Results 11 to 20 of about 6,211,798 (244)
X-ray/H$\alpha$ scaling relationships in stellar flares [PDF]
Publications of the Astronomical Society of Japan, 2023 We report on the results of our simultaneous observations of three large stellar flares with soft X-rays (SXRs) and an H$\mathrm{\alpha}$ emission line from two binary systems of RS CVn type.
H. Kawai +7 more
semanticscholar +5 more sources
COMPARISON OF DAMPED OSCILLATIONS IN SOLAR AND STELLAR X-RAY FLARES [PDF]
Astrophysical Journal, 2016 We explore the similarity and difference of the quasi-periodic pulsations (QPPs) observed in the decay phase of solar and stellar flares at X-rays. We identified 42 solar flares with pronounced QPPs, observed with the Reuven Ramaty High-Energy Solar ...
V M Nakariakov
exaly +5 more sources
A survey of stellar X-ray flares from the XMM-Newton serendipitous source catalogue: HIPPARCOS-Tycho cool stars [PDF]
, 2015 Tables C.1 and C.2 are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/. Figures C.1 and C.2 are only available in electronic form via http://www.
J. Pye, S. Rosen, D. Fyfe, A. Schröder
semanticscholar +2 more sources
X-ray flares from the stellar tidal disruption by a candidate supermassive black hole binary [PDF]
Nature Communications, 2020 Optical transient surveys have led to the discovery of dozens of stellar tidal disruption events (TDEs) by massive black hole in the centers of galaxies.
X. Shu +10 more
semanticscholar +6 more sources
X-ray Flares from Postmerger Millisecond Pulsars [PDF]
Science, 2006 Recent observations support the suggestion that short-duration gamma-ray bursts are produced by compact star mergers. The x-ray flares discovered in two short gamma-ray bursts last much longer than the previously proposed postmerger energy-release time ...
Z. Dai +3 more
semanticscholar +2 more sources
Hard X-ray flares in IGR J08408-4503 unveil clumpy stellar winds [PDF]
Astronomy & Astrophysics, 2007 Context. A 1000-s flare from a new hard X-ray transient, IGR J08408-4503, was observed by INTEGRAL on May 15, 2006 during the real-time routine monitoring of IBIS/ISGRI images performed at the INTEGRAL Science Data Centre.
J. Leyder +4 more
semanticscholar +5 more sources
Living Reviews in Solar PhysicsMagnetic storms on stars manifest as remarkable, randomly occurring changes of the luminosity over durations that are tiny in comparison to the normal evolution of stars.
Adam F. Kowalski
doaj +2 more sources
X-Ray Flares in Orion Young Stars. II. Flares, Magnetospheres, and Protoplanetary Disks [PDF]
, 2008 We study the properties of powerful X-ray flares from 161 pre-main-sequence (PMS) stars observed with the Chandra X-ray Observatory in the Orion Nebula region.
K. Getman +5 more
semanticscholar +2 more sources
LEIA Discovery of the Longest-lasting and Most Energetic Stellar X-Ray Flare Ever Detected
The Astrophysical JournalThe Lobster Eye Imager for Astronomy (LEIA) detected a new X-ray transient on 2022 November 7, identified as a superflare event occurring on a nearby K-type giant star HD 251108. The flux increase was also detected in follow-up observations at X-ray, UV,
Xuan Mao +42 more
doaj +4 more sources
The Soft X-ray Lightcurves of Partially Eclipsed Stellar Flares [PDF]
Monthly Notices of the Royal Astronomical Society, 2011 Most stellar flares' soft X-ray light curves possess a 'typical' morphology, which consists of a rapid rise followed by a slow exponential decay. However, a study of 216 of the brightest flares on 161 pre-main-sequence stars, observed during the Chandra Orion Ultradeep Project (COUP), showed that many flare light curves depart from this typical ...
Johnstone, C. P. +3 more
openaire +4 more sources