Results 41 to 50 of about 53,020 (220)
Analysis of the Consecutive X‐Ray Flares Effects on the Lower Ionosphere
Space WeatherX‐ray is a critical factor in generating electrons in the lower ionosphere, however, the cumulative effects of consecutive X‐ray flares on the lower ionosphere remain understudied due to the scarcity of historical events.
Shuai Wang +5 more
doaj +1 more source
STATISTICS OF X-RAY FLARES OF SAGITTARIUS A⋆: EVIDENCE FOR SOLAR-LIKE SELF-ORGANIZED CRITICALITY PHENOMENA [PDF]
, 2015 X-ray flares have routinely been observed from the supermassive black hole at our Galactic center, Sagittarius A ⋆ ?> (Sgr A⋆). The nature of these flares remains largely unclear, despite many theoretical models.
Ya-Ping Li +8 more
semanticscholar +1 more source
steel research international, EarlyView.H2 prereduction selectively metallizes Fe in UG2 chromite pellets at 1100°C, while silicon carbide becomes active at 1300°C to convert remaining Cr2O3 to carbides and promote Cr metallization. By separating the roles of H2 and SiC, the sequential route reaches up to 65.7% Cr metallization and suppresses in‐furnace CO generation by ≈75% versus ...
D. Coertzen +5 more
wiley +1 more source
X‐Ray Observations of Solar Long‐Duration Flares
The Astrophysical Journal, 2005 Yohkoh X-ray observations during the several-hour decay of six large solar flares show that the main emitting region is in the form of a bright loop-top source whose spatial extent well after the impulsive stage explains most of the broadening of S XV and Ca XIX X-ray lines, which would otherwise imply nonthermal velocities of 100 km s-1 or more ...
Kjh Phillips +3 more
openaire +2 more sources
Role of hard X-ray emission in ionospheric D-layer disturbances during solar flares
Earth, Planets and Space, 2022 Any disturbance of the ionosphere may affect operational activities based on HF communication. The electron density is a critical parameter that controls levels of HF-signal absorption.
Carine Briand +3 more
doaj +1 more source
Size dependence of solar X-ray flare properties [PDF]
, 2005 Non-thermal and thermal parameters of 85 solar flares of GOES class B 1 to M6 (background subtracted classes A1 to M6) have been compared to each other.
M. Battaglia, P. Grigis, A. O. Benz
semanticscholar +1 more source
Spaceborne and spaceborn: Physiological aspects of pregnancy and birth during interplanetary flight
Experimental Physiology, EarlyView.Abstract Crewed interplanetary return missions that are on the planning horizon will take years, more than enough time for initiation and completion of a pregnancy. Pregnancy is viewed as a sequence of processes – fertilization, blastocyst formation, implantation, gastrulation, placentation, organogenesis, gross morphogenesis, birth and neonatal ...
Arun V. Holden
wiley +1 more source
The Efficiency of Electron Acceleration during the Impulsive Phase of a Solar Flare
The Astrophysical Journal Letters, 2023 Solar flares are known to be prolific electron accelerators, yet identifying the mechanism(s) for such efficient electron acceleration in solar flare (and similar astrophysical settings) presents a major challenge.
Eduard P. Kontar +3 more
doaj +1 more source
Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.Abstract A new proton radiation belt was identified during the geomagnetic superstorm of 10–11 May 2024. To investigate its origin, we use an MHD‐test particle simulation to model solar energetic proton (SEP) trapping and the evolution of the initial trapped proton population during the storm.
Murong Qin +10 more
wiley +1 more source
Repeating Nuclear Transients From Repeating Partial Tidal Disruption Events
Astronomische Nachrichten, Volume 347, Issue 5, June 2026.ABSTRACT Extragalactic nuclear transients that exhibit repeating outbursts can be modeled as the repeated dynamical interaction between bound stars and supermassive black holes (SMBHs). A subset of these transients, with recurrence timescales of months‐to‐years, have been explained as accretion flares from the repeated tidal stripping of a star by an ...
Ananya Bandopadhyay +4 more
wiley +1 more source