It may soon be possible for Advanced LIGO to detect hundreds of binary black hole mergers per year. We show how the accumulation of many such measurements will allow for the detection of gravitational-wave memory: a permanent displacement of spacetime that comes from strong-field, general relativistic effects. We estimate that Advanced LIGO operating at design sensitivity may be able to make a ...

In lead halide perovskite solar cells, there is at least one recycling event of electron-hole pair to photon to electron-hole pair at open circuit under solar illumination. This can lead to a significant reduction in the external photoluminescence yield from the internal yield. Here we show that, for an internal yield of 70%, we measure external yields as low as 15% in planar films, where light...

The present paper applies a refined detection pipeline to publicly available LIGO-Virgo data from the first half of third observing run (O3a) identify new binary black hole (BBH) mergers. study adds ten BBH mergers existing catalogs and provides further evidence for significance level previously identified events. events display interesting features that include unexplored ranges effective spin...

post-mineralization activities may cause difficulties in the process of ore modeling in porphyry deposits. sungun, nw iran, is one of the porphyry copper deposits, in which dyke intrusions have made ore modeling more complicated than expected. among different kinds of dykes, two types were chosen and the consequent geostatistical analyses were applied on. in this study, simple directional vario...

objective: experiencing ‎pleasant events during daily life ‎has a significant positive role in ‎the personal mental health and ‎acts as a keystone for “behavioral ‎activation” (ba) interventions. ‎there are serious differences in ‎the pleasant event schedules in ‎different cultures and countries. ‎we aimed to develop a persian ‎checklist of pleasant events ‎‎(pcpe) to provide and validate a ‎cu...

We note that if the GRB phenomenon follows from the collapse of a massive object forming a black hole and a torus accreting into it, the resulting ejecta can be only related to the mass and angular momentum that characterize the black hole. The opening angle of the fireball then corresponds to a black hole spin. If indeed the fireballs opening angles are as small as recent estimates reported in...

We consider a potentially new class of gravitational wave sources consisting of a white dwarf coalescing into a massive black hole in the mass range ∼ 10 − 10 M⊙. These sources are of particular interest because the gravitational wave signal produced during the inspiral phase can be detected by the Laser Interferometer Space Antenna (LISA) and is promptly followed, in an extended portion of the...

External accretion events such as a galaxy merger or the of gas from immediate environment can create large misalignment between and stellar kinematics. Numerical simulations have suggested that misaligned structures may promote inflow to nucleus by central supermassive black hole. We show for first time galaxies with strong ionized kinematic angles higher observed fraction active holes than al...