Zobrazeno 1 - 10
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pro vyhledávání: '"Plamen P. Fiziev"'
Autor:
Plamen P. Fiziev
Utilizing various gauges of the radial coordinate, we give a General Relativistic (GR) description of static spherically symmetric spacetimes with a massive point source and vacuum outside this singularity. We show that in GR there exists a two-param
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::77e0a1f6537c6e4781f843df95b6d25f
Autor:
Plamen P. Fiziev
Publikováno v:
The Fourteenth Marcel Grossmann Meeting.
We consider singularities of static spherically symmetric objects in minimal dilatonic gravity. They are only partially studied and purely understood even in the simplest models of extended gravity. We introduce the proper form of the structure equat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3df65fafee690b68a80a97ba3fc24cad
https://doi.org/10.1142/9789813226609_0101
https://doi.org/10.1142/9789813226609_0101
Autor:
Plamen P. Fiziev
Publikováno v:
Proceedings of Frontiers of Fundamental Physics 14 — PoS(FFP14).
We present the basic equations and relations for the relativistic static spherically symmetric stars (SSSS) in the model of minimal dilatonic gravity (MDG) which is {\em locally} equivalent to the f(R) theories of gravity and gives an alternative des
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::52573e2357d45b634196008635a3be0e
https://doi.org/10.22323/1.224.0080
https://doi.org/10.22323/1.224.0080
Autor:
Kalin Marinov, Plamen P. Fiziev
The model of minimal dilatonic gravity (MDG), called also the massive Branse-Dicke model with $\omega =0$, is an alternative model of gravitation, which uses one Branse-Dicke gravitation-dilaton field $\Phi$ and offers a simultaneous explanation of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::34294b7ff8c8cebf1ba01113f25b1592
http://arxiv.org/abs/1608.06089
http://arxiv.org/abs/1608.06089
Autor:
Plamen P. Fiziev, Denitsa Staicova
Publikováno v:
Springer Proceedings in Mathematics & Statistics ISBN: 9789811026355
The Heun functions are often called the hypergemeotry successors of the 21st century, because of the wide number of their applications. In this proceeding we discuss their application to the problem of perturbations of rotating and non-rotating black
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::54a25f0e884af295313e8e1ecb918f7b
https://doi.org/10.1007/978-981-10-2636-2_20
https://doi.org/10.1007/978-981-10-2636-2_20
Autor:
Denitsa Staicova, Plamen P. Fiziev
Publikováno v:
Astrophysics and Space Science. 332:385-401
We give a new theoretical basis for examination of the presence of the Kerr black hole (KBH) or the Kerr naked singularity (KNS) in the central engine of different astrophysical objects around which astrophysical jets are typically formed: X-ray bina
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d0c868daf357d97785ec4442e9dae850
https://doi.org/10.1007/s10509-010-0520-x
https://doi.org/10.1007/s10509-010-0520-x
Autor:
Plamen P. Fiziev, Denitsa Staicova
The perturbations of the Kerr metric and the miracle of their exact solutions play a critical role in the comparison of predictions of general relativity with astrophysical observations of compact massive objects. The differential equations governing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6b2c5def762f7aa13011caed5933c8f8
http://arxiv.org/abs/1412.4111
http://arxiv.org/abs/1412.4111
Publikováno v:
Journal of Computational and Applied Mathematics. 145:113-131
We investigate numerically class of models of the static spherically symmetric boson–fermion stars in the scalar-tensor theory of gravity with massive dilaton field. The proper mathematical model of such stars is interpreted as a nonlinear two-para
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::330daad9b19b019eaa6e2552a6884166
https://doi.org/10.1016/s0377-0427(01)00539-8
https://doi.org/10.1016/s0377-0427(01)00539-8
Publikováno v:
Journal of Computational Methods in Sciences and Engineering. 2:245-252
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::286f4f367f77a9121676db44466b9318
https://doi.org/10.3233/jcm-2002-21-234
https://doi.org/10.3233/jcm-2002-21-234
Autor:
Plamen P. Fiziev
We study a novel type of solutions of the general Heun's equation, based on its symmetric form. We derive the symmetry group of this equation which is a proper extension of the Mobius group. The new series solution treat simultaneously and on an equa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1f0ce9cacd4164d06745cf9a401f0843
http://arxiv.org/abs/1409.8385
http://arxiv.org/abs/1409.8385