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Wave-Mediated Boundary Layers of Accretion Discs: Role of Internal Structure of the Accretor
Samuel G. D. Turner, Roman R. Rafikov, Alexander A. Philippov
Disc accretion onto astrophysical objects with a material surface proceeds through the boundary layer (BL) -- a radially narrow region in the inner disc where the incoming gas must…
Anatomy of a slow merger: dissecting secularly-driven inspirals of LIGO/Virgo gravitational wave sources
Chris Hamilton, Roman R. Rafikov
The dozens of compact object mergers detected by LIGO/Virgo raise a key theoretical question: how do initially wide binaries shrink sufficiently quickly that they are able to merge…
Boundary Layers of Accretion Disks: Wave-Driven Transport and Disk Evolution
Matthew S. B. Coleman, Roman R. Rafikov, Alexander A. Philippov
Astrophysical objects possessing a material surface (white dwarfs, young stars, etc.) may accrete gas from the disc through the so-called surface boundary layer (BL), in which the…
Boundary Layers of Accretion Disks: Discovery of Vortex-Driven Modes and Other Waves
Matthew S. B. Coleman, Roman R. Rafikov, Alexander A. Philippov
Disk accretion onto weakly magnetized objects possessing a material surface must proceed via the so-called boundary layer (BL) - a region at the inner edge of the disk, in which th…
Multi-Messenger Astrophysics with Pulsar Timing Arrays
Luke Zoltan Kelley, Maria Charisi, Sarah Burke-Spolaor +29
Pulsar timing arrays (PTAs) are on the verge of detecting low-frequency gravitational waves (GWs) from supermassive black hole binaries (SMBHBs). With continued observations of a l…
Radial Transport and Meridional Circulation in Accretion Disks
Alexander A. Philippov, Roman R. Rafikov
Radial transport of particles, elements and fluid driven by internal stresses in three-dimensional (3D) astrophysical accretion disks is an important phenomenon, potentially releva…