Results 111 to 120 of about 32,756 (306)

Strong field limit analysis of gravitational retro-lensing

, 2003
We present a complete treatment in the strong field limit of gravitational retro-lensing by a static spherically symmetric compact object having a photon sphere.
A. Bhadra, D.E. Holtz, Diego F. Torres, E. Algol, E.F. Eiroa, Ernesto F. Eiroa, F. De Paolis, K.S. Virbhadra, K.S. Virbhadra, R. Schödel, S. Capozziello, S. Frittelli, V. Bozza, V. Bozza, V. Bozza, V. Bozza   +15 more
core   +1 more source

Generation of Oil‐In‐Water Emulsion‐Core Sodium Alginate Beads

Macromolecular Chemistry and Physics, EarlyView.
A core‐shell encapsulation platform is developed by embedding oil‐in‐water emulsions within alginate shells. Optimized formulations with mineral oil, CMC, and non‐ionic surfactants produce uniform spherical beads with tunable core sizes and shell thicknesses.
Fariba Malekpour Galogahi, Du Tuan Tran, Lingxi Ouyang, Nam‐Trung Nguyen   +3 more
wiley   +1 more source

Mass discrepancy in galaxy clusters as a result of the offset between dark matter and baryon distributions

, 2010
Recent studies of lensing clusters reveal that it might be fairly common for a galaxy cluster that the X-ray center has an obvious offset from its gravitational center which is measured by strong lensing. We argue that if these offsets exist, then X-rays
Allen, Baldi, Bartelmann, Bartelmann, Bo Qin, Bonamente, Bradac, Clowe, Dunn, Gioia, Hong Sheng Zhao, Huan Yuan Shan, Jee, Kneib, Limousin, Loeb, Markevitch, Morandi, Navarro, Nevalainen, Piffaretti, Richard, Sand, Sanderson, Shan, Smith, Tucker, Wu, Wu, Wu, Xu   +30 more
core   +2 more sources

Pulsed Laser Ablation in Liquid: Numerical Evaluation of Laser Fluence

physica status solidi (RRL) – Rapid Research Letters, EarlyView.
Pulsed laser ablation in liquid is a very powerful technique that allows to synthesize colloidal solution of nanoparticles (NPs) without waste. Herein, a computational approach that given the experimental parameters and draws the laser ray paths inside the experimental apparatus is developed, the effective fluence on the target surface is evaluated ...
Cristiano Lo Pò, Francesco Ruffino, Maria Grazia Grimaldi, Stefano Boscarino   +3 more
wiley   +1 more source

Nonsingular density profiles of dark matter halos and Strong gravitational lensing

, 2005
We use the statistics of strong gravitational lenses to investigate whether mass profiles with a flat density core are supported. The probability for lensing by halos modeled by a nonsingular truncated isothermal sphere (NTIS) with image separations ...
Bartelmann M., Chen D.-M., Chen D.-M., Da‐Ming Chen, Fukugita M., Fukugita M., Ostriker J. P., Patnaik A. R., Wang J., Wu X.-P.   +9 more
core   +3 more sources

Strong deflection gravitational lensing

, 2012
In this work are reviewed several aspects of gravitational lensing produced by astrophysical bodies that strongly curve the spacetime in their vicinity. When an object with a photon sphere (e.g. a black hole) is interposed between a source and an observer, in addition to primary and secondary images due to small deflections of the light rays, there are
openaire   +2 more sources

Evaluation of video evidence of possible ball lightning

Quarterly Journal of the Royal Meteorological Society, EarlyView.
We analyze images of possible ball lightning that appeared less than 10 m from a video camera. The objects' velocity and estimated brightness all agree with typical eyewitness accounts of ball lightning. Though there is an alternative explanation that the objects were sparks from a power‐line arc, we describe analytical techniques that assist in ...
K. Stephan, R. Sonnenfeld, J. Bertoloni
wiley   +1 more source

Gravitational lensing by deformed Horava-Lifshitz black hole in rainbow gravity

Physics Letters B
In this study, we investigate the gravitational lensing effects of deformed Horava-Lifshitz black holes, considering both strong and weak-field limit approximations and incorporating the impact of rainbow functions.
Aniruddha Ghosh, Ujjal Debnath
doaj   +1 more source

Strong biases in infrared-selected gravitational lenses [PDF]

Monthly Notices of the Royal Astronomical Society, 2012
Note added in proof citing Hezaveh et al. (arXiv:1203.3267); other minor changes made to match page proofs. MNRAS in press. 14 pages, 13 figures.
openaire   +3 more sources

The Biased Interaction Game: A System Theoretic Approach to the Emergence of Inequality, Hierarchy, and the Implications for the Likelihood of Cooperation

Systems Research and Behavioral Science, EarlyView.
ABSTRACT The emergence of cooperation in natural selection has been successfully studied using game theory and, despite the underlying selfish nature of the evolutionary process, a spectrum of plausible mechanisms have been proposed to determine the conditions under which cooperative behaviour is likely to occur.
Phil Mercy, Martin Neil
wiley   +1 more source