149 citations · 441 across the 11 of their papers we have counts for
9 papers · 1 filter
An Electron-Scattering Time Delay in Black Hole Accretion Disks
Greg Salvesen
Universal to black hole X-ray binaries, the high-frequency soft lag gets longer during the hard-to-intermediate state transition, evolving from to ${\sim}10~…
Black Hole Spin in X-ray Binaries: Giving Uncertainties an
Greg Salvesen, Jonah M. Miller
The two established techniques for measuring black hole spin in X-ray binaries often yield conflicting results, which must be resolved before either method may be deemed robust. In…
Origin of Spin-Orbit Misalignments: The Microblazar V4641 Sgr
Greg Salvesen, Supavit Pokawanvit
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.…
Convective Quenching of Field Reversals in Accretion Disc Dynamos
Matthew S. B. Coleman, Evan Yerger, Omer Blaes +2
Vertically stratified shearing box simulations of magnetorotational turbulence commonly exhibit a so-called butterfly diagram of quasi-periodic azimuthal field reversals. However,…
Strongly magnetized accretion discs require poloidal flux
Greg Salvesen, Philip J. Armitage, Jacob B. Simon +1
Motivated by indirect observational evidence for strongly magnetized accretion discs around black holes, and the novel theoretical properties of such solutions, we investigate how…
Accretion disc dynamo activity in local simulations spanning weak-to-strong net vertical magnetic flux regimes
Greg Salvesen, Jacob B. Simon, Philip J. Armitage +1
Strongly magnetized accretion discs around black holes have attractive features that may explain enigmatic aspects of X-ray binary behaviour. The structure and evolution of these d…
A physical model for state transitions in black hole X-ray binaries
Chris Nixon, Greg Salvesen
We present an accretion cycle which can explain state transitions and other observed phenomena in black hole X-ray binaries. This model is based on the process of disc tearing, whe…
Spectral hardening as a viable alternative to disc truncation in black hole state transitions
Greg Salvesen, Jon M. Miller, Rubens C. Reis +1
Constraining the accretion flow geometry of black hole binaries in outburst is complicated by the inability of simplified multi-colour disc models to distinguish between changes in…
Quantifying energetics and dissipation in magnetohydrodynamic turbulence
Greg Salvesen, Kris Beckwith, Jacob B. Simon +2
We perform a suite of two- and three-dimensional magnetohydrodynamic (MHD) simulations with the Athena code of the non-driven Kelvin-Helmholtz instability in the subsonic, weak mag…