Results 71 to 80 of about 20,646,849 (184)

The high energy X-ray probe (HEX-P): the most powerful jets through the lens of a superb X-ray eye

Frontiers in Astronomy and Space Sciences
A fraction of the active supermassive black holes at the centers of galaxies in our Universe are capable of launching extreme kiloparsec-long relativistic jets.
Lea Marcotulli, Lea Marcotulli, Marco Ajello, Markus Böttcher, Paolo Coppi, Luigi Costamante, Laura Di Gesu, Manel Errando, Javier A. García, Javier A. García, Andrea Gokus, Ioannis Liodakis, Ioannis Liodakis, Greg Madejski, Kristin Madsen, Alberto Moretti, Riccardo Middei, Riccardo Middei, Felicia McBride, Maria Petropoulou, Bindu Rani, Bindu Rani, Tullia Sbarrato, Daniel Stern, Georgios Vasilopoulos, Michael Zacharias, Michael Zacharias, Haocheng Zhang, Haocheng Zhang, the HEX-P Collaboration   +29 more
doaj   +1 more source

High-Energy and Ultra-High-Energy Neutrino Astrophysics

The origin of high-energy cosmic rays, and their behavior in astrophysical sources, remains an open question. Recently, new ways to address this question have been made possible by the observation of a new astrophysical messenger, namely neutrinos.
Fiorillo, Damiano F. G., Damiano F. G. Fiorillo   +1 more
core   +1 more source

Atmospheric Cerenkov astronomy of cataclysmic variables & other potential gamma ray sources [PDF]

, 1993
Recent developments in the application of the atmospheric Cerenkov technique to 7-ray astronomy are reviewed here. These include new methods of signal to noise enhancement and the increasing diversity of stellar systems positively identified as Very High
Bradbury, S.M, Bradbury, Stella Marie
core  

Machine Learning Modeling of Narrow SAID‐Like Spikes in Duskside Subauroral Flows From 11‐Year DMSP Observations

Space Weather, Volume 24, Issue 11, November 2026.
Abstract Subauroral ion drifts (SAID) are narrow, intense westward plasma flows. However, their narrow latitudinal distribution and possible overlap with broader subauroral flows pose significant challenges for accurate modeling. This study proposes a dual‐modal model that takes magnetic latitude, magnetic local time, day of year, solar F10.7 index ...
Haobo Hu, Xinshuang Pan, Shuhan Li, Jing Liu, Xuanqing Liu, Yu Jiao, Tianyu Cao   +6 more
wiley   +1 more source

The need for ultra high resolution X-ray imaging

Frontiers in Astronomy and Space Sciences
This paper discusses the broad science case for obtaining milliarcsecond to microarcsecond astronomical imaging resolution in the soft to medium-energy X-ray band (∼0.5 to ∼8 keV).
Kimberly A. Weaver, Jenna M. Cann, Jenna M. Cann, Jenna M. Cann, Ryan Pfeifle, Ryan Pfeifle, Ryan Pfeifle, Miranda McCarthy, Miranda McCarthy, Laura D. Vega, Laura D. Vega, Laura D. Vega, Ronald S. Gamble, Ronald S. Gamble, Ronald S. Gamble, Teresa Monsue, Teresa Monsue, Teresa Monsue, Kyla Mullaney, Kyla Mullaney, Kyla Mullaney, Mainak Singha, Mainak Singha, Mainak Singha, Erini Lambrides, Erini Lambrides, Erini Lambrides, Jeffrey McKaig, Jeffrey McKaig, Isabella Carlton, Kelly Whalen, Kelly Whalen, Emma Kleiner, Atul Mohan, Atul Mohan, Subhajeet Karmakar, Subhajeet Karmakar, Ann E. Hornschemeier, Herbert Ortiz, Claudio Ricci, Claudio Ricci, Claudio Ricci, Lynne Valencic, Lynne Valencic, Brandon Coleman, Brandon Coleman, Kaylee DeGennaro, Ruchi Pandey, Ruchi Pandey   +48 more
doaj   +1 more source

VSiPMT a new photon detector

EPJ Web of Conferences, 2016
Photon detection is a key factor to study many physical processes in several areas of fundamental physics research. Focusing the attention on photodetectors for particle astrophysics, the future experiments aimed at the study of very high-energy or ...
Di Capua F., Barbarino G., Barbato F.C.T., Campajola L., de Asmundis R., De Rosa G., Migliozzi P., Mollo C.M., Vivolo D.   +8 more
doaj   +1 more source

Exploring Jupiter's Mid‐Latitude Dusk Magnetopause: The Impact of Magnetic Reconnection

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract The Juno mission has elucidated magnetosphere processes, structure, and dynamics via multi‐instrument plasma and magnetic field observations. In this study, these instruments are used to identify magnetic reconnection during the Juno extended mission from a survey of 490 magnetopause crossings at the mid‐latitude southern dusk magnetopause ...
J. Montgomery, P. A. Delamere, A. R. Smith, C. Spitler, G. Fuller, R. W. Ebert, F. Allegrini, S. A. Fuselier, R. J. Wilson   +8 more
wiley   +1 more source

X-ray transients in the Chandra archive

Astronomy & Astrophysics
X-ray transients on sub-observation timescales represent a diverse and underexplored class of astrophysical phenomena, from stellar flares and magnetar bursts to extragalactic fast transients and supernova shock breakouts.
Saathoff I., Larsson J.
doaj   +1 more source

Gamma‐Ray Glows Commonly Followed by Lightning: A Statistical Study of the Spatio‐Temporal Relationship

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract Gamma‐ray glows are prolonged enhancements of gamma rays from thunderclouds, which are often linked to large‐scale electric fields rather than individual lightning. The link between glows and lightning remains poorly understood. Here, we analyzed 300 glows observed during the ALOFT aircraft campaign and optical lightning detected by GLM.
Chu‐Nan Zhang, Yunjiao Pu, Steven Cummer, Martino Marisaldi, Nikolai Østgaard, Andrey Mezentsev, Ingrid Bjørge‐Engeland, Øystein Håvard Færder, David Alexandre Stephan Sarria, Nikolai G. Lehtinen, Anders Nødland Fuglestad   +10 more
wiley   +1 more source

Simulating ULXs and Blazars as GRMHD Accretion Flows Around a Black Hole

The Astrophysical Journal
General relativistic magnetohydrodynamic (GRMHD) simulations have been instrumental in our understanding of high-energy astrophysical phenomena over the past two decades.
Mayank Pathak, Banibrata Mukhopadhyay
doaj   +1 more source