Global Non-Potential Magnetic Models of the Solar Corona During the March 2015 Eclipse

Yeates, Anthony R.; Amari, Tahar; Contopoulos, Ioannis; Feng, Xueshang; Mackay, Duncan H.; Mikić, Zoran; Wiegelmann, Thomas; Hutton, Joseph; Lowder, Christopher A.; Morgan, Huw; Petrie, Gordon; Rachmeler, Laurel A.; Upton, Lisa A.; Canou, Aurelien; Chopin, Pierre; Downs, Cooper; Druckmüller, Miloslav; Linker, Jon A.; Seaton, Daniel B.; Török, Tibor

doi:10.1007/s11214-018-0534-1

i

Global Non-Potential Magnetic Models of the Solar Corona During the March 2015 Eclipse

2018
By Yeates, Anthony R. ; Amari, Tahar ; Contopoulos, Ioannis ; ...

Select the Download button to view the document

Please click the download button to view the document.

Details

Journal Title:

Space Science Reviews
Personal Author:

Yeates, Anthony R. ; Amari, Tahar ; Contopoulos, Ioannis ; Feng, Xueshang ; Mackay, Duncan H. ; Mikić, Zoran ; Wiegelmann, Thomas ; Hutton, Joseph ; Lowder, Christopher A. ; Morgan, Huw ; Petrie, Gordon ; Rachmeler, Laurel A. ; Upton, Lisa A. ; Canou, Aurelien ; Chopin, Pierre ; Downs, Cooper ; Druckmüller, Miloslav ; Linker, Jon A. ; Seaton, Daniel B. ; Török, Tibor
NOAA Program & Office:

CIRES (Cooperative Institute for Research in Environmental Sciences)
Description:

Seven different models are applied to the same problem of simulating the Sun’s coronal magnetic field during the solar eclipse on 2015 March 20. All of the models are non-potential, allowing for free magnetic energy, but the associated electric currents are developed in significantly different ways. This is not a direct comparison of the coronal modelling techniques, in that the different models also use different photospheric boundary conditions, reflecting the range of approaches currently used in the community. Despite the significant differences, the results show broad agreement in the overall magnetic topology. Among those models with significant volume currents in much of the corona, there is general agreement that the ratio of total to potential magnetic energy should be approximately 1.4. However, there are significant differences in the electric current distributions; while static extrapolations are best able to reproduce active regions, they are unable to recover sheared magnetic fields in filament channels using currently available vector magnetogram data. By contrast, time-evolving simulations can recover the filament channel fields at the expense of not matching the observed vector magnetic fields within active regions. We suggest that, at present, the best approach may be a hybrid model using static extrapolations but with additional energization informed by simplified evolution models. This is demonstrated by one of the models.
Source:

Space Science Reviews, 214(5)
DOI:

https://doi.org/10.1007/s11214-018-0534-1
ISSN:

0038-6308 ; 1572-9672
Format:

pdf
Publisher:

Springer Science and Business Media LLC
Document Type:

Journal Article
License:

https://creativecommons.org/licenses/by/4.0
Rights Information:

CC BY
Compliance:

Library
Main Document Checksum:

urn:sha-512:579e7c6c783d44674f3b6e652a70af447d71f7490b560b4bf9e82586f8eae47651977a2e811f8512a817223a8032139d437f97e685769c7bb796394bf5e941d8
Download URL:

https://repository.library.noaa.gov/view/noaa/68173/noaa_68173_DS1.pdf
File Type:

[PDF - 8.50 MB ]

ON THIS PAGE

Details

The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners. As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.