Charged string loops in Reissner–Nordström black hole background

@article{30095,
   author = {Oteev, Tursinbay and Kološ, Martin and Stuchlík, Zdeněk},
   article_number = {3},
   doi = {http://dx.doi.org/10.1140/epjc/s10052-018-5735-y},
   keywords = {Reissner–Nordström black hole; charged string loop; quasi-periodic oscillations; microquasars},
   language = {eng},
   issn = {1434-6044},
   journal = {European Physical Journal C},
   title = {Charged string loops in Reissner–Nordström black hole background},
   url = {https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-018-5735-y},
   volume = {78},
   year = {2018}
}

TY  - JOUR
ID  - 30095
AU  - Oteev, Tursinbay - Kološ, Martin - Stuchlík, Zdeněk
PY  - 2018
TI  - Charged string loops in Reissner–Nordström black hole background
JF  - European Physical Journal C
VL  - 78
IS  - 3
SP  - "261-1"-"261-19"
EP  - "261-1"-"261-19"
SN  - 14346044
KW  - Reissner–Nordström black hole
KW  - charged string loop
KW  - quasi-periodic oscillations
KW  - microquasars
UR  - https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-018-5735-y
L2  - https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-018-5735-y
N2  - We study the motion of current carrying charged string loops in the Reissner–Nordström black hole background combining the gravitational and electromagnetic field. Introducing new electromagnetic interaction between central charge and charged string loop makes the string loop equations of motion to be non-integrable even in the flat spacetime limit, but it can be governed by an effective potential even in the black hole background. We classify different types of the string loop trajectories using effective potential approach, and we compare the innermost stable string loop positions with loci of the charged particle innermost stable orbits. We examine string loop small oscillations around minima of the string loop effective potential, and we plot radial profiles of the string loop oscillation frequencies for both the radial and vertical modes. We construct charged string loop quasi-periodic oscillations model and we compare it with observed data from microquasars GRO 1655-40, XTE 1550-564, and GRS 1915+105. We also study the acceleration of current carrying string loops along the vertical axis and the string loop ejection from RN black hole neighbourhood, taking also into account the electromagnetic interaction.
ER  - 

OTEEV, Tursinbay, Martin KOLOŠ and Zdeněk STUCHLÍK. Charged string loops in Reissner–Nordström black hole background. \textit{European Physical Journal C}. 2018, vol.~78, No~3, p.~''261-1''-''261-19'', 19 pp. ISSN~1434-6044. Available from: https://dx.doi.org/10.1140/epjc/s10052-018-5735-y.