STATISTICS OF FLARES SWEEPING ACROSS SUNSPOTS
نویسندگان
چکیده
منابع مشابه
The Relative Positions of Sunspots and Flares
This paper describes a study of 11 flaring sunspots, for which on flare days the relative positions of flares andsunspots have been determined from data provided by the Climax and the Mount Wilson Observatories. For eachspot group all data, including the magnetic polarities and field strengths, were projected to the center of the sun'sdisc and combined.The maps show that flaring...
متن کاملStatistics of X-Ray Solar Flares
Previous studies of the statistical behavior of solar flare waiting times are based on the assumptions of Gaussian and Poisson statistics, subject to central limit theorem restrictions. In this study, the results of a rescaled range analysis on the waiting times for two hard x-ray solar flare data sets are presented. The Hurst scaling parameter, H, for both data sets is well above 0.5, clearly ...
متن کاملAutomated Prediction of Solar Flares Using Neural Networks and Sunspots Associations
An automated neural network-based system for predicting solar flares from their associated sunspots and simulated solar cycle is introduced. A sunspot is the cooler region of the Sun's photosphere which, thus, appears dark on the Sun's disc, and a solar flare is sudden, short lived, burst of energy on the Sun's surface, lasting from minutes to hours. The system explores the publicly available s...
متن کاملX-RAY FLARES OF EV Lac: STATISTICS, SPECTRA, AND DIAGNOSTICS
We study the spectral and temporal behavior of X-ray flares from the active M dwarf EV Lac in 200 ks of exposure with the Chandra/HETGS. We derive flare parameters by fitting an empirical function which characterizes the amplitude, shape, and scale. The flares range from very short (<1 ks) to long (∼104 s) duration events with a range of shapes and amplitudes for all durations. We extract spect...
متن کاملSegmenting “Flares” in Ultrasound Images Using Prior Statistics
The common method neonatologists use nowadays to determine White Matter Damage (leukomalacia) is by visual inspection of ultrasound images of the neonatal brain. A need for a (semi)computerized way of delineating the affected regions, in order to make quantitative measurements as an aid to the subjective diagnosis, is felt. The use of active contours for this purpose is a classical approach [1,...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2009
ISSN: 0004-637X,1538-4357
DOI: 10.1088/0004-637x/706/1/l17