Considering light–matter interactions in the Friedmann equations

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F22%3A00557438" target="_blank" >RIV/67985530:_____/22:00557438 - isvavai.cz</a>

Result on the web

<a href="https://royalsocietypublishing.org/doi/epdf/10.1098/rspa.2022.0045" target="_blank" >https://royalsocietypublishing.org/doi/epdf/10.1098/rspa.2022.0045</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1098/rspa.2022.0045" target="_blank" >10.1098/rspa.2022.0045</a>

Result language

angličtina

Original language name

Considering light–matter interactions in the Friedmann equations

Original language description

Recent observations indicate that the Universe is not transparent but partially opaque due to absorption of light by ambient cosmic dust. This implies that the Friedmann equations valid for the transparent universe must be modified for the opaque universe. This paper studies a scenario in which the opacity rises with redshift. In this case, the light-matter interactions become important, because cosmic opacity produces radiation pressure that counterbalances gravitational forces. The presented theoretical model assumes the Universe is expanding according to the standard FLRW metric but with the scale factor a(t) depending on both types of forces: gravity as well as radiation pressure. The modified Friedmann equations predict a cyclic expansion/contraction evolution of the Universe within a limited range of scale factors with no initial singularity. The model avoids dark energy and removes some other tensions of the standard cosmological model. The paper demonstrates that considering light-matter interactions in cosmic dynamics is crucial and can lead to new cosmological models essentially different from the standard lambda CDM model. This emphasizes the necessity of new observations and studies of cosmic opacity and cosmic dust at high redshifts for more realistic modelling of the evolution of the Universe.

Czech name

—

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

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

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

Name of the periodical

Proceedings of the Royal Society A-Mathematical Physical and Engineering Sciences

ISSN

1364-5021

e-ISSN

1471-2946

Volume of the periodical

478

Issue of the periodical within the volume

2261

Country of publishing house

GB - UNITED KINGDOM

Number of pages

25

Pages from-to

20220045

UT code for WoS article

000793458000003

EID of the result in the Scopus database

2-s2.0-85130314259