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What can We Learn from X-ray Observations of Stellar Flares?

Physica Scripta, 1998
It is argued that x-ray observations of stellar flares are very helpful for understanding the physics of solar flares. To achieve this aim, further high-quality observations of stellar flares are urgently needed.
J Jakimiec
exaly   +2 more sources

X-Ray Flares and Variability of Young Stellar Objects

1996
The most well-known “Young Stellar Objects” are the T Tauri stars, I.E., young, solar-type stars, first detected in X-rays by Einstein. With ROSAT and ASCA, the family of X-ray emitting young stars has been extended to protostars. X-ray emission is only related to surface magnetic phenomena, independently of the amount of circumstellar material ...
Thierry Montmerle, Sophie Casanova
openaire   +1 more source

Charge transfer X‐rays in solar and stellar flares

Astronomische Nachrichten, 2012
AbstractMost of the energy in a solar flare, and presumably a stellar flare as well, takes the form of a power law of energetic particles. The energetic electrons produce a bremsstrahlung continuum, while the most energetic nuclei produce gamma‐rays. Nuclei around 1 MeV/AMU can produce X‐rays during and after charge transfer with neutrals.
openaire   +1 more source

Frequency distribution of x-ray flares for young stellar objects in the region of ρ Oph

Astrophysics, 2012
Methods for determining the frequency distribution function of optical flares have been developed and successfully applied in statistical studies of flare stars. X-ray observations of flare stars provide a basis for extending the use of these methods to statistical studies of X-ray flares of young stellar objects. This article gives a brief description
A A Akopian
exaly   +2 more sources

Fast transient X-rays and gamma ray bursts—are they stellar flares?

Advances in Space Research, 1990
Short period transient X-ray emissions (FTX) have been observed from several sources in the sky and the largest single group of objects identified with such sources are active stars - flare stars and RS CVn binaries. We study the number, source and flux distribution of the fast transient X-ray sources and show that all the FTX emission can be treated ...
A.R. Rao, M.N. Vahia
openaire   +1 more source

X-ray transients and flares from active stellar systems

2008
Many X-ray flares detected to date from active cool stars were initially discovered as fast (≲ 3 hour) transients1,2,3. A survey of the HEAO A-1 Sky Survey Experiment 0.5–20 keV data for fast transients confirms the tendency for a significant fraction of such events to be associated with active stellar systems.
Carol Ambruster, Kent S. Wood
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X-ray observations of stellar coronae and flares with BeppoSAX

Disponibile sul CD-ROM allegato al volume, directory X-ray_CD/Posters/, file rpallavicini ...
Pallavicini, R.   +4 more
openaire   +1 more source

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