کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
826357 907920 2013 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of projection effects on the observed differential rotation rate in the UV corona
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Influence of projection effects on the observed differential rotation rate in the UV corona
چکیده انگلیسی

Following previous investigations by Giordano and Mancuso [1] and Mancuso and Giordano [2] and [3] on the differential rotation of the solar corona as obtained through the analysis of the intensity time series of the O VI 1032 Å spectral line observed by the UVCS/SOHO telescope during solar cycle 23, we analysed the possible influence of projection effects of extended coronal structures on the observed differential rotation rate in the ultraviolet corona. Through a simple geometrical model, we found that, especially at higher latitudes, the differential rotation may be less rigid than observed, since features at higher latitudes could be actually linked to much lower coronal structures due to projection effects. At solar maximum, the latitudinal rigidity of the UV corona, with respect to the differential rotating photosphere, has thus to be considered as an upper limit of the possible rigidity. At solar minimum and near the equatorial region throughout the solar cycle, projection effects are negligible.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Advanced Research - Volume 4, Issue 3, May 2013, Pages 283–286
نویسندگان
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