Improved Parameters for the Black Hole Binary System X-Ray Nova MUSCAE 1991

1996 ◽  
Vol 468 ◽  
pp. 380 ◽  
Author(s):  
Jerome A. Orosz ◽  
Charles D. Bailyn ◽  
Jeffrey E. McClintock ◽  
Ronald A. Remillard
Keyword(s):  
Black Hole ◽  
Binary System ◽  
X Ray ◽  
Black Hole Binary

scholarly journals The X-Ray Outburst of PG 1553+113: A Precession Effect of Two Jets in the Supermassive Black Hole Binary System

2021 ◽  
Vol 922 (2) ◽  
pp. 222
Author(s):  
Shifeng Huang ◽  
Hongxing Yin ◽  
Shaoming Hu ◽  
Xu Chen ◽  
Yunguo Jiang ◽  
...  
Keyword(s):  
Black Hole ◽  
Binary System ◽  
Light Curve ◽  
Quiescent State ◽  
Black Hole Mass ◽  
X Ray ◽  
Supermassive Black Hole ◽  
System A ◽  
Black Hole Binary ◽  
Two Jets

Abstract Blazar PG 1553+113 is thought to be a host of supermassive black hole binary system. A 2.2 yr quasi-periodicity in the γ-ray light curve was detected, possibly a result of jet precession. Motivated by the previous studies based on the γ-ray data, we analyzed the X-ray light curve and spectra observed during 2012–2020. The 2.2 yr quasi-periodicity might be consistent with the main-flare recurrence in the X-ray light curve. When a weak rebrightening in the γ-ray was observed, a corresponding relatively strong brightening in the X-ray light curve can be identified. The harder-when-brighter tendency in both X-ray main and weak flares was shown, as well as a weak softer-when-brighter behavior for the quiescent state. We explore the possibility that the variability in the X-ray band can be interpreted with two-jet precession scenario. Using the relation between jets and accretion disks, we derive the primary black hole mass ≃3.47 × 108 M ☉ and mass of the secondary one ≃1.40 × 108 M ☉, and their mass ratio ∼0.41.

VLBI OBSERVATIONS OF THE SHORTEST ORBITAL PERIOD BLACK HOLE X-RAY BINARY

2012 ◽  
Vol 08 ◽  
pp. 380-383
Author(s):  
ZSOLT PARAGI ◽  
TOMASO M. BELLONI ◽  
ALEXANDER J. VAN DER HORST ◽  
JAMES MILLER-JONES
Keyword(s):  
Black Hole ◽  
Binary System ◽  
Orbital Period ◽  
X Ray ◽  
Show Evidence ◽  
Multi Wavelength ◽  
Black Hole Binary ◽  
Wavelength Monitoring ◽  
Early Phases ◽  
Extended Emission

The X-ray transient MAXI J1659-152 was discovered by Swift/BAT and it was initially identified as a GRB. Soon its Galactic origin and binary nature were established. There exists a wealth of multi-wavelength monitoring data for this source, providing a great coverage of the full X-ray transition in this candidate black hole binary system. We obtained two epochs of EVN/e-VLBI and four epochs of VLBA data of MAXI J1659-152 which show evidence for some extended emission in the early phases but –against expectations– no major collimated ejecta during the accretion disk state transition. This might be related to the fact that, with a red dwarf donor star, MAXI J1659-152 is the shortest orbital period black hole X-ray binary system.

scholarly journals Probing Supercritical Accretion in Ultraluminous X-ray Source M82 X-1 by means of X-ray Spectral Evolution Analysis

2020 ◽  
Vol 240 ◽  
pp. 07005
Author(s):  
Izatul Hafizah ◽  
Kiki Vierdayanti
Keyword(s):  
Black Hole ◽  
Binary System ◽  
Accretion Rate ◽  
Spectral Evolution ◽  
X Ray ◽  
Mass Accretion Rate ◽  
Blackbody Model ◽  
Chi Squared ◽  
Dominant State ◽  
Black Hole Binary

We analyze the spectral evolution of ultraluminous X-ray source (ULX) M82 X-1 by means of spectral fitting. We use selected Swift/XRT data in 2014 and 2015. The flux of M82 X-1 increased by a factor of 2-3 from 2014 to 2015. Most of the data in 2015 show greater dominance of hard component than those of 2014. Due to moderate signal-to-noise ratio, we only fit each spectrum with power-law and disk blackbody model separately. The data in 2014 are better fitted with powerlaw model based on the value of reduced-chi squared. On the other hand, both powerlaw and diskbb models showed comparable re- duced chi-squared value for the data in 2015. We found that the range of spectral index for 2014 data is 1.65 < Γ < 2.08 and for 2015 data is 1.02 < Γ < 1.95 from the powerlaw model, resembling the range for that of black hole binary system at low mass accretion rate. We obtained higher innermost disk temper- ature from the disk blackbody model, 1.20 keV < Tin < 3.63 keV, compared to that of black hole binary system in the thermal state. The calculated innermost radius of the disk, Rin, varies between 0.99 to 4.89 RS assuming 10 M0 black hole which indicates that the spectral state is not in thermal dominant state but rather we suspect that M82 X-1 exhibits greater mass accretion rate than that of the thermal dominant state.

X-ray observations of the black hole binary V404 Cygni in quiescence

1994 ◽  
Author(s):  
R. M. Wagner ◽  
S. G. Starrfield ◽  
T. J. Kreidl ◽  
S. B. Howell ◽  
R. M. Hjellming
Keyword(s):  
Black Hole ◽  
X Ray ◽  
Black Hole Binary

Unusual Black Hole Binary LMC X-3: A Transient High-mass X-Ray Binary That Is Almost Always On?

2017 ◽  
Vol 849 (1) ◽  
pp. 32 ◽  
Author(s):  
Trevor J. Torpin ◽  
Patricia T. Boyd ◽  
Alan P. Smale ◽  
Lynne A. Valencic
Keyword(s):  
Black Hole ◽  
High Mass ◽  
X Ray ◽  
Black Hole Binary

High lithium abundance in the secondary of the black-hole binary system V404 Cygni

Nature ◽  
1992 ◽  
Vol 358 (6382) ◽  
pp. 129-131 ◽  
Author(s):  
E. L. Martín ◽  
R. Rebolo ◽  
J. Casares ◽  
P. A. Charles
Keyword(s):  
Black Hole ◽  
Binary System ◽  
Lithium Abundance ◽  
Black Hole Binary

scholarly journals Chemical Abundances of the Secondary Stars in the Black Hole Binary A0620-00 and the Neutron Star Binary Cen X-4

2004 ◽  
Vol 194 ◽  
pp. 204-204
Author(s):  
J. I. González-Hernández ◽  
R. Rebolo ◽  
G. Israelian ◽  
J. Casares
Keyword(s):  
Black Hole ◽  
Neutron Star ◽  
High Resolution ◽  
Compact Object ◽  
Accretion Disc ◽  
Accretion Discs ◽  
Chemical Abundances ◽  
X Ray ◽  
Black Hole Binary ◽  
Star Binary

We have determined abundances in the secondary stars of the black hole X-ray binary A0620-00 and the neutron star Binary Cen X-4. These are K type stars veiled by the emission produced by the respective accretion discs. We searched for evidence of nucleosynthetic products from the progenitor of the compact object that could have contaminated the secondary stars (as in Israelian et al., 1999).Using high resolution spectra obtained with VLT/UVES, we have derived in a consistent way stellar parameters and the veiling caused by the accretion disc.

scholarly journals X-ray flares from the stellar tidal disruption by a candidate supermassive black hole binary

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Xinwen Shu ◽  
Wenjie Zhang ◽  
Shuo Li ◽  
Ning Jiang ◽  
Liming Dou ◽  
...  
Keyword(s):  
Black Hole ◽  
X Rays ◽  
Tidal Disruption ◽  
Massive Black Hole ◽  
Ultraviolet Emission ◽  
X Ray ◽  
Black Hole Binaries ◽  
Supermassive Black Hole ◽  
Black Hole Binary

AbstractOptical transient surveys have led to the discovery of dozens of stellar tidal disruption events (TDEs) by massive black hole in the centers of galaxies. Despite extensive searches, X-ray follow-up observations have produced no or only weak X-ray detections in most of them. Here we report the discovery of delayed X-ray brightening around 140 days after the optical outburst in the TDE OGLE16aaa, followed by several flux dips during the decay phase. These properties are unusual for standard TDEs and could be explained by the presence of supermassive black hole binary or patchy obscuration. In either scenario, the X-rays can be produced promptly after the disruption but are blocked in the early phase, possibly by a radiation-dominated ejecta which leads to the bulk of optical and ultraviolet emission. Our findings imply that the reprocessing is important in the TDE early evolution, and X-ray observations are promising in revealing supermassive black hole binaries.

scholarly journals Accretion geometry of the black-hole binary Cygnus X-1 from X-ray polarimetry

2018 ◽  
Vol 2 (8) ◽  
pp. 652-655 ◽  
Author(s):  
M. Chauvin ◽  
H.-G. Florén ◽  
M. Friis ◽  
M. Jackson ◽  
T. Kamae ◽  
...  
Keyword(s):  
Black Hole ◽  
X Ray ◽  
Black Hole Binary
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