On exact analytical solution of Einstein-Maxwell-scalar field equations
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19630%2F21%3AA0000141" target="_blank" >RIV/47813059:19630/21:A0000141 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S2212686421000984?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2212686421000984?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.dark.2021.100868" target="_blank" >10.1016/j.dark.2021.100868</a>
Alternative languages
Result language
angličtina
Original language name
On exact analytical solution of Einstein-Maxwell-scalar field equations
Original language description
The exact analytical solution of Einstein-Maxwell-scalar (EMS) field equations has been explored which covers several well-known solutions such as the Reissner-Nordstrom, Schwarzschild-MOG (Modified Gravity), Janis-Newman-Winicour, and Schwarzschild solutions. It has been assumed that the interactions between the tensor, vector, and scalar fields are negligible. The newly obtained solution is characterized by three free parameters as the total mass M, electric (magnetic) charge Q(e) (Q(m)), and scalar charge C (or n parameter) of the gravitational compact object. It is also shown that dual solution for the vector potential A(phi) = Q(m) cos theta is satisfied by the EMS field equations and the electric charge can be safely replaced by magnetic charge Q(m). Finally, we have studied curvature invariants and test particle motion around the gravitational source described the obtained new spacetime metric. We have also provided analysis of degeneracy values of spin parameter of the rotating Kerr black hole and charge parameter of compact object described by the new spacetime metric through comparison of radii of ISCO, photonsphere and energy efficiency. It is shown that new black hole solution in Einstein-Maxwell-scalar field theory can mimic spin parameter of the Kerr black hole up to a(*) less than or similar to 0.6 while the astrophysical black hole' observations that it reaches up to a(*) less than or similar to 0.99. Consequently, one may conclude that the obtained new black hole solution can be considered as realistic candidate for the astrophysical black holes with a(*) less than or similar to 0.6.
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
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physics of the Dark Universe
ISSN
2212-6864
e-ISSN
—
Volume of the periodical
33
Issue of the periodical within the volume
September
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
8
Pages from-to
„100868-“-„100868-8“
UT code for WoS article
000704383100031
EID of the result in the Scopus database
2-s2.0-85112766314