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UFN, 2015, Volume 185, Number 8, Pages 829–843 (Mi ufn5323)  

This article is cited in 13 scientific papers (total in 13 papers)

PHYSICS OF OUR DAYS

Physical laboratory at the center of the Galaxy

V. I. Dokuchaevab, Yu. N. Eroshenkob

a National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow
b Institute for Nuclear Research, Russian Academy of Sciences, Moscow

Abstract: We review the physical processes that occur at the center of the Galaxy and that are related to the supermassive black hole SgrA* residing there. The discovery of high-velocity S0 stars orbiting SgrA* for the first time allowed measuring the mass of this supermassive black hole, the closest one to us, with a $10%$ accuracy, with the result $M_h=(4.1\pm0.4)\times10^6M_\odot$. Further monitoring can potentially discover the Newtonian precession of the S0 star orbits in the gravitational field of the black hole due to invisible distributed matter. This will yield the ‘weight’ of the elusive dark matter concentrated there and provide new information for the identification of dark matter particles. The weak accretion activity of the ‘dormant quasar’ at the galactic center occasionally shows up as quasiperiodic X-ray and near-IR oscillations with mean periods of 11 and 19 min. These oscillations can possibly be interpreted as related to the rotation frequency of the SgrA* event horizon and to the latitude oscillations of hot plasma spots in the accretion disk. Both these frequencies depend only on the black hole gravitational field and not on the accretion model. Using this interpretation yields quite accurate values for both the mass $M_h$ and the spin $a$ (Kerr rotation parameter) of SgrA*: $M_h= (4.2\pm0.2) \times10^6M_\odot$ and $a=0.65\pm0.05$.

Funding Agency Grant Number
Russian Academy of Sciences - Federal Agency for Scientific Organizations ОФН-17
Russian Foundation for Basic Research 13-02-00257
Ministry of Education and Science of the Russian Federation НШ 3110.2014.2
The work was supported by the Program of the Division of Physical Sciences of RAS OFN-17 and the RFBR grants 13-02-00257 and NSh 3110.2014.2.

Author to whom correspondence should be addressed

DOI: https://doi.org/10.3367/UFNr.0185.201508c.0829

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English version:
Physics–Uspekhi, 2015, 58:8, 772–784

Bibliographic databases:

PACS: 95.35.+d, 97.60.Lf, 98.35.Gi, 98.35.Jk
MSC: 85A15, 83C57
Received: May 30, 2015
Accepted: June 9, 2015

Citation: V. I. Dokuchaev, Yu. N. Eroshenko, “Physical laboratory at the center of the Galaxy”, UFN, 185:8 (2015), 829–843; Phys. Usp., 58:8 (2015), 772–784

Citation in format AMSBIB
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    Citing articles on Google Scholar: Russian citations, English citations
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    This publication is cited in the following articles:
    1. Johannsen T., “Testing the no-hair theorem with observations of black holes in the electromagnetic spectrum”, Class. Quantum Gravity, 33:12 (2016), 124001  crossref  isi  elib  scopus
    2. De Paolis F., Giordano M., Ingrosso G., Manni L., Nucita A., Strafella F., “The Scales of Gravitational Lensing”, Universe, 2:1 (2016), UNSP 6  crossref  mathscinet  isi
    3. Dokuchaev V.I., Eroshenko Yu.N., “Dark matter distribution and annihilation at the Galactic center”, International Conference on Particle Physics and Astrophysics (ICPPA-2015), Pts 1-4, Journal of Physics Conference Series, 675, IOP Publishing Ltd, 2016, 012004  crossref  isi  scopus
    4. V. I. Dokuchaev, N. O. Nazarova, “Gravitational lensing of a star by a rotating black hole”, JETP Letters, 106:10 (2017), 637–642  mathnet  crossref  crossref  isi  elib
    5. A. F. Zakharov, P. Jovanovic, D. Borka, V. B. Jovanovic, “Graviton Mass Evaluation With Trajectories of Bright Stars At the Galactic Center”, International Conference on Particle Physics and Astrophysics, Journal of Physics Conference Series, 798, eds. A. Galper, A. Petrukhin, A. Taranenko, I. Selyuzhenkov, M. Skorokhvatov, S. Rubin, V. Dmitrenko, Gur, IOP Publishing Ltd, 2017, UNSP 012081  crossref  isi  scopus
    6. A. Zakharov, P. Jovanovic, D. Borka, V. B. Jovanovic, “Graviton Mass Bounds From An Analysis of Bright Star Trajectories At the Galactic Center”, Xxiii International Baldin Seminar on High Energy Physics Problems Relativistic Nuclear Physics and Quantum Chromodynamics (Baldin Ishepp Xxiii), EPJ Web Conf., 138, eds. S. Bondarenko, V. Burov, A. Malakhov, EDP Sciences, 2017, UNSP 01010  crossref  isi  scopus
    7. V. Dokuchaev, N. Nazarova, “Star Motion Around Rotating Black Hole in the Galactic Center in Real Time”, 3Rd International Conference on Particle Physics and Astrophysics (Icppa 2017), Journal of Physics Conference Series, 934, IOP Publishing Ltd, 2017, UNSP 012044  crossref  isi
    8. A. Zakharov, “The Black Hole At the Galactic Center: Observations and Models in a Nutshell”, 3Rd International Conference on Particle Physics and Astrophysics (Icppa 2017), Journal of Physics Conference Series, 934, IOP Publishing Ltd, 2017, UNSP 012037  crossref  isi
    9. A. F. Zakharov, “The black hole at the galactic center: observations and models”, Int. J. Mod. Phys. D, 27:6, SI (2018), 1841009  crossref  isi
    10. A. F. Zakharov, P. Jovanovic, D. Borka, V. B. Jovanovic, “Constraining the range of Yukawa gravity interaction from S2 star orbits III: improvement expectations for graviton mass bounds”, J. Cosmol. Astropart. Phys., 2018, no. 4, 050  crossref  isi
    11. A. F. Zakharov, “Constraints on tidal charge of the supermassive black hole at the galactic center with trajectories of bright stars”, Eur. Phys. J. C, 78:8 (2018), 689  crossref  isi  scopus
    12. Dokuchaev V.I., Nazarova N.O., Smirnov V.P., “Event Horizon Silhouette: Implications to Supermassive Black Holes in the Galaxies M87 and Milky Way”, Gen. Relativ. Gravit., 51:6 (2019), 81  crossref  isi
    13. Dokuchaev V.I. Nazarova N.O., “Event Horizon Image Within Black Hole Shadow”, J. Exp. Theor. Phys., 128:4 (2019), 578–585  crossref  isi
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