Zobrazeno 1 - 10
of 83
pro vyhledávání: '"Dimitry Ayzenberg"'
Autor:
Temurbek Mirzaev, Askar B. Abdikamalov, Ahmadjon A. Abdujabbarov, Dimitry Ayzenberg, Bobomurat Ahmedov, Cosimo Bambi
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 9, Pp 1-13 (2023)
Abstract The optical properties of rotating black holes in Kaluza–Klein theory described by the total mass, spin, and electric and magnetic charges are investigated in detail. Using a developed general relativistic ray-tracing code to calculate the
Externí odkaz:
https://doaj.org/article/59fcedfc3c94472b92a0aa7960ec20d8
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 8, Pp 1-9 (2022)
Abstract Bumblebee gravity is one of the simplest gravity theories with spontaneous Lorentz symmetry breaking. Since we know a rotating black hole solution in bumblebee gravity, we can potentially test this model with the available astrophysical obse
Externí odkaz:
https://doaj.org/article/020c6eb2056441faa2e86f56bb68eaf9
Autor:
Jiachen Zhu, Askar B. Abdikamalov, Dimitry Ayzenberg, Mustapha Azreg-Aïnou, Cosimo Bambi, Mubasher Jamil, Sourabh Nampalliwar, Ashutosh Tripathi, Menglei Zhou
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 7, Pp 1-9 (2020)
Abstract Kaluza–Klein theory is a popular alternative theory of gravity, with both non-rotating and rotating black hole solutions known. This allows for the possibility that the theory could be observationally tested. We present a model which calcu
Externí odkaz:
https://doaj.org/article/d7b77ea07f77466db75853a43f4774f5
Autor:
Biao Zhou, Ashutosh Tripathi, Askar B. Abdikamalov, Dimitry Ayzenberg, Cosimo Bambi, Sourabh Nampalliwar, Menglei Zhou
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 5, Pp 1-12 (2020)
Abstract We construct a relativistic reflection model in a non-Kerr spacetime in which, depending on the value of the deformation parameter of the metric, there are black hole solutions with spin parameter $$|a_*| > 1$$ |a∗|>1 . We apply our model
Externí odkaz:
https://doaj.org/article/26f5e73060e64dbc814ea5abb6809e5d
Publikováno v:
Proceedings, Vol 17, Iss 1, p 7 (2019)
In this paper, we briefly present relxill_nk, the first and currently only readily available model of the relativistic reflection spectrum of black hole accretion disks that includes non-Kerr solutions for the black hole spacetime, thus allowing for
Externí odkaz:
https://doaj.org/article/5a4ab6380ba647439b750b6683f37b4f
Autor:
Askar B. Abdikamalov, Dimitry Ayzenberg, Cosimo Bambi, Sourabh Nampalliwar, Ashutosh Tripathi, Jelen Wong, Yerong Xu, Jinli Yan, Yunfeng Yan, Yuchan Yang
Publikováno v:
Proceedings, Vol 17, Iss 1, p 2 (2019)
In this paper, we review our current efforts to test General Relativity in the strong field regime by studying the reflection spectrum of supermassive black holes. So far we have analyzed 11 sources with observations of NuSTAR, Suzaku, Swift, and XMM
Externí odkaz:
https://doaj.org/article/5f9459e8f08b490dacac7cb9d06e7aab
Autor:
Cosimo Bambi, Askar B. Abdikamalov, Dimitry Ayzenberg, Zheng Cao, Honghui Liu, Sourabh Nampalliwar, Ashutosh Tripathi, Jingyi Wang-Ji, Yerong Xu
Publikováno v:
Universe, Vol 4, Iss 7, p 79 (2018)
Einstein’s theory of general relativity was proposed over 100 years ago and has successfully passed a large number of observational tests in the weak field regime. However, the strong field regime is largely unexplored, and there are many modified
Externí odkaz:
https://doaj.org/article/f856820d5d014c5caec58285a59f4a0a
Autor:
Cosimo Bambi, Askar B. Abdikamalov, Menglei Zhou, Victoria Grinberg, Dimitry Ayzenberg, Ashutosh Tripathi
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 496:497-503
The analysis of the thermal spectrum of geometrically thin and optically thick accretion disks of black holes, the so-called continuum-fitting method, is one of the leading techniques for measuring black hole spins. Current models normally approximat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e60b12787e31d8e608ec2188f591fc61
https://doi.org/10.1093/mnras/staa1591
https://doi.org/10.1093/mnras/staa1591
Autor:
Dimitry Ayzenberg, Cosimo Bambi
Publikováno v:
Handbook of X-ray and Gamma-ray Astrophysics ISBN: 9789811645440
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d00ef20f2a0e5596f88880bc8411d6c
https://doi.org/10.1007/978-981-16-4544-0_131-1
https://doi.org/10.1007/978-981-16-4544-0_131-1
Autor:
Shafqat Riaz, Swarnim Shashank, Rittick Roy, Askar B. Abdikamalov, Dimitry Ayzenberg, Cosimo Bambi, Zuobin Zhang, Menglei Zhou
The presence of spacetime singularities in physically relevant solutions of the Einstein Equations is normally interpreted as a symptom of the breakdown of classical general relativity at very high densities/curvatures. However, despite significant e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0bf328abe8f27f68f79bb0c9a90411b7