题目：A new solar prominence catalogue with SOPRA

主讲：Nicolas Labrosse博士

时间：2011年11月1日(星期二) 上午 10:00-11:50

地点：学术报告厅

内容简介：I will present SOPRA (Solar Off-limb Prominence Reconstruction Algorithm), an algorithm which automatically detects prominences above the limb in EUV images taken in the He II channel at304 Aand subsequently reconstructs the structures to extract their morphological parameters. SOPRA determines the characteristics of radial intensity profiles outward from the limb and uses Support Vector Machines in order to classify them as belonging to prominence or other structures. Pixels detected as belonging to a prominence are then used as the starting point to reconstruct the whole object by morphological image processing techniques. The algorithm is applied to the entire SOHO/EIT data set and a catalogue of detected prominences is produced. We present the initial statistical analysis of this catalogue, and discuss its use for solar prominence research and for space weather monitoring.

报告人简介：Nicolas Labrosse is a Lecturer in Astronomy and Astrophysics at the University of Glasgow, Scotland. Nicolas obtained his PhD at the Institut d'Astrophysique Spatiale inOrsay,France, with a thesis on the modelling of the helium spectrum in solar prominences. He then moved toAberystwythUniversityinWales,UKto continue his research as a postdoctoral researcher in the Solar System Physics group. He joined theUniversityofGlasgowin 2007 as a Lecturer in the Astronomy & Astrophysics group. His research interests are in radiative transfer modelling and spectroscopy of the solar atmosphere, with a long-standing interest in prominences. He has led two international teams on this topic at the International Space Science Institute inBern,Switzerland. He is also interested in solar image processing.