Exploring the Asymmetry of the Solar Corona Electron Density with Very Long Baseline Interferometry
| Autor: | Alexey Melnikov, S. Kurdubov, Dan Aksim, Dmitry Pavlov |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Physics
Geomagnetic storm Electron density 010504 meteorology & atmospheric sciences media_common.quotation_subject FOS: Physical sciences Astronomy and Astrophysics Plasma Solar physics 01 natural sciences Asymmetry Corona Computational physics Solar wind Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science 0103 physical sciences Very-long-baseline interferometry Physics::Space Physics Astrophysics::Solar and Stellar Astrophysics 010303 astronomy & astrophysics Solar and Stellar Astrophysics (astro-ph.SR) 0105 earth and related environmental sciences media_common |
| Popis: | The Sun's corona has interested researchers for multiple reasons, including the search for solution for the famous coronal heating problem and a purely practical consideration of predicting geomagnetic storms on Earth. There exist numerous different theories regarding the solar corona; therefore, it is important to be able to perform comparative analysis and validation of those theories. One way that could help us move towards the answers to those problems is the search for observational methods that could obtain information about the physical properties of the solar corona and provide means for comparing different solar corona models. In this work we present evidence that VLBI observations are, in certain conditions, sensitive to the electron density of the solar corona and are able to distinguish between different electron density models, which makes the technique of VLBI valuable for solar corona investigations. Recent works on the subject used a symmetric power-law model of the electron density in solar plasma; in this work, an improvement is proposed based on a 3D numerical model. Accepted for publication in the Astrophysical Journal |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|