Open AccessWhat if we had a magnetograph at Lagrangian L5?
Author(s) -
Pevtsov Alexei A.,
Bertello Luca,
MacNeice Peter,
Petrie Gordon
Publication year - 2016
Publication title -
space weather
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.254
H-Index - 56
ISSN - 1542-7390
DOI - 10.1002/2016sw001471
Subject(s) - space weather , lagrangian point , meteorology , lagrangian , point (geometry) , solar wind , physics , space (punctuation) , flux (metallurgy) , field (mathematics) , remote sensing , topology (electrical circuits) , computer science , magnetic field , environmental science , geology , mathematics , astronomy , theoretical physics , geometry , materials science , quantum mechanics , combinatorics , pure mathematics , metallurgy , operating system
Synoptic Carrington charts of magnetic field are routinely used as an input for modelings of solar wind and other aspects of space weather forecast. However, these maps are constructed using only the observations from the solar hemisphere facing Earth. The evolution of magnetic flux on the “farside” of the Sun, which may affect the topology of coronal field in the “nearside,” is largely ignored. It is commonly accepted that placing a magnetograph in Lagrangian L5 point would improve the space weather forecast. However, the quantitative estimates of anticipated improvements have been lacking. We use longitudinal magnetograms from the Synoptic Optical Long‐term Investigations of the Sun (SOLIS) to investigate how adding data from L5 point would affect the outcome of two major models used in space weather forecast.