Testing alternative theories of gravity by fitting the hot-spot
data of Sgr A*

J 2022

Testing alternative theories of gravity by fitting the hot-spot data of Sgr A*

SHAHZADI, Misbah, Martin KOLOŠ, Zdeněk STUCHLÍK and Yousaf HABIB

Basic information

Original name

Testing alternative theories of gravity by fitting the hot-spot data of Sgr A*

Authors

SHAHZADI, Misbah, Martin KOLOŠ (203 Czech Republic, belonging to the institution), Zdeněk STUCHLÍK (203 Czech Republic, belonging to the institution) and Yousaf HABIB

Edition

European Physical Journal C, New York (USA), SPRINGER, 2022, 1434-6044

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

RIV identification code

RIV/47813059:19630/22:A0000186

Organization unit

Institute of physics in Opava

DOI

http://dx.doi.org/10.1140/epjc/s10052-022-10347-4

UT WoS

000791400300002

Keywords in English

Sagittarius A* ;Sgr A*;Kerr black hole;nonlinear electrodynamics;general relativity;dark matter

Links

GA19-03950S, research and development project.

Změněno: 31/1/2023 12:07, Mgr. Pavlína Jalůvková

Abstract

V originále

We are fitting dynamics of electrically neutral hot-spot orbiting around Sagittarius A* (Sgr A*) source in Galactic center, represented by various modifications of the standard Kerr black hole (BH), to the three flares observed by the GRAVITY instrument on May 27, July 22, July 28, 2018. We consider stationary, axisymmetric, and asymptotically flat spacetimes describing charged BHs in general relativity (GR) combined with nonlinear electrodynamics, or reflecting the influence of dark matter (DM), or in so called parameterized dirty Kerr spacetimes, and test them using the hot-spot data. We show that the orbital frequencies as well as positions of the hot-spots orbiting the considered BHs fit the observed positions and periods of the flare orbits, and give relevant constraints on the parameters of the considered BH spacetimes and the gravity or other theories behind such modified spacetimes.

Citovat

SHAHZADI, Misbah, Martin KOLOŠ, Zdeněk STUCHLÍK and Yousaf HABIB. Testing alternative theories of gravity by fitting the hot-spot data of Sgr A*. European Physical Journal C. New York (USA): SPRINGER, 2022, vol. 82, No 5, p. "407-1"-"407-22", 22 pp. ISSN 1434-6044. Available from: https://dx.doi.org/10.1140/epjc/s10052-022-10347-4.

@article{65827,
   author = {Shahzadi, Misbah and Kološ, Martin and Stuchlík, Zdeněk and Habib, Yousaf},
   article_location = {New York (USA)},
   article_number = {5},
   doi = {http://dx.doi.org/10.1140/epjc/s10052-022-10347-4},
   keywords = {Sagittarius A* ;Sgr A*;Kerr black hole;nonlinear electrodynamics;general relativity;dark matter},
   language = {eng},
   issn = {1434-6044},
   journal = {European Physical Journal C},
   title = {Testing alternative theories of gravity by fitting the hot-spot data of Sgr A*},
   url = {https://link.springer.com/article/10.1140/epjc/s10052-022-10347-4},
   volume = {82},
   year = {2022}
}

TY  - JOUR
ID  - 65827
AU  - Shahzadi, Misbah - Kološ, Martin - Stuchlík, Zdeněk - Habib, Yousaf
PY  - 2022
TI  - Testing alternative theories of gravity by fitting the hot-spot data of Sgr A*
JF  - European Physical Journal C
VL  - 82
IS  - 5
SP  - "407-1"-"407-22"
EP  - "407-1"-"407-22"
PB  - SPRINGER
SN  - 14346044
KW  - Sagittarius A* ;Sgr A*;Kerr black hole;nonlinear electrodynamics;general relativity;dark matter
UR  - https://link.springer.com/article/10.1140/epjc/s10052-022-10347-4
N2  - We are fitting dynamics of electrically neutral hot-spot orbiting around Sagittarius A* (Sgr A*) source in Galactic center, represented by various modifications of the standard Kerr black hole (BH), to the three flares observed by the GRAVITY instrument on May 27, July 22, July 28, 2018. We consider stationary, axisymmetric, and asymptotically flat spacetimes describing charged BHs in general relativity (GR) combined with nonlinear electrodynamics, or reflecting the influence of dark matter (DM), or in so called parameterized dirty Kerr spacetimes, and test them using the hot-spot data. We show that the orbital frequencies as well as positions of the hot-spots orbiting the considered BHs fit the observed positions and periods of the flare orbits, and give relevant constraints on the parameters of the considered BH spacetimes and the gravity or other theories behind such modified spacetimes.
ER  -

SHAHZADI, Misbah, Martin KOLOŠ, Zdeněk STUCHLÍK and Yousaf HABIB. Testing alternative theories of gravity by fitting the hot-spot data of Sgr A*. \textit{European Physical Journal C}. New York (USA): SPRINGER, 2022, vol.~82, No~5, p.~''407-1''-''407-22'', 22 pp. ISSN~1434-6044. Available from: https://dx.doi.org/10.1140/epjc/s10052-022-10347-4.

Detailed Information on Publication Record