Results 81 to 90 of about 3,856 (262)

Gravitational waves and astrophysical sources

Comptes Rendus. Physique, 2013
In linear approximation to general relativity, gravitational waves can be thought of as perturbation of the background metric that propagate at the speed of light. A time-varying quadrupole of matter distribution causes the emission of gravitational waves.
openaire   +1 more source

Plasmakristall‐4 Experiment: 10 Years of Operation in Orbit

Contributions to Plasma Physics, EarlyView.
ABSTRACT Plasmakristall‐4 (PK‐4) is a microgravity complex plasma laboratory operated for 10 years on board the International Space Station. Its main purpose is the particle‐resolved investigation of generic condensed matter phenomena using strongly coupled suspensions of microparticles immersed in low‐pressure gas‐discharge plasmas.
M. Pustylnik, H. M. Thomas, M. Kretschmer, M. Thoma   +3 more
wiley   +1 more source

Probing the Peak of Star Formation with the Stochastic Background of Binary Black Hole Mergers

The Astrophysical Journal
Although the LIGO–Virgo–KAGRA collaboration detects many individually resolvable gravitational-wave events from binary black hole mergers, those that are too weak to be identified individually contribute to the stochastic gravitational-wave background ...
Nico Bers, Sylvia Biscoveanu
doaj   +1 more source

Precision cosmology from future lensed gravitational wave and electromagnetic signals

Nature Communications, 2017
Gravitational wave sources can be used as cosmological probes through a direct distance luminosity relation. Here, the authors demonstrate that the time delay between lensed gravitational wave signals and their electromagnetic counterparts can reduce the
Kai Liao, Xi-Long Fan, Xuheng Ding, Marek Biesiada, Zong-Hong Zhu   +4 more
doaj   +1 more source

Few‐Photon Fluorescence From Ultracold Bosons in an Optical Cavity

Contributions to Plasma Physics, EarlyView.
ABSTRACT Within a cavity quantum electrodynamics framework, we analyse the fluorescent spectrum of ultracold bosons in resonant and second‐harmonic generation (SHG) regimes. Two settings are considered: (i) (few) bosons in an optical lattice and (ii) a trapped two‐component dilute Bose–Einstein condensate (2BEC) within the Bogoliubov scheme.
Megha Gopalakrishna, Emil Viñas Boström, Claudio Verdozzi   +2 more
wiley   +1 more source

Photothermal bubble: Dynamics, manipulation, and applications

Droplet, EarlyView.
As a versatile platform for bubble manipulation, photothermal techniques empower diverse operations: planar translation by scanning the laser spot, sustained periodic bouncing from competing thermal and hydrodynamic flows, and even guided 3D trajectories achieved by tailoring the heating configuration.
Man Hu, Feng Wang, Daosheng Deng
wiley   +1 more source

GECKO Follow-up Observations of the Binary Neutron Star–Black Hole Merger Candidate S230518h

The Astrophysical Journal
The gravitational-wave (GW) event S230518h is a potential binary neutron star–black hole merger (NSBH) event that was detected during engineering run 15, which served as the commissioning period before the LIGO–Virgo–KAGRA O4a observing run.
Gregory S. H. Paek, Myungshin Im, Mankeun Jeong, Seo-Won Chang, Martin Moonkuk Hur, YoungPyo Hong, Sophia Kim, Jaewon Lee, Dongjin Lee, Seong-Heon Lee, Jae-Hun Jung, Joonho Kim, Hyung Mok Lee, Chung-Uk Lee, Seung-Lee Kim   +14 more
doaj   +1 more source

Instability mechanism and failure characteristics of underground cavern in block system under the action of seismic waves

Deep Underground Science and Engineering, EarlyView.
Seismic waves with tensile stress, high amplitude, and low frequency are most likely to trigger block instability and sliding. Blocks with a single sliding surface are more prone to movement than those with multiple constraints, and roof‐positioned blocks are especially vulnerable to slide.
Xiao Wang, Jinxiao Liu, Gaoshuo Zhang, Wenxin Li, Changdi He   +4 more
wiley   +1 more source

Electromagnetic counterparts of gravitational wave sources at the Very Large Telescope. [PDF]

Nat Rev Phys, 2020
Levan AJ, Jonker PG.
europepmc   +1 more source

Advancing mine pillar design: Evaluating traditional methods and integrating AI for enhanced stability of pillars in the Great Dyke, Zimbabwe

Deep Underground Science and Engineering, EarlyView.
B1 is bord width 1, B2 is bord width 2, L is the pillar length, W is the pillar width, red color and letter A represent the pillars, and white color and number 1 represent excavated areas. Pstress is the average pillar stress; σv is the vertical component of the virgin stress, MPa; and e is the areal extraction ratio. e = B o B o + B P ${\rm{e}}=\frac{{
Tawanda Zvarivadza, Hendrik Grobler, Peter Apata Olubambi, Moshood Onifade, Manoj Khandelwal   +4 more
wiley   +1 more source