Misalignment of the microquasar V4641 Sgr (SAX J1819.3–2525)

  title={Misalignment of the microquasar V4641 Sgr (SAX J1819.3–2525)},
  author={Rebecca G. Martin and Rubens C. Reis and J. E. Pringle},
  journal={Monthly Notices of the Royal Astronomical Society: Letters},
In the microquasar V4641 Sgr, the spin of the black hole is thought to be misaligned with the binary orbital axis. The accretion disc aligns with the black hole spin by the Lense-Thirring effect near to the black hole and further out becomes aligned with the binary orbital axis. The inclination of the radio jets and the Fe Kα line profile have both been used to determine the inclination of the inner accretion disc but the measurements are inconsistent. Using a steady-state analytical-warped… Expand

Figures from this paper

We present the first results from a long (51 ks) XMM-Newton observation of the Galactic X-ray binary SWIFT J1910.2-0546 in an intermediate state, obtained during its 2012 outburst. A clear,Expand
V4641 Sgr: a candidate precessing microblazar
The X-ray spectrum of the Galactic X-ray binary V4641 Sgr in outburst has been found to exhibit a remarkably broad emission feature above 4 keV, with inferred equivalent widths up to 2 keV. Such aExpand
A Study of a Tilted Thin Inner Accretion Disk around a Spinning Black Hole
The inner part of a thin accretion disk around a Kerr black hole can serve as an important tool to study the physics of the strong gravity regime. A tilt in such a disk with respect to the black holeExpand
Global Simulations of the Interaction of Microquasar Jets with a Stellar Wind in High-mass X-ray Binaries
Jets powered by high-mass X-ray binaries must traverse the powerful wind of the companion star. We present the first global three-dimensional simulations of jet–wind interaction in high-mass X-rayExpand
The Kozai-Lidov Mechanism in Hydrodynamical Disks
We use three-dimensional hydrodynamical simulations to show that a highly misaligned accretion disk around one component of a binary system can exhibit global Kozai-Lidov cycles, where theExpand
Distinguishing spin-aligned and isotropic black hole populations with gravitational waves
The best-measured combination of spin parameters for each of the four likely binary black hole detections GW150914, LVT151012, GW151226 and GW170104 is the ‘effective’ spin, indicating that the effective spins for these systems indicate a 0.015 odds ratio against an aligned angular distribution compared to an isotropic one. Expand
Potential kick velocity distribution of black hole X-ray binaries and implications for natal kicks
We use very long baseline interferometry to measure the proper motions of three black hole X-ray binaries (BHXBs). Using these results together with data from the literature and Gaia DR2 to collateExpand
Insights into binary black hole formation from gravtitational waves
Gravitational-waves provide a unique probe of the stellar remnants---black holes and neutron stars---left behind at the end of massive stars lives. On the 14th September 2015 the Advanced LaserExpand
Origin of spin–orbit misalignments: the microblazar V4641 Sgr
Of the known microquasars, V4641 Sgr boasts the most severe lower limit (> 52°) on the misalignment angle between the relativistic jet axis and the binary orbital angular momentum. Assuming the jetExpand


Alignment time-scale of the microquasar GRO J1655−40
The microquasar GRO J1655−40 has a black hole with spin angular momentum apparently misaligned to the orbital plane of its companion star. We analytically model the system with a steady-state discExpand
On the misalignment of jets in microquasars
We discuss the time-scales for alignment of black hole and accretion disc spins in the context of binary systems. We show that for black holes that are formed with substantial angular momentum, theExpand
Jet-induced Nucleosynthesis in Misaligned Microquasars
The jet axes and the orbital planes of microquasar systems are usually assumed to be approximately perpendicular, even though this is not currently an observational requirement. On the contrary, inExpand
Alignment and precession of a black hole with a warped accretion disc
We consider the shape of an accretion disc whose outer regions are misaligned with the spin axis of a central black hole and calculate the steady state form of the warped disc in the case where theExpand
Warped accretion discs and the long periods in X-ray binaries
It is shown that an instability of the response of the disc to the radiation reaction force from the illumination by the central source can cause it to tilt out of the orbital plane and precess in something like the required manner. Expand
Broad Iron-Kα Emission Lines as a Diagnostic of Black Hole Spin
We address the ability of broad iron emission lines from black hole accretion disks to diagnose the spin of the black hole. Using a high-resolution three-dimensional MHD simulation of a geometricallyExpand
Optical and Infrared Photometry of the Microquasar GRO J1655-40 in Quiescence
We present BVIJK photometry of the black hole candidate GRO J1655-40 in full quiescence. We report a refined orbital period of 2.62191 ± 0.00020 days. The light curves are dominated by ellipsoidalExpand
A Black Hole in the Superluminal Source SAX J1819.3-2525 (V4641 Sgr)
The B-star secondary is by far the most massive, the hottest, and the most luminous secondary of the dynamically confirmed black hole X-ray transients and V4641 Sgr contains a black hole. Expand
The warped disc of NGC 4258
We consider the properties of the warped accretion disc in NGC 4258 which is delineated by maser emission. We use our analytical models to consider whether the disc could be warped by Lense-ThirringExpand
Super-Eddington outburst of V4641 Sgr
X-ray transients provide unique opportunity to probe accretion regimes of at a vastly dierent accretion rates. We analyze a collection of the RXTE observations (Galactic Center scans, ASM monitoringExpand