TURSUNOV, Arman, Michal ZAJACEK, Andreas ECKART, Martin KOLOŠ, Silke BRITZEN, Zdeněk STUCHLÍK, Bozena CZERNY and Vladimír KARAS. Effect of Electromagnetic Interaction on Galactic Center Flare Components. Astrophysical Journal. 2020, vol. 897, No 1, p. "99-1"-"99-22", 22 pp. ISSN 0004-637X. Available from: https://dx.doi.org/10.3847/1538-4357/ab980e.
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Basic information
Original name Effect of Electromagnetic Interaction on Galactic Center Flare Components
Authors TURSUNOV, Arman (860 Uzbekistan, belonging to the institution), Michal ZAJACEK, Andreas ECKART, Martin KOLOŠ (203 Czech Republic, belonging to the institution), Silke BRITZEN, Zdeněk STUCHLÍK (203 Czech Republic, belonging to the institution), Bozena CZERNY and Vladimír KARAS (203 Czech Republic).
Edition Astrophysical Journal, 2020, 0004-637X.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10308 Astronomy
Country of publisher United Kingdom of Great Britain and Northern Ireland
Confidentiality degree is not subject to a state or trade secret
WWW URL
RIV identification code RIV/47813059:19630/20:A0000019
Organization unit Institute of physics in Opava
Doi http://dx.doi.org/10.3847/1538-4357/ab980e
UT WoS 000549312000001
Keywords in English black hole physics; Galactic center; Galaxy accretion disks; Magnetic fields; Milky Way magnetic fields; Accretion
Tags EF16_027-0008521, FÚ, FÚ2020, GA19-03950S, RIV21
Tags International impact, Reviewed
Links EF16_027/0008521, research and development project. GA19-03950S, research and development project.
Changed by Changed by: Mgr. Pavlína Jalůvková, učo 25213. Changed: 31/3/2022 09:47.
Abstract
Recently, near-infrared GRAVITY@ESO observations at 2.2 mu m announced the detection of three bright "flares" in the vicinity of the Galactic center supermassive black hole (SMBH) that exhibited orbital motion at a distance of about 6-11 gravitational radii from an similar to 4 x 10(6)Mblack hole. There are indications of the presence of a large-scale, organized component of the magnetic field at the Galactic center. Electromagnetic effects on the flare dynamics were previously not taken into account despite the relativistic motion of a plasma in magnetic field leading to the charge separation and nonnegligible net charge density in the plasma. Applying various approaches, we find the net charge number density of the flare components of the order of 10(-3)-10(-4)cm(-3), while the particles' total number density is of the order of 10(6)-10(8)cm(-3). However, even such a tiny excess of charged particles in the quasi-neutral plasma can significantly affect the dynamics of flare components, which can then lead to the degeneracy in the measurements of spin of the SMBH. Analyzing the dynamics of recent flares in the case of the rapidly rotating black hole, we also constrain the inclination angle between the magnetic field and spin axis to alpha < 50 degrees, as for larger angles, the motion of the hot spot is strongly chaotic.
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