Report
Measuring the F-corona intensity through time correlation of total and polarized visible light images
| العنوان: | Measuring the F-corona intensity through time correlation of total and polarized visible light images |
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| المؤلفون: | Burtovoi, A., Naletto, G., Dolei, S., Spadaro, D., Romoli, M., Landini, F., De Leo, Y. |
| المصدر: | A&A 659, A50 (2022) |
| سنة النشر: | 2021 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Solar and Stellar Astrophysics |
| الوصف: | We present a new correlation method for deriving the F-corona intensity distribution, which is based on the analysis of the evolution of the total and polarized visible light (VL) images. We studied the one-month variation profiles of the total and polarized brightness acquired with Large Angle Spectrometric COronagraph (LASCO-C2) and found that in some regions they are highly correlated. Assuming that the F-corona does not vary significantly on a timescale of one month, we estimated its intensity in the high-correlation regions and reconstructed the corresponding intensity maps both during the solar-minimum and solar-maximum periods. Systematic uncertainties were estimated by performing dedicated simulations. We compared the resulting F-corona images with those determined using the inversion technique and found that the correlation method provides a smoother intensity distribution. We also obtained that the F-corona images calculated for consecutive months show no significant variation. Finally, we note that this method can be applied to the future high-cadence VL observations carried out with the Metis/Solar Orbiter coronagraph. Comment: 16 pages, 21 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1051/0004-6361/202141414 |
| URL الوصول: | http://arxiv.org/abs/2112.11930 |
| رقم الانضمام: | edsarx.2112.11930 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1051/0004-6361/202141414 |
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