Results 61 to 70 of about 3,997 (213)

Gamma ray spectroscopy in astrophysics [PDF]

, 1978
Experimental and theoretical aspects of gamma ray spectroscopy in high energy astrophysics are discussed. Line spectra from solar, stellar, planetary, and cosmic gamma rays are examined as well as HEAO investigations, the prospects of a gamma ray ...
Cline, T. L., Ramaty, R.
core  

From the Gulf of Guinea to the Global Stage: Africa’s Voice in the Age of Climate Intervention

Perspectives of Earth and Space Scientists, Volume 7, Issue 1, December 2026.
Abstract Climate intervention technologies, Solar Radiation Management (SRM) and marine Carbon Dioxide Removal (mCDR), are moving from theoretical proposal to serious policy consideration, yet the scientific communities and governance frameworks shaping these decisions remain concentrated in the Global North, while the populations most exposed to ...
Frédéric Kpèdonou Bonou
wiley   +1 more source

Evidence of a significant rotational non-LTE effect in the CO₂ 4.3 µm PFS-MEX limb spectra [PDF]

Atmospheric Measurement Techniques, 2017
Since January 2004, the planetary Fourier spectrometer (PFS) on board the Mars Express satellite has been recording near-infrared limb spectra of high quality up to the tangent altitudes ≈ 150 km, with potential information on density and thermal ...
A. A. Kutepov, L. Rezac, A. G. Feofilov
doaj   +1 more source

Intense Magnetopause Erosion at Earth During the May 2024 Solar Storm

Geophysical Research Letters, Volume 53, Issue 21, 16 November 2026.
Abstract Earth's main magnetic field forms the magnetosphere, shielding the planet from solar wind plasma. Southward interplanetary magnetic fields erode the magnetosphere, a process known as magnetopause erosion, allowing solar wind penetration close to the Earth.
Kazuhiro Yamamoto, Yoshizumi Miyoshi, Naritoshi Kitamura, Rumi Nakamura, Atsuki Shinbori, Ayako Matsuoka, Mariko Teramoto, Shoichiro Yokota, Satoshi Kasahara, Kunihiro Keika, Tomoaki Hori, Kazushi Asamura, Yoichi Kazama, Shiang‐Yu Wang, Sunny Wing‐Yee Tam, Tzu‐Fang Chang, Bo‐Jhou Wang, Chae‐Woo Jun, Iku Shinohara   +18 more
wiley   +1 more source

Fundamentals of Stars II: Revisiting Bolometric Corrections

Physics and Astronomy Reports
Luminous efficiency and heat index were two previously suggested auxiliary tools for calibrating stellar temperature scales before the term “bolometric correction” (BC) introduced for the same purpose by Kuiper in 1938, as 𝐵𝐶 = 𝑀bol−𝑀V = 𝑚bol−𝑉.
Zeki Eker, Volkan Bakış
doaj   +1 more source

The Galactic Aluminum Conundrum in the Light of New Data at Astrophysical Energies [PDF]

EPJ Web of Conferences
The abundance of 26Al plays a crucial role in astrophysics, as it traces ongoing nucleosynthesis in the Milky Way and constrains the Galactic core-collapse supernova rate.
La Cognata Marco
doaj   +1 more source

Empirical Parameterizations of ULF Power and Drift Orbit Averaged Radial Diffusion Coefficients From Ground Magnetometers for Different MLT

Earth and Space Science, Volume 13, Issue 11, November 2026.
Abstract Radial diffusion, driven by ultra‐low frequency (ULF) waves, is an important process for the transport of electrons in the outer radiation belt. Ground magnetometers give us constant observations of such ULF waves but their usefulness is limited by the models used to transform ground measurements into their progenitor fields in space.
S. Dimitrakoudis, G. Balasis, A. Z. Boutsi, I. A. Daglis, C. Papadimitriou, C. Katsavrias, M. Georgiou, J. Lichtenberger   +7 more
wiley   +1 more source

The Effect of Turbulence on the Angular Momentum of the Solar Wind

The Astrophysical Journal Letters
The transfer of a star’s angular momentum to its atmosphere is a topic of considerable and wide-ranging interest in astrophysics. This Letter considers the effect of kinetic and magnetic turbulence on the solar wind’s angular momentum.
Rohit Chhiber, Arcadi V. Usmanov, William H. Matthaeus, Francesco Pecora   +3 more
doaj   +1 more source

AstroMMBench: A Benchmark for Evaluating Multimodal Large Language Model Capabilities in Astronomy

Universe
Astronomical image interpretation requires not only visual perception, but also familiarity with domain-specific representations, observational conventions, and astrophysical reasoning.
Jinghang Shi, Xiaoyu Tang, Yang Huang, Yuyang Li, Yanxia Zhang, Xiao Kong, Caizhan Yue, A-Li Luo   +7 more
doaj   +1 more source

Physics-informed neural networks for modeling astrophysical shocks

Machine Learning: Science and Technology, 2023
Physics-informed neural networks (PINNs) are machine learning models that integrate data-based learning with partial differential equations (PDEs).
S P Moschou, E Hicks, R Y Parekh, D Mathew, S Majumdar, N Vlahakis   +5 more
doaj   +1 more source