J
2012
Observational phenomena related to primordial Kerr superspinars
SCHEE, Jan and Zdeněk STUCHLÍK
Basic information
Original name
Observational phenomena related to primordial Kerr superspinars
Edition
Classical and Quantum Gravity, GB - Spojené království Velké Británie a, 2012, 0264-9381
Other information
Type of outcome
Článek v odborném periodiku
Field of Study
10308 Astronomy
Confidentiality degree
není předmětem státního či obchodního tajemství
Organization unit
Faculty of Philosophy and Science in Opava
Keywords in English
Quasi-periodic oscillations; Black-hole spin; X-ray binaries; Relativistic accretion disks
Tags
International impact, Reviewed
Links
MSM4781305903, plan (intention).
V originále
String theory indicates the existence of primordial Kerr superspinars, extremely compact objects with exterior described by the Kerr naked-singularity geometry. The primordial superspinars have to be converted to a black hole due to accretion, but they could survive to the era of high-redshift quasars. We discuss observational phenomena caused by the primordial Kerr superspinars in this era, considering the properties of corotating Keplerian accretion discs orbiting such superspinars and the optical phenomena modified by their presence. The potential well around a near-extreme superspinar with spin a very close to the extreme black hole value a = 1 is very deep so that the efficiency of the accretion process reaches 157.7%, influencing thus significantly the spectral continuum of corotating Keplerian discs and giving a signature of near-extreme superspinars. Such superspinars can also serve as an efficient accelerator for extremely high-energy collisions. Phenomena enabling a clear dis
Displayed: 25/12/2024 07:05