Hydrodynamic modeling of an X-ray flare on Proxima Centauri observed by the Einstein telescope

Journal Article · Sun May 01 00:00:00 EDT 1988 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/166288· OSTI ID:6935394

Reale, F; Peres, G; Serio, S; Rosner, R; Schmitt, J H.M.M.

Hydrodynamic numerical calculations of a flare which occurred on Proxima Centauri and was observed by the Einstein satellite on August 20, 1980 at 12:50 UT are presented. The highlights of the hydrodynamic code are reviewed, and the physical and geometrical parameters necessary for the calculations are derived and compared with observations. The results are consistent with the stellar flare being caused by the rapid dissipation of 5.9 x 10 to the 31st ergs, within a magnetic loop structure whose semilength is 7 x 10 to the 9th cm and cross-sectional radius is 7.3 x 10 to the 8th cm. The results provide evidence that flares on late-type stars can be described by a hydrodynamic model with a relatively simple geometry, similar to solar compact flares. 39 references.

• Research Organization: Palermo, Osservatorio Astronomico (Italy); Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (USA); Max-Planck-Institut fuer extraterrestrische Physik, Garching (Germany, F.R.)
• OSTI ID: 6935394
• Journal Information: Astrophys. J.; (United States), Vol. 328
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
STELLAR FLARES
HYDRODYNAMIC MODEL
COMPARATIVE EVALUATIONS
COSMIC X-RAY SOURCES
DATA PROCESSING
ENERGY LOSSES
MAGNETIC FIELD CONFIGURATIONS
MAGNETIC FLUX
TELESCOPES
COSMIC RAY SOURCES
LOSSES
MATHEMATICAL MODELS
PARTICLE MODELS
PROCESSING
STATISTICAL MODELS
STELLAR ACTIVITY
THERMODYNAMIC MODEL
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources