Results 51 to 60 of about 881 (177)

Statistical Study on Pulsating Auroras and High‐Latitude Propagation of Chorus Waves Based on Conjugate Observations of Ground‐Based Imagers and Arase Satellite

Journal of Geophysical Research: Space Physics, Volume 131, Issue 7, July 2026.
Abstract Pulsating aurora (PsA) is one of the common diffuse auroras typically generated by ∼10 keV electron precipitation. Precipitating electrons are scattered via wave‐particle interactions with whistler‐mode chorus waves in the magnetosphere. Previous studies have observationally demonstrated that, during PsAs, highly energetic electrons with ...
Y. Ito, Y. Ogawa, M. Fukizawa, Y. Tanaka, A. Kadokura, Y. Miyoshi, K. Hosokawa, A. Shinbori, T. Hori, Y. Kasahara, S. Matsuda, F. Tsuchiya, A. Kumamoto, A. Matsuoka, M. Teramoto, K. Yamamoto, I. Shinohara   +16 more
wiley   +1 more source

The Hubble tension: Relativistic dark matter production from long-lived particles

Nuclear Physics B
The tension between direct measurements of the Hubble constant and those stemming from Cosmic Microwave Background probes has triggered a multitude of studies.
Alvaro S. de Jesus, Matheus M.A. Paixão, Dêivid R. da Silva, Farinaldo S. Queiroz, Nelson Pinto-Neto   +4 more
doaj   +1 more source

Effective Field Theories for heavy probes in a hot QCD plasma and in the early universe

EPJ Web of Conferences, 2017
There are many interesting problems in heavy-ion collisions and in cosmology that involve the interaction of a heavy particle with a medium. An example is the dissociation of heavy quarkonium seen in heavy-ion collisions.
Escobedo Miguel A.
doaj   +1 more source

Modified cosmology through Kaniadakis horizon entropy

European Physical Journal C: Particles and Fields, 2021
We apply the gravity-thermodynamics conjecture, namely the first law of thermodynamics on the Universe horizon, but using the generalized Kaniadakis entropy instead of the standard Bekenstein–Hawking one.
Andreas Lymperis, Spyros Basilakos, Emmanuel N. Saridakis   +2 more
doaj   +1 more source

Quasi‐Periodic X‐Ray Variations at BARREL: Role of Electron Precipitation and Solar Wind Driving

Journal of Geophysical Research: Space Physics, Volume 131, Issue 7, July 2026.
Abstract The Balloon Array for Radiation belt Relativistic Electron Losses (BARREL) mission was designed to study the loss of radiation belt electrons to the upper atmosphere. Previous analysis of data from balloon pairs showed that electron precipitation events manifest coherent quasi‐periodic variations (with periodicity on the order of 10–60 min ...
S. Di Matteo, A. W. Breneman, A. J. Halford, N. M. Viall, L. Kepko, K. Cantwell, R. Millan   +6 more
wiley   +1 more source

The Partition of Energy Flux Transport at Bursty Bulk Flows

Journal of Geophysical Research: Space Physics, Volume 131, Issue 7, July 2026.
Abstract Bursty bulk flows (BBFs) are fast flows of plasma in the tail and are responsible for much of the energy flux transport earthward from the tail into the inner magnetosphere despite being relatively short‐lived. BBFs are often accompanied by injections in which particles that have been accelerated to 10–100s of keV are transported earthward. We
S. N. F. Chepuri, P. H. Reiff, A. N. Jaynes, D. J. Gershman, D. L. Turner, C. Gabrielse, I. J. Cohen, D. N. Baker, T. Leonard   +8 more
wiley   +1 more source

Muon Flux Fluctuations and Solar Phenomena Using Regional Geomagnetic Indices With a Cosmic Ray Detector in Mexico City

Journal of Geophysical Research: Space Physics, Volume 131, Issue 7, July 2026.
Abstract The data from a cosmic ray (CR) detector in Mexico City were collected over a period of 2 years from September 2023 to September 2025, during the maximum phase of Solar Cycle 25. The CR detector consists of an array of scintillators and measures the muonic component of secondary CRs.
D. Martínez‐Montiel, L. Serkin, G. Paić, J. O. Guerra‐Pulido, L. X. González   +4 more
wiley   +1 more source

Dense molecular outflows traced by HCO+ (1-0) and HNC (1-0) in massive star-forming regions

Astronomy & Astrophysics
Context. Molecular outflows are important signposts of star formation since they provide critical feedback to molecular clouds. Aims. We systematically investigate the dynamical and energetic characteristics of dense molecular outflows in 22 massive star-
Kang Yingxue, Wang Junzhi, Li Juan, Liu Shu, Yang Kai, Xu Yani, Luo Rui, Liu Yijia, Mo Fu, Ruan Chang, Su Shaomin   +10 more
doaj   +1 more source

The cosmological nature of the dark Universe

European Physical Journal C: Particles and Fields, 2018
This paper deals with the cancellation mechanism, which identifies the energy density of space-time expansion in an empty universe with the zero-point energy density and avoids the scale discrepancy with the observed energy density (cosmological constant
Christian Henke
doaj   +1 more source

BACK-REACTION IN RELATIVISTIC COSMOLOGY [PDF]

The Thirteenth Marcel Grossmann Meeting, 2013
We introduce the concept of back-reaction in relativistic cosmological modeling. Roughly speaking, this can be thought of as the difference between the large-scale behavior of an inhomogeneous cosmological solution of Einstein's equations, and a homogeneous and isotropic solution that is a best-fit to either the average of observables or dynamics in ...
openaire   +3 more sources