Multi-observatory Study of Young Stellar Energetic Flares (MORYSEF): No Evidence for Abnormally Strong Stellar Magnetic Fields after Powerful X-Ray Flares [PDF]
The Astrophysical JournalWe explore the empirical power-law relationship between X-ray luminosity ( L _X ) and total surface magnetic flux (Φ), established across solar magnetic elements, time- and disk-averaged emission from the Sun, older active stars, and pre-main-sequence ...
Konstantin V. Getman +11 more
doaj +13 more sources
Solar–Stellar Connection: X-Ray Flares to Energetic (E > 10 MeV) Particle Events
The Astrophysical Journal, 2023 Energetic particle environments are an important factor for the viability of life on exoplanets surrounding flare stars. In the heliosphere, large gradual solar energetic ( E > 10 MeV) particle (SEP) events are produced by shocks from fast coronal mass ...
S. W. Kahler, A. G. Ling
doaj +4 more sources
Effect of Time-varying X-Ray Emission from Stellar Flares on the Ionization of Protoplanetary Disks [PDF]
The Astrophysical JournalX-rays have significant impacts on cold, weakly ionized protoplanetary disks by increasing the ionization rate and driving chemical reactions. Stellar flares are explosions that emit intense X-rays and are the unique source of hard X-rays with an energy ...
Haruka Washinoue +2 more
doaj +9 more sources
A Statistical Study of Soft X-Ray Flares on Solar-type Stars [PDF]
The Astrophysical Journal, 2023 The statistical characteristics of stellar flares at optical bands have received extensive study, but they remain to be studied at soft X-ray bands, in particular for solar-type stars.
Z. H. Zhao +4 more
doaj +3 more sources
Multi-Observatory Research of Young Stellar Energetic Flares (MORYSEF): X-Ray-flare-related Phenomena and Multi-epoch Behavior [PDF]
The Astrophysical JournalThe most powerful stellar flares driven by magnetic energy occur during the early pre-main-sequence (PMS) phase. The Orion Nebula represents the nearest region populated by young stars, showing the greatest number of flares accessible to a single ...
Konstantin V. Getman +10 more
doaj +7 more sources
Delayed Development of Cool Plasmas in X-Ray Flares from the Young Sun-like Star κ 1 Ceti [PDF]
The Astrophysical Journal, 2023 The Neutron star Interior Composition Explorer (NICER) X-ray observatory observed two powerful X-ray flares equivalent to superflares from the nearby young solar-like star κ ^1 Ceti in 2019. NICER follows each flare from the onset through the early decay,
Kenji Hamaguchi +5 more
doaj +2 more sources
The Astrophysical Journal LettersRecent high spatial and temporal resolution extreme-ultraviolet (EUV) imaging observations have revealed that quasi-periodic pulsations (QPPs), a ubiquitous signature of impulsive energy release in solar and stellar flares, are also present in much ...
Daye Lim +7 more
doaj +2 more sources
X-Ray Analysis of Gamma-Ray Burst Flares and Underlying Afterglows: Insights into the Origin of Flares [PDF]
The Astrophysical JournalGamma-ray burst (GRB) X-ray light curves exhibit a variety of complex temporal structures, such as flares and plateaus. The origin of flares seen in many GRB early afterglows is still uncertain. Here we analyze a sample of 89 GRBs, 61 of them with flares,
H. Dereli-Bégué +4 more
doaj +2 more sources
Hard X-Ray Emission in AU Mic Flares: A Minor Contributor to Planetary Atmospheric Escape [PDF]
The Astrophysical JournalStellar flares are potent drivers of atmospheric evolution on orbiting exoplanets, primarily through extreme ultraviolet (EUV) and soft X-ray irradiation.
Yifan Hu +9 more
doaj +2 more sources
A Systematic Study of X-Ray Flares from Low-Mass Young Stellar Objects in the $\rho$ Ophiuchi Star-Forming Region with Chandra [PDF]
Publication of the Astronomical Society of Japan, 2003 We report on the results of a systematic study of X-ray flares from low-mass young stellar objects, using two deep exposure Chandra observations of the main region of the ρ Ophiuchi star-forming cloud.
Yohko Tsuboi +2 more
exaly +2 more sources