Impact of Type II Spicules in the Corona: Simulations and Synthetic Observables
| Autor: | Bart De Pontieu, Viggo Hansteen, Juan Martinez-Sykora, Ineke De Moortel, Mats Carlsson |
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| Přispěvatelé: | European Research Council, Science & Technology Facilities Council, University of St Andrews. Applied Mathematics, University of St Andrews. School of Mathematics and Statistics |
| Rok vydání: | 2018 |
| Předmět: |
atmosphere [Sun]
Magnetohydrodynamics (MHD) 010504 meteorology & atmospheric sciences corona [Sun] Center of excellence NDAS Library science FOS: Physical sciences 01 natural sciences 0103 physical sciences media_common.cataloged_instance Radiative transfer QB Astronomy European union 010303 astronomy & astrophysics QC Solar and Stellar Astrophysics (astro-ph.SR) 0105 earth and related environmental sciences media_common QB Physics numerical [Methods] European research Astronomy and Astrophysics QC Physics Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science Research council |
| ISSN: | 0004-637X |
| DOI: | 10.48550/arxiv.1805.06475 |
| Popis: | The role of type II spicules in the corona has been a much debated topic in recent years. This paper aims to shed light on the impact of type II spicules in the corona using novel 2.5D radiative MHD simulations including ion-neutral interaction effects with the Bifrost code. We find that the formation of simulated type II spicules, driven by the release of magnetic tension, impacts the corona in various manners. Associated with the formation of spicules, the corona exhibits 1) magneto-acoustic shocks and flows which supply mass to coronal loops, and 2) transversal magnetic waves and electric currents that propagate at Alfv\'en speeds. The transversal waves and electric currents, generated by the spicule's driver and lasting for many minutes, are dissipated and heat the associated loop. These complex interactions in the corona can be connected with blue shifted secondary components in coronal spectral lines (Red-Blue asymmetries) observed with Hinode/EIS and SOHO/SUMER, as well as the EUV counterpart of type II spicules and propagating coronal disturbances (PCDs) observed with the 171~\AA\ and 193~\AA\ SDO/AIA channels. Comment: 9 figures, 13 pages, accepted to be published in ApJ |
| Databáze: | OpenAIRE |
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