Tomography of the Solar Corona with the Metis Coronagraph I: Predictive Simulations with Visible-Light Images
Tomography of the Solar Corona with the Metis Coronagraph I: Predictive Simulations with Visible-Light Images
复制标题
使用 Metis Coronagraph I 进行日冕层析成像:使用可见光图像进行预测模拟
DOI:
10.1007/s11207-022-02047-9
复制
发表时间:
2022
期刊:
影响因子:
2.8
通讯作者:
Manchester, Ward B.
中科院分区:
文献类型:
--
作者:
Vásquez, Alberto M.;Nuevo, Federico A.;Frassati, Federica;Bemporad, Alessandro;Frazin, Richard A.;Romoli, Marco;Sachdeva, Nishtha;Manchester, Ward B.
TheSolar Orbiter/Metiscoronagraph records full-Sun visible-light polarized brightness (-) images of the solar corona. This work investigates the utility of a synoptic observational program ofMetisfor tomographic reconstruction of the three-dimensional (3D) distribution of the electron density of the global solar corona. During its lifetime, the mission’s distance to the Sun will range over, while its solar latitude will span. The limitations that this orbital complexity poses on tomographic reconstructions are explored in this work. Using the predicted orbital information ofSolar Orbiterand 3D-MHD simulations of the solar corona using the Alfvén Wave Solar atmosphere Model (AWSoM), time series of syntheticMetis-images were computed and used as data to attempt tomographic reconstruction of the model. These numerical experiments were implemented for solar-minimum and solar-maximum conditions. In both cases, images were synthesized from three orbital segments, corresponding to extreme geometrical conditions of observation byMetis: aphelion, perihelion, and maximum solar latitude. The range of heights that can be reconstructed, the required data-gathering period, and the accuracy of the reconstruction, are discussed in detail for each case. As a general conclusion, aMetissynoptic observational program with a cadence of at least four images day−1provides enough data to attempt tomographic reconstructions during the whole lifetime of the mission, a requirement well within the two- to three-hour cadence of the current synoptic program. This program will allow implementation of tomography experimenting with different values for the cadence of the time series of images used to feed reconstructions. Its cadence will also provide continuous opportunities to select images avoiding highly dynamic events, which compromise the accuracy of tomographic reconstructions.
登录
查看更多内容
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
M. Minnaert
通讯作者:
M. Minnaert
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
Y. Neuzillet
通讯作者:
Y. Neuzillet
影响因子:
6.5
作者:
A. Bemporad;S. Giordano;L. Zangrilli;F. Frassati
通讯作者:
F. Frassati
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
J. Woltjer
通讯作者:
J. Woltjer
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
Morimoto;Hiroaki;Masashi Misawa
通讯作者:
Masashi Misawa