We present a magnetic bomb scenario for the multiwavelength behavior during " Type B " relativistic jet events in the microquasar GRS 1915+105. These events are characterized by a hard X-ray dip which terminates in a soft X-ray spike. The scenario, based on the suspended accretion model for long gamma-ray bursts, posits a magnetic dynamo around an accreting Kerr black hole which reaches the Van...

A newly formed black hole may be directly identified if late-time accretion of material from the base of the ejected envelope generates a luminosity that is observable in the tail of the supernova light curve. In this work we estimate the rate at which events where the black hole “emerges” in the supernova light curve can be detected with present capabilities. Our investigation is based on an a...

With the continuous upgrade of detectors, greater numbers gravitational wave (GW) events have been captured by LIGO Scientific Collaboration and Virgo (LVC), which offer a new avenue to test general relativity explore nature gravity. Although various model-independent tests performed LVC in previous works, it is still interesting ask what constraints can be placed on specific models current GW ...

Gravitational wave (GW) memory is an important prediction of general relativity. Existing works on the GW detection targeted nonoscillatory strain. It hard for strain analysis method to detect due its quasidirect current behavior and weakness. We implement a completely different scheme in this work estimate memory. In scheme, we first apply Bondi-Metzner-Sachs calculate binary black hole based ...

using piezoelectric patches the stress concentration around a hole on a plate under tension is reduced and controlled. to attain the reduction in stress two placements for piezoelectric patches is investigated. the first location is top/bottom of the hole with compression induced strain and the second is left/right of the hole with tension induced strains to control the stress flow. the result ...

because of production process and constrains conditions, circular graphene sheet may be opposed to structural defect and pin hole, respectively. some of the defects and pin hole on a circular graphene sheet can be considered as an eccentric hole on the sheet. hence, analyzing behavior of circular graphene sheet with an eccentric hole is important. free vibration of an eccentric annular graphene...

There are at least two formation scenarios consistent with the first gravitational-wave observations of binary black hole mergers. In field models, black hole binaries are formed from stellar binaries that may undergo common envelope evolution. In dynamic models, black hole binaries are formed through capture events in globular clusters. Both classes of models are subject to significant theoret...