamical Chern-Simons modified massive gravity with a time-varying gravitation predicted from recent astronomical observations. The solutions of the Friedmann equation are hyperbolically characterized by a cosmic transition from deceleration to acceleration and a jerk parameter which tends toward unity at late times. We have discussed two independent cases characterized by both hyperbolic evolution of the scale factor and graviton mass m approximate to 10-33eV. Both models predict a very slow evolution of the gravitational constant and the crossing of the phantom-divide line. Confrontations with various recent astronomical observations including BBN+PP+BAO+SHOES data sets have been done to estimate the parameters of the model.

Název v anglickém jazyce

Cosmic transit in phantom massive Chern-Simons models: confrontations with astronomical observations

Popis výsledku anglicky

We study a two-fluid cosmological model in the context of a dynamical Chern-Simons modified massive gravity with a time-varying gravitation predicted from recent astronomical observations. The solutions of the Friedmann equation are hyperbolically characterized by a cosmic transition from deceleration to acceleration and a jerk parameter which tends toward unity at late times. We have discussed two independent cases characterized by both hyperbolic evolution of the scale factor and graviton mass m approximate to 10-33eV. Both models predict a very slow evolution of the gravitational constant and the crossing of the phantom-divide line. Confrontations with various recent astronomical observations including BBN+PP+BAO+SHOES data sets have been done to estimate the parameters of the model.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10201 - Computer sciences, information science, bioinformathics (hardware development to be 2.2, social aspect to be 5.8)

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

MODERN PHYSICS LETTERS A

ISSN

0217-7323

e-ISSN

1793-6632

Svazek periodika

40

Číslo periodika v rámci svazku

24

Stát vydavatele periodika

SG - Singapurská republika

Počet stran výsledku

21

Strana od-do

nestránkováno

Kód UT WoS článku

001490284100001

EID výsledku v databázi Scopus

2-s2.0-105005643414