Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.sao.ru/cats/~satr/RFSymp/abs/17_Korzhavin.pdf Дата изменения: Mon Oct 9 11:39:02 2006 Дата индексирования: Tue Oct 2 10:18:27 2012 Кодировка: Поисковые слова: md-11

ESTIMATIONS OF EFFECTIVE HEIGHT, SIZE AND BRIGHTNESS TEMPERATURE OF SOLAR CYCLOTRON SOURCES
A.N. Korzhavin, T.I. Kaltman Sp ecial Astrophysical Observatory of RAS, Saint-Petersburg, Russia arles@mail.ru The mo deling of microwave emission from a sp ot-asso ciated cyclotron source was done to refine the metho d of estimations of effective brightness temp erature, size and height ab ove photosphere in the pro cessing of RATAN-600 observations. The simple mo del of a source with a dip ole distribution of magnetic field and with a two-step transition region b etween the cold dense chromosphere and the hot corona was used. When a source approaches the limb the decrease of a source visible size in E-W direction takes place due to the pro jection effect, which causes the decrease of its effective size in pro cessing of a one-dimensional scan of RATAN-600. The subsequent Gauss-analysis would overestimate values of brightness temp eratures if necessary corrections were not done. The same pro jection effect leads to the fact, that the size of source observed in p olarized emission (Stokes parameter V) exceeds the size of the source in full intensity emission (Stokes parameter I) due to non circular distribution of p olarized emission. The metho d of estimates of the effective height of emission ab ove photosphere level by measurements of an emission centre of weight declination from a source geometrical centre at approaching to the limb was mo deled and presented. This work was supp orted by the RFBR grants 05-02-16228 and 06-02-17034a.