Traversable wormhole model with massive gravitons, two fluids, and a variable gravity
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F24%3A00616584" target="_blank" >RIV/60077344:_____/24:00616584 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1139/cjp-2023-0033" target="_blank" >https://doi.org/10.1139/cjp-2023-0033</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1139/cjp-2023-0033" target="_blank" >10.1139/cjp-2023-0033</a>
Alternative languages
Result language
angličtina
Original language name
Traversable wormhole model with massive gravitons, two fluids, and a variable gravity
Original language description
We construct a new cosmological model based on relativistic theory of gravity characterized by massive gravitons. The new Friedmann-Robertson-Walker model is characterized by the presence of a static traversable wormhole, massive gravitons, and a variable gravitational coupling constant. To recover the Bianchi identity, a second cosmic fluid is introduced in the theory. Motivated from cosmic dark radiation phenomenological arguments, which suggest that the dynamical component of dark energy could be dominated by a bath of dark radiation, we assume that the original cosmic fluid is radiative, whereas the new cosmic fluid is phantom. The total equation of state of our model is equal to1. The new model is characterized by an effective Hubble parameter. The solutions of the dynamical equations reveal an accelerated universe with a scale factor of hyperbolic type which allows the deceleration parameter to change sign from a decelerating phase to an accelerating phase. We have evaluated the deceleration parameter, the jerk and the present day variations of the gravitational constant which agree with astronomical observations.
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
10102 - Applied mathematics
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Canadian Journal of Physics
ISSN
0008-4204
e-ISSN
1208-6045
Volume of the periodical
102
Issue of the periodical within the volume
5
Country of publishing house
CA - CANADA
Number of pages
7
Pages from-to
271-277
UT code for WoS article
001158514500001
EID of the result in the Scopus database
2-s2.0-85190778156