首页|Validation of heliospheric modeling algorithms through pulsar observations II: Simulations with EUHFORIA

Validation of heliospheric modeling algorithms through pulsar observations II: Simulations with EUHFORIA

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  • Elsevier
In space weather studies and forecasting we employ magnetohydrodynamic (MHD) simulations which can provide rather accurate reconstruction of the solar wind dynamics and its evolution. However, all MHD simulations are restricted by the input data and the modelled solar wind characteristics need to be validated with different types of observations. That is very difficult, in particular for the solar wind characteristics close to the Sun, since the majority of in situ observations are taken in the vicinity of the Earth. This is why all alternative methods for estimation of solar wind plasma characteristics are very important. In this study we utilise low radio frequency observations of pulsars to probe the total electron content along the line of sight. For the first time, we compare density estimates from pulsars with predictions from the 3D MHD modelling code; the EUropean Heliospheric FORecasting Information Asset (EUHFORIA). We find a very good correlation for the solar wind density along a given line of sight obtained by EUHFORIA and pulsar observations. We demonstrate that pulsar observations can be very useful not only for the model validation but also for understanding its limitations.

Space weatherPulsarsSolar wind

G.M. Shaifullah、J. Magdalenic d.、C. Tiburzi、I. Jebaraj、E. Samara、P. Zucca

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Dipartimento di Fisica 'G. Occhialini', Universita di Milano-Bicocca, Piazza della Scienza 3, 20126 Milano, Italy||INFN, Sezione di Milano-Bicocca, Piazza della Scienza 3, 1-20126 Milano, Italy||INAF, Osservatorio Astronomico di Cagliari, Via della Scienza 5, 09047 Selargius, Italy

Center for mathematical Plasma Astrophysics, Department of Mathematics, KU Leuven, Celestijnenlaan 200B, 3001 Leuven, Belgium

INAF, Osservatorio Astronomico di Cagliari, Via della Scienza 5, 09047 Selargius, Italy

Solar-Terrestrial Centre of Excellence - SIDC, Royal Observatory of Belgium, Avenue Circulaire 3, 1180 Uccle, Belgium||Center for mathematical Plasma Astrophysics, Department of Mathematics, KU Leuven, Celestijnenlaan 200B, 3001 Leuven, Belgium

ASTRON - the Netherlands Institute for Radio Astronomy, Oude Hoogeveensedijk 4, 7991 PD Dwingeloo, the Netherlands

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2023

10.1016/j.asr.2022.07.003

Advances in space research: The official journal of the Committee on Space Research

Advances in space research: The official journal of the Committee on Space Research

EI
ISSN：0273-1177
年,卷(期)：2023.72(12)
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