On the nature of ultraluminous X-ray sources

S.N. Fabrika^a, K.E. Atapin^b, A.S. Vinokurov^a
^aSpecial Astrophysical Observatory, Russian Academy of Sciences, Nizhnii Arkhyz, Zelenchukskiy Region, Karachai-Cherkessian Republic, Russian Federation
^bLomonosov Moscow State University, Shternberg State Astronomical Institute, Universitetskii prosp. 13, Moscow, 119889, Russian Federation

Ultraluminous X-ray sources (ULXs) that are located in external galaxies exhibit X-ray luminosities exceeding hundreds or even thousands times those of the brightest black holes in Milky Way and Local Group galaxies. New classes of objects have been discovered: ultraluminous X-ray pulsars (ULXPs) and high-velocity outflows whose X-ray-range speed is up to 0.2 c. The ULXs and ULXPs fully correspond to concepts of the super-Eddington accretion. Five ULXs exhibit in the X-range power spectra quasi-periodical oscillations and a flat-topped noise. Optical spectra of the ULXs are very similar to those of SS433, late nitrogen stars (WNL/WR) or LBV stars (luminous blue variables). The results obtained suggest that the ULXs are the systems that contain supercritical accretion disks.

Keywords: ultraluminous X-ray sources, optical spectroscopy, X-ray data, quasi-periodical oscillations
PACS: 97.60.Gb, 97.80.Jp, 98.70.Qy (all)
DOI: 10.3367/UFNe.2019.04.038595
URL: https://ufn.ru/en/articles/2019/11/g/
Web of Science

000518757700007
Scopus

2-s2.0-85083328908
Citation: Fabrika S N, Atapin K E, Vinokurov A S "On the nature of ultraluminous X-ray sources" Phys. Usp. 62 1162–1169 (2019)

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Received: 18th, June 2019, accepted: 3rd, April 2019

Оригинал: Фабрика С Н, Атапин К Е, Винокуров А С «О природе ультраярких рентгеновских источников» УФН 189 1240–1248 (2019); DOI: 10.3367/UFNr.2019.04.038595

References (55) Cited by (1) Similar articles (20) ↓

M.R. Gilfanov “X-ray binaries and star formation” Phys. Usp. 56 714–722 (2013)
A.M. Cherepashchuk “Observing stellar mass and supermassive black holes” Phys. Usp. 59 702–712 (2016)
N.I. Shakura, D.A. Kolesnikov et al “Accretion processes in astrophysics” Phys. Usp. 62 1126–1135 (2019)
“Advances in astronomy (Scientific session of the Physical Sciences Division of the Russian Academy of Sciences, 27 February 2013)” Phys. Usp. 56 704–737 (2013)
I.D. Novikov, I.D. Karachentsev et al “Scientific session of the Division of General Physics and Astronomy of the Russian Academy of Sciences (28 February, 2001)” Phys. Usp. 44 817–818 (2001)
Ya.B. Zel’dovich “Neutron Stars and ’Black Holes’” Sov. Phys. Usp. 16 559–561 (1974)
D.G. Yakovlev “Superfluidity in neutron stars” Phys. Usp. 44 823–826 (2001)
D.V. Bisikalo, A.G. Zhilkin, E.P. Kurbatov “Possible electromagnetic manifestations of merging black holes” Phys. Usp. 62 1136–1152 (2019)
V.M. Lipunov “Astrophysical sense of the discovery of gravitational waves” Phys. Usp. 59 918–928 (2016)
V.A. Simonenko “Nuclear explosions as a probing tool for high-intensity processes and extreme states of matter: some applications of results” Phys. Usp. 49 861–871 (2006)
A.M. Cherepashchuk “Searches for black holes: the recent data” Phys. Usp. 44 821–823 (2001)
K.A. Postnov, A.G. Kuranov, N.A. Mitichkin “Spins of black holes in coalescing compact binaries” Phys. Usp. 62 1153–1161 (2019)
“Extending the event horizon: multimessenger astronomy (Scientific session of the Physical Sciences Division of the Russian Academy of Sciences, 3 April 2019)” Phys. Usp. 62 1125–1125 (2019)
D.A. Kirzhnits “Pulsars and rotation of a superfluid liquid” Phys. Usp. 38 791–792 (1995)
T.V. Shabanova “Discovery of a planetary system around PSR 0329+54” Phys. Usp. 37 618–621 (1994)
A.M. Cherepashchuk “Discovery of gravitational waves: a new chapter in black hole studies” Phys. Usp. 59 910–917 (2016)
I.M. Kopylov “Spectral observations of binary systems with relativistic companions using the six-meter telescope” Sov. Phys. Usp. 29 981–983 (1986)
L.M. Erukhimov “Oscillations of Pulsar Radio Emission” Sov. Phys. Usp. 12 806–807 (1970)
V.D. Kuznetsov, V.V. Zaitsev et al “Joint scientific session of the Physical Sciences Division of the Russian Academy of Sciences and the Joint Physical Society of the Russian Federation (30 November 2005)” Phys. Usp. 49 305–311 (2006)
A.D. Kuz’min “The pulsar time scale” Sov. Phys. Usp. 31 881–882 (1988)

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