Results 121 to 130 of about 598,934 (258)

Map of Jupiter's Radiation Environment From Juno's In‐Situ Observations

open access: yesJournal of Geophysical Research: Planets, Volume 130, Issue 3, March 2025.
Abstract Since its orbit insertion on 4 July 2016, the Juno spacecraft has orbited Jupiter in a highly elliptical, polar orbit. With every orbit, Juno's line of apsides migrates, increasing the angle relative to the Jovian equator. Therefore, the spacecraft traverses across the inner regions of the radiation belt, where energetic particles are trapped.
M. Herceg   +9 more
wiley   +1 more source

Observational test of inflation in loop quantum cosmology [PDF]

open access: yes, 2011
We study in detail the power spectra of scalar and tensor perturbations generated during inflation in loop quantum cosmology (LQC). After clarifying in a novel quantitative way how inverse-volume corrections arise in inhomogeneous set- tings, we show ...
M. Bojowald, G. Calcagni, S. Tsujikawa
semanticscholar   +1 more source

A new mechanism for freezing extra dimensions with higher-order curvature terms

open access: yesPhysics Letters B, 2020
We construct a model of higher dimensional cosmology in which extra dimensions are frozen by virtue of the cubic-order Lovelock gravity throughout the cosmic history from inflation to the present with radiation and matter-dominated regimes in between.
Hiroaki W.H. Tahara   +2 more
doaj  

Eternal inflation and chaotic terminology [PDF]

open access: yesarXiv, 2004
``Eternal inflation'' is often confused with ``chaotic inflation''. Moreover, the term ``chaotic inflation'' is being used in three different meanings (all of them unrelated to eternal inflation). I make some suggestions in an effort to untangle this terminological mess. I also give a brief review of the origins of eternal inflation.
arxiv  

Crack Development Inside and Around Lunar Lava Tubes

open access: yesJournal of Geophysical Research: Planets, Volume 130, Issue 3, March 2025.
Abstract Evidence shows that lava tubes on the Moon, which constitute intriguing targets for exploration and long‐term habitation, could be much larger than terrestrial tubes. However, existing observation strategies cannot confidently constrain the exact dimensions of lunar tubes in anticipation of in situ exploration.
E. A. Williams, L. G. J. Montési
wiley   +1 more source

Inflationary Cosmology in Anisotropic Inflation Models

open access: yesIranian Journal of Physics Research, 2018
In this work, we study the anisotropic inflationary models . In these models,  an abelian gauge field  non-minimally coupled to the inflaton field plays a role in the inflation dynamicIn a gauge field,the backgroundanswer is anisotropic, in the
H Firouzjahi, A A Abolhasani
doaj  

Clockwork axions in cosmology. Is chromonatural inflation chrononatural?

open access: yesJournal of High Energy Physics, 2018
Many cosmological models rely on large couplings of axions to gauge fields. Examples include theories of magnetogenesis, inflation on a steep potential, chiral gravitational waves, and chromonatural inflation. Such theories require a mismatch between the
Prateek Agrawal, JiJi Fan, Matthew Reece
doaj   +1 more source

Inflation from Susy quantum cosmology

open access: yes, 2004
We propose a realization of inverted hybrid inflation scenario in the context of n=2 supersymmetric quantum cosmology. The spectrum of density fluctuations is calculated in the de Sitter regimen as a function of the gravitino and the Planck mass, and ...
A. Linde   +27 more
core   +1 more source

Risk and its others: Toward an anthropology of “protection” in rural Mongolia

open access: yesAmerican Anthropologist, Volume 127, Issue 1, Page 69-79, March 2025.
Abstract Anthropological studies of risk have long focused on how people respond to and aim to manage potential harm. But despite its long and important genealogy, this article suggests that risk can pose an analytic blind spot that potentially occludes other ways of understanding how people aim to live well in potentially harmful situations.
Joseph Bristley
wiley   +1 more source

Recent Developments in Degenerate Higher Order Scalar Tensor Theories

open access: yesAnnalen der Physik, Volume 537, Issue 2, February 2025.
Degenerate Higher Order Scalar Tensor theories are reviewed, together with their applications in cosmology and astrophysics. These theories have been applied to build models of the early universe, in the description of the late‐time cosmic acceleration, as well as in astrophysics, including black hole physics. They have the potential to provide answers
Andrei Lazanu
wiley   +1 more source

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