We study global non-axisymmetric oscillation modes trapped near the inner boundary of an accretion disc. Observations indicate that some of the quasi-periodic oscillations (QPOs) observed in the luminosities of accreting compact objects (neutron stars, black holes and white dwarfs) are produced in the inner-most regions of accretion discs or boundary layers. Two simple models are considered in ...

ABSTRACT Many black holes detected by the Laser Interferometer Gravitational-wave Observatory (LIGO) and Virgo detectors are multiple times more massive than those in X-ray binaries. One possibility is that some binary (BBHs) merge within a few Schwarzschild radii of supermassive hole (SMBH), so gravitational waves (GWs) highly redshifted, causing mass inferred from GW signals to appear higher ...

Our aim is to study the evolution of the orbit of a star under the influence of interactions with an accretion disc in an AGN. The model considered consists of a low-mass compact object orbiting a supermassive black hole and colliding periodically with the accretion disc. Approximate calculations based mostly on Newtonian theory of gravity have been carried out by several authors to estimate th...

Although downloadable digital files have largely replaced physical media, the compact disc (CD) is still a popular medium for music distribution. The compact disc was the first digital medium designed for the consumer market and has become the most popular medium for commercial releases. It was envisioned as a replacement for the phonograph record, but with several important enhancements: not t...

The $^{12}$CO rotational lines in protoplanetary discs are good tracers of the total spatial extension gas component, and potentially planet-disc interactions. We present ALMA long baseline observations $^{12}$CO(2-1) line ten from Ophiuchus DIsc Survey Employing (ODISEA) project, aiming to set constraints on distribution these sources. position angle gaseous disc can be inferred for five sourc...

This study evaluates clinical application of the ComPact UniLock system for ventral stabilization of the cervical spine. Patient material included 13 consecutive cases, 12 dogs and one cat, with cervical spinal instabilities secondary to disc-associated wobbler syndrome (six dogs), traumatic, iatrogenic, and disc-associated cervical spinal instability of small dogs (four cases), cervical spinal...

Using a recent result of Lárusson and Poletsky regarding plurisubharmonic subextensions we prove a disc formula for the quasiplurisubharmonic global extremal function for domains in P. As a corollary we get a characterization of the projective hull for connected compact sets in P by the existence of analytic discs.