Results 31 to 40 of about 33,597 (156)

Contrasting Stratospheric Smoke Mass and Lifetime From 2017 Canadian and 2019/2020 Australian Megafires: Global Simulations and Satellite Observations

Journal of Geophysical Research: Atmospheres, Volume 127, Issue 10, 27 May 2022., 2022
Abstract Stratospheric injections of carbonaceous aerosols and combustion gases by extreme wildfires have become increasingly common. Recent “megafires,” particularly large and intense fires, delivered particulate burdens to the lower stratosphere comparable to those of moderate volcanic eruptions.
Gennaro D’Angelo, Steve Guimond, Jon Reisner, David A. Peterson, Manvendra Dubey   +4 more
wiley   +1 more source

World society and field theory: The infiltration of development into humanitarianism

The British Journal of Sociology, Volume 73, Issue 2, Page 402-420, March 2022., 2022
Abstract Differentiated modern society is commonly viewed as an aggregation of various fields, yet the question of their boundaries is often a silent one. This article builds on this lacuna to argue that cultural globalization should be acknowledged and added to the equation.
Nir Rotem
wiley   +1 more source

The anomaly that was not meant IIB

Fortschritte der Physik, Volume 70, Issue 1, January 2022., 2022
Abstract Type IIB supergravity enjoys a discrete non‐Abelian duality group, which has potential quantum anomalies. In this paper we explicitly compute these, and present the bordism group that controls them, modulo some physically motivated assumptions.
Arun Debray, Markus Dierigl, Jonathan J. Heckman, Miguel Montero   +3 more
wiley   +1 more source

Global properties of gravitational lens maps in a Lorentzian manifold setting [PDF]

, 2000
In a general-relativistic spacetime (Lorentzian manifold), gravitational lensing can be characterized by a lens map, in analogy to the lens map of the quasi-Newtonian approximation formalism.
Perlick, Volker
core   +3 more sources

Gravitational lensing by charged black hole in regularized 4D Einstein–Gauss–Bonnet gravity

European Physical Journal C: Particles and Fields, 2020
Among the higher curvature gravities, the most extensively studied theory is the so-called Einstein–Gauss–Bonnet (EGB) gravity, whose Lagrangian contains Einstein term with the GB combination of quadratic curvature terms, and the GB term yields ...
Rahul Kumar, Shafqat Ul Islam, Sushant G. Ghosh   +2 more
doaj   +1 more source

Some Bianchi Type Viscous Holographic Dark Energy Cosmological Models in the Brans–Dicke Theory

Advances in Astronomy, Volume 2022, Issue 1, 2022., 2022
In this article, we analyze Bianchi type–II, VIII, and IX spatially homogeneous and anisotropic space‐times in the background of the Brans–Dicke theory of gravity within the framework of viscous holographic dark energy. To solve the field equations, we have used the relation between the metric potentials as R = Sn and the relation between the scalar ...
M. Vijaya Santhi, T. Chinnappalanaidu, S. Srivani Madhu, Daba Meshesha Gusu, M. Sharif   +4 more
wiley   +1 more source

A Hamiltonian, post-Born, three-dimensional, on-the-fly ray tracing algorithm for gravitational lensing [PDF]

Journal of Cosmology and Astroparticle Physics
The analyses of the next generation cosmological surveys demand an accurate, efficient, and differentiable method for simulating the universe and its observables across cosmological volumes. We present Hamiltonian ray tracing (HRT) — the first post-Born (
Alana J Zhou, Yin Li, S. Dodelson, Rachel Mandelbaum, Yucheng Zhang, Xiangchong Li, G. Fabbian   +6 more
semanticscholar   +1 more source

Reconstructing the Thermal Sunyaev-Zel'dovich Effect in 3D [PDF]

, 2014
The thermal Sunyaev-Zel'dovich (tSZ) effect measures the line-of-sight projection of the thermal pressure of free electrons and lacks any redshift information. By cross correlating the tSZ effect with an external cosmological tracer we can recover a good
Munshi, Dipak, Pratten, Geraint
core   +1 more source

Multiple imaging by gravitational waves [PDF]

, 1997
Gravitational waves act like lenses for the light propagating through them. This phenomenon is described using the vector formalism employed for ordinary gravitational lenses, which was proved to be applicable also to a non-stationary spacetime, with the
Braginsky V. B., Carr B. J., Fakir R., Faraoni V., Frieman J. A., Labeyrie A., Linder E. V., Udalski A., VALERIO FARAONI, Winterberg F.   +9 more
core   +3 more sources

Gravitational lensing in a plasma from worldlines [PDF]

Physical Review D
We study the deflection of light rays in a cold, nonmagnetized plasma using the worldline framework. Starting from Synge’s Hamiltonian formalism, we construct a position-space action and use it perturbatively to calculate light bending angles.
F. Comberiati, Leonardo de la Cruz
semanticscholar   +1 more source