scholarly journals The Accretion Disk Limit Cycle Mechanism in the Black Hole X‐Ray Binaries: Toward an Understanding of the Systematic Effects

1998 ◽  
Vol 494 (1) ◽  
pp. 366-380 ◽  
Author(s):  
John K. Cannizzo
Keyword(s):  
Black Hole ◽  
Limit Cycle ◽  
Accretion Disk ◽  
X Ray ◽  
Systematic Effects ◽  
X Ray Binaries

scholarly journals The Accretion Disk Limit Cycle Instability in Black Hole X-Ray Binaries

1995 ◽  
Vol 454 ◽  
pp. 880 ◽  
Author(s):  
John K. Cannizzo ◽  
Wan Chen ◽  
Mario Livio
Keyword(s):  
Black Hole ◽  
Limit Cycle ◽  
Accretion Disk ◽  
X Ray ◽  
X Ray Binaries

scholarly journals Accretion Disk Oscillations and QPOs in Black Hole X-ray Binaries

2003 ◽  
Vol 214 ◽  
pp. 227-230
Author(s):  
Xue-Bing Wu
Keyword(s):  
Black Hole ◽  
Accretion Disk ◽  
X Ray ◽  
Viscosity Parameter ◽  
Viscosity Effects ◽  
Local Perturbations ◽  
Characteristic Oscillation ◽  
Oscillation Modes ◽  
Low Mass ◽  
X Ray Binaries

The observed quasi-periodic oscillations (QPOs) in low-mass X-ray binaries have been suggested to be probably related to the characteristic oscillation modes in the inner part of a relativistic accretion disk. Here we study the non-damping oscillation modes in the disk by considering the local perturbations and viscosity effects. We find that the trapped oscillations are amplified significantly when the viscosity parameter increases and the trapped size varies when the radial wavenumber and Mach number change. Our results support that the hundred-hertz QPOs and their low fractional rms amplitudes found in some black hole X-ray binaries may be explained by the trapped non-damping oscillation modes in the inner part of an accretion disk around a rapidly rotating black hole.

scholarly journals Testing Accretion Disk Theory in Black Hole X‐Ray Binaries

2006 ◽  
Vol 647 (1) ◽  
pp. 525-538 ◽  
Author(s):  
Shane W. Davis ◽  
Chris Done ◽  
Omer M. Blaes
Keyword(s):  
Black Hole ◽  
Accretion Disk ◽  
X Ray ◽  
X Ray Binaries

scholarly journals Outburst of the unique X-ray transient CI Cam and its impact on the system

2006 ◽  
Vol 2 (S238) ◽  
pp. 447-448
Author(s):  
V. Šimon ◽  
C. Bartolini ◽  
A. Guarnieri ◽  
A. Piccioni ◽  
D. Hanžl
Keyword(s):  
Black Hole ◽  
Accretion Disk ◽  
Thermal Instability ◽  
X Ray ◽  
Disk Mass ◽  
Spectral Components ◽  
Low Mass ◽  
X Ray Binaries

AbstractWe argue that the outburst of CI Cam (XTE J0421+560), probably containing a black hole, was caused by the thermal instability of the accretion disk. Applying the model of King & Ritter (1998), we obtain a realistic disk mass and radius. The differences from soft X-ray transients belonging to the low-mass X-ray binaries can be explained if the disk in CI Cam heats up an extended envelope and/or a strong jet is formed. We resolve several spectral components in the optical colors in quiescence after the outburst; they vary in a complicated way during a possible 1350 d cycle.We find indications that the variations of the source of the optical light can be related to those of the X-ray source in quiescence. The accretion disk seems to refill at present. Nowadays, only non-periodic intra-night optical (∼0.02 mag) fluctuations are present. As regards the absence of coherent changes in the optical band, we point out the similarities in the situation of CI Cam and the microquasar LS5039/RX J1826–1450.

Iron K-Line Emission from X-Ray Binaries

1988 ◽  
Vol 102 ◽  
pp. 47-50
Author(s):  
K. Masai ◽  
S. Hayakawa ◽  
F. Nagase
Keyword(s):  
Accretion Disk ◽  
Radiative Recombination ◽  
Characteristic Temperature ◽  
Line Emission ◽  
Ionization Front ◽  
Continuum Radiation ◽  
X Ray ◽  
Low Mass ◽  
X Ray Binaries

AbstractEmission mechanisms of the iron Kα-lines in X-ray binaries are discussed in relation with the characteristic temperature Txof continuum radiation thereof. The 6.7 keV line is ascribed to radiative recombination followed by cascades in a corona of ∼ 100 eV formed above the accretion disk. This mechanism is attained for Tx≲ 10 keV as observed for low mass X-ray binaries. The 6.4 keV line observed for binary X-ray pulsars with Tx> 10 keV is likely due to fluorescence outside the He II ionization front.

scholarly journals X-Ray Determination of the Black-Hole Mass in Cygnus X-1

1998 ◽  
Vol 188 ◽  
pp. 388-389
Author(s):  
A. Kubota ◽  
K. Makishima ◽  
T. Dotani ◽  
H. Inoue ◽  
K. Mitsuda ◽  
...  
Keyword(s):  
Black Hole ◽  
Compact Object ◽  
Optical Observations ◽  
Black Hole Mass ◽  
X Ray ◽  
Upper Limit ◽  
Supergiant Star ◽  
X Ray Binaries ◽  
Two Bodies

About 10 X-ray binaries in our Galaxy and LMC/SMC are considered to contain black hole candidates (BHCs). Among these objects, Cyg X-1 was identified as the first BHC, and it has led BHCs for more than 25 years(Oda 1977, Liang and Nolan 1984). It is a binary system composed of normal blue supergiant star and the X-ray emitting compact object. The orbital kinematics derived from optical observations indicates that the compact object is heavier than ~ 4.8 M⊙ (Herrero 1995), which well exceeds the upper limit mass for a neutron star(Kalogora 1996), where we assume the system consists of only two bodies. This has been the basis for BHC of Cyg X-1.

scholarly journals A minimal timescale for the continuum in 4U 1608-52 and Aql X-1

2021 ◽  
Vol 502 (1) ◽  
pp. L72-L78
Author(s):  
K Mohamed ◽  
E Sonbas ◽  
K S Dhuga ◽  
E Göğüş ◽  
A Tuncer ◽  
...  
Keyword(s):  
Black Hole ◽  
Neutron Star ◽  
Power Spectra ◽  
Light Curves ◽  
State Transitions ◽  
Strong Positive Correlation ◽  
Present Evidence ◽  
X Ray ◽  
X Ray Binaries ◽  
The Continuum

ABSTRACT Similar to black hole X-ray binary transients, hysteresis-like state transitions are also seen in some neutron-star X-ray binaries. Using a method based on wavelets and light curves constructed from archival Rossi X-ray Timing Explorer observations, we extract a minimal timescale over the complete range of transitions for 4U 1608-52 during the 2002 and 2007 outbursts and the 1999 and 2000 outbursts for Aql X-1. We present evidence for a strong positive correlation between this minimal timescale and a similar timescale extracted from the corresponding power spectra of these sources.

Sign in / Sign up

Export Citation Format

Share Document