Sensitivity of solar wind mass flux to coronal temperature
| Autor: | Laura Bercic, Daniel N. Baker, Lorenzo Matteini, Christopher J. Owen, David Stansby, Samuel T. Badman, R. French |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
Mass flux 010504 meteorology & atmospheric sciences Astrophysics::High Energy Astrophysical Phenomena Coronal hole FOS: Physical sciences Astronomy and Astrophysics Astrophysics 01 natural sciences Space Physics (physics.space-ph) Solar wind Astrophysics - Solar and Stellar Astrophysics Physics - Space Physics 13. Climate action Space and Planetary Science Direct test Coronal plane 0103 physical sciences Physics::Space Physics Astrophysics::Solar and Stellar Astrophysics Sensitivity (control systems) 010303 astronomy & astrophysics Solar and Stellar Astrophysics (astro-ph.SR) 0105 earth and related environmental sciences |
| Popis: | Solar wind models predict that the mass flux carried away from the Sun in the solar wind should be extremely sensitive to the temperature in the corona, where the solar wind is accelerated. We perform a direct test of this prediction in coronal holes and active regions, using a combination of in-situ and remote sensing observations. For coronal holes, a 50% increase in temperature from 0.8 MK to 1.2 MK is associated with a tripling of the coronal mass flux. At temperatures over 2 MK, within active regions, this trend is maintained, with a four-fold increase in temperature corresponding to a 200-fold increase in coronal mass flux. Accepted for publication in Astronomy & Astrophysics |
| Databáze: | OpenAIRE |
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