Results 171 to 180 of about 208,249 (317)

Ionospheric D Region: Characteristics Near Dawn and Dusk

Journal of Geophysical Research: Space Physics, Volume 130, Issue 4, April 2025.
Abstract The characteristics of very low frequency (VLF) radio wave propagation in the Earth‐ionosphere waveguide are determined particularly through dawn and dusk using phase and amplitude measurements of man‐made signals propagating below the ionospheric D region. For the first time variations of “Wait” height and sharpness parameters, H' and β, have
Neil R. Thomson, Mark A. Clilverd, Craig J. Rodger   +2 more
wiley   +1 more source

Neutrino Constraints and Detection Prospects from Gamma-Ray Bursts with Different Jet Compositions

The Astrophysical Journal
The prompt emission mechanism of gamma-ray bursts (GRBs) is a long-standing open question, and GRBs have been considered as potential sources of high-energy neutrinos. Despite many years of search for the neutrino events associated with GRBs from IceCube,
Yang-Dong-Jun Ou, Hou-Jun Lü, Xue-Zhao Chang, Xiao-Xuan Liu, En-Wei Liang   +4 more
doaj   +1 more source

Prospects for High Angular Resolution in Gamma-ray Astronomy [PDF]

, 2001
G. K. Skinner
openalex   +1 more source

Python For Gamma-Ray Astronomy

, 2016
Gamma-ray astronomy is a relatively new window on the cosmos. The first source detected from the ground was the Crab nebula, seen by the Whipple telescope in Arizona in 1989. Today, about 150 sources have been detected at TeV energies using gamma-ray telescopes from the ground such as H.E.S.S. in Namibia or VERITAS in Arizona, and about 3000 sources at
openaire   +2 more sources

Seasonality of Internal Tides in the Strait of Hormuz: Observations and Modeling

Journal of Geophysical Research: Oceans, Volume 130, Issue 4, April 2025.
Abstract The seasonality of internal tides in shallow seas is primarily controlled by changes in stratification. This study explores how semidiurnal and diurnal internal tides respond differently to seasonal stratification, using mooring observations and numerical modeling in the Strait of Hormuz, the gateway for hypersaline Arabian Gulf waters ...
M. P. Subeesh, Hajoon Song, Yacine Addad, Jeffery R. Scott, John Marshall, Maryam R. Al Shehhi   +5 more
wiley   +1 more source

Limits on the Low-energy Electron Antineutrino Flux from the Brightest Gamma-Ray Burst of All Time

The Astrophysical Journal
The electron antineutrino flux limits are presented for the brightest gamma-ray burst (GRB) of all time, GRB221009A, over a range of 1.8–200 MeV using the Kamioka Liquid Scintillator Antineutrino Detector. Using multiple time windows ranging from minutes
S. Abe, T. Araki, S. Chauhan, K. Chiba, T. Eda, M. Eizuka, Y. Funahashi, A. Furuto, A. Gando, Y. Gando, S. Goto, T. Hachiya, K. Hata, K. Ichimura, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, N. Kawada, Y. Kishimoto, M. Koga, A. Marthe, Y. Matsumoto, T. Mitsui, H. Miyake, D. Morita, R. Nakajima, K. Nakamura, R. Nakamura, R. Nakamura, J. Nakane, T. Ono, H. Ozaki, K. Saito, T. Sakai, I. Shimizu, J. Shirai, K. Shiraishi, A. Suzuki, K. Tachibana, K. Tamae, H. Watanabe, K. Watanabe, S. Kurosawa, Y. Urano, S. Yoshida, S. Umehara, K. Fushimi, K. Kotera, B. E. Berger, B. K. Fujikawa, J. G. Learned, J. Maricic, Z. Fu, S. Ghosh, J. Smolsky, L. A. Winslow, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, S. Dell’Oro, T. O’Donnell, J. A. Detwiler, S. Enomoto, M. P. Decowski, K. M. Weerman, C. Grant, Ö. Penek, H. Song, A. Li, S. N. Axani, M. Garcia, M. Sarfraz, The KamLAND Collaboration   +74 more
doaj   +1 more source

Erratum: “Ultrahigh-energy gamma-ray emission from the Geminga pulsar” [Pis’ma Astron. Zh. 27, 266 (2001); Astronomy Letters 27, 228 (2001)] [PDF]

, 2001
Yu. I. Neshpor, A. A. Stepanyan, Yu. L. Zyskin, O. Kalekin, V. P. Fomin, N. N. Chalenko, V. G. Shitov   +6 more
openalex   +1 more source

The Isotopic Variation of K and Fe in Apollo 17 Double Drive Tube 73001/2 and Implications for Regolith History and Space Weathering

Journal of Geophysical Research: Planets, Volume 130, Issue 4, April 2025.
Abstract Space weathering alters the surface materials of airless planetary bodies; however, the effects on moderately volatile elements in the lunar regolith are not well constrained. For the first time, we provide depth profiles for stable K and Fe isotopes in a continuous lunar regolith core, Apollo 17 double drive tube 73001/2.
M. Broussard, M. Neuman, B. L. Jolliff, P. Koefoed, R. L. Korotev, R. V. Morris, K. C. Welten, K. Wang   +7 more
wiley   +1 more source

Thermophysical States of MgSiO3 Liquid up to Terapascal Pressures: Implications for Magma Oceans in Super‐Earths and Sub‐Neptunes

Journal of Geophysical Research: Planets, Volume 130, Issue 4, April 2025.
Abstract Thermophysical properties of silicate liquids under extreme conditions are critical for understanding the accretion and evolution of super‐Earths and sub‐Neptunes. The thermal equation of state and viscosity of silicate liquids determine the adiabatic profiles and dynamics of magma oceans. However, these properties are challenging to constrain
Haiyang Luo, Jie Deng
wiley   +1 more source

Evaluating the Potential to Constrain Dark Matter Annihilation with Fermi-LAT Observations of Ultrafaint Compact Stellar Systems

The Astrophysical Journal Letters
Recent results from numerical simulations and models of galaxy formation suggest that recently discovered ultrafaint compact stellar systems (UFCSs) in the halo of the Milky Way (MW) may be some of the smallest and faintest galaxies. If this is the case,
Antonio Circiello, Alex McDaniel, Alex Drlica-Wagner, Christopher Karwin, Marco Ajello, Mattia Di Mauro, Miguel Á. Sánchez-Conde   +6 more
doaj   +1 more source