Results 71 to 80 of about 7,472 (181)

Numerical Simulations for Optimizing Small Satellite Constellations for TGF Studies

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 8, 28 April 2025.
Abstract The detection of Terrestrial Gamma ray Flashes (TGFs) from space is mostly made by astrophysics satellites, which only provide single‐point measurements. Future TGF missions could consist in performing simultaneous detection by a detector array in space.
Melody Pallu, Sebastien Celestin, Philippe Laurent   +2 more
wiley   +1 more source

Pre-burst neutrinos of gamma-ray bursters accompanied by high-energy photons

Physics Letters B, 2021
Previous researches on high-energy neutrino events from gamma-ray bursters (GRBs) suggest a neutrino speed variation v(E)=c(1±E/ELVν) with ELVν=(6.4±1.5)×1017 GeV, together with an intrinsic time difference Δtin=(−2.8±0.7)×102 s, which means that high ...
Jie Zhu, Bo-Qiang Ma
doaj   +1 more source

Review on Uniaxial Negative Thermal Expansion of Tr‐Zr Superconductors

MetalMat, Volume 2, Issue 1, March 2025.
In this paper, we review recent research progress of a study of uniaxial negative thermal expansion (NTE) along the c‐axis with transition (Tr) metal zirconide TrZr2 and TrZr3 superconductors. We introduce the unique thermal expansion properties of TrZr2 and TrZr3 and the flexibility of controlling thermal expansion properties.
Yuto Watanabe, Yoshikazu Mizuguchi
wiley   +1 more source

Unveiling the Origin of the Fermi Bubbles

Galaxies, 2018
The Fermi bubbles, two giant structures above and below the Galactic center (GC), are among the most important discoveries of the Fermi Gamma-ray Space Telescope.
H.-Y. Karen Yang, Mateusz Ruszkowski, Ellen G. Zweibel   +2 more
doaj   +1 more source

TeV Dark Matter Searches in the Extragalactic Gamma-ray Sky

Galaxies, 2022
High-energetic gamma rays from astrophysical targets constitute a unique probe for annihilation or decay of heavy particle dark matter (DM). After several decades, diverse null detections have resulted in strong constraints for DM particle masses up to ...
Moritz Hütten, Daniel Kerszberg
doaj   +1 more source

Initial Thermal States of Super‐Earth Exoplanets and Implications for Early Dynamos

Journal of Geophysical Research: Planets, Volume 130, Issue 2, February 2025.
Abstract The accretion of Earth and the formation of a metallic core released a large amount of primordial heat and may have enabled its evolution into a habitable world. Metal‐silicate segregation likely occurs in super‐Earth exoplanets as well, but its influence on their initial thermal states has not been fully examined.
Nathaniel I. White, Jie Li
wiley   +1 more source

The Statistical Analysis of GeV Spectral Breaks in Bright Gamma-Ray Flat-spectrum Radio Quasars

The Astrophysical Journal Supplement Series
We present the statistical results of GeV spectral breaks of bright gamma-ray flat-spectrum radio quasars (FSRQs) in the energy range of 0.1–10 GeV based on New Pass 8 data of the Large Area Telescope on board Fermi Gamma-Ray Space Telescope.
K. R. Zhu, J. M. Chen, L. Zhang
doaj   +1 more source

Fermi Gamma-ray Space Telescope Observations of the Gamma-ray Outburst from 3C454.3 in November 2010

, 2012
The flat-spectrum radio quasar 3C454.3 underwent an extraordinary 5-day γ-ray outburst in November 2010 when the daily flux measured with the Fermi Large Area Telescope (LAT) at photon energies E > 100MeV reached (66±2) × 10−6ph cm−2s−1. This is a factor
B. Lott, C. Dermer, L. Escande
semanticscholar   +1 more source

Gamma Ray Bursts and the Fermi Gamma Ray Space Telescope: Notes to the La Plata Lectures

, 2008
33 pages; notes to a series of 5 one-hour lectures given at the First La Plata School in Astrophysics and Geophysics, La Plata, Argentina, March 10 - 14 ...
Dermer, Charles D., Fryer, Chris L.
openaire   +2 more sources

Investigation of the Mechanical, Electronic, and Optical Properties in PtLuSb (Platinum–Lutetium Antimonide) Topological Insulator

Advances in Condensed Matter Physics, Volume 2025, Issue 1, 2025.
Topological insulators (TIs) are becoming a great, fascinating compound due to their multidimensional applications in quantum computing, spintronics, and advanced technology. Recently, some half‐Heusler compounds exhibit topologically insulating behaviors and are predicted to be TIs.
Md. Ali Munna, Md. Shah Alam, Yulong Bai
wiley   +1 more source