Hot explosions in the cool atmosphere of the Sun
| Autor: | Mats Carlsson, Paul Boerner, B. De Pontieu, Katharine K. Reeves, Juan Martinez-Sykora, Werner Curdt, Sean McKillop, Lucia Kleint, T. D. Tarbell, Hui Tian, Davina Innes, Jean-Pierre Wuelser, Paola Testa, A. M. Title, Charles C. Kankelborg, S. Jaeggli, Hardi Peter, Steven H. Saar, James R. Lemen, Neal E. Hurlburt, Viggo Hansteen, L. Golub, Donald Schmit |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Physics
Photosphere Multidisciplinary Astronomy FOS: Physical sciences Magnetic reconnection Astrophysics Corona Coronal radiative losses Nanoflares Atmosphere Astrophysics - Solar and Stellar Astrophysics 13. Climate action Physics::Space Physics Energy transformation Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Chromosphere Solar and Stellar Astrophysics (astro-ph.SR) |
| Zdroj: | Science |
| ISSN: | 0036-8075 |
| DOI: | 10.1126/science.1255726 |
| Popis: | The solar atmosphere was traditionally represented with a simple one-dimensional model. Over the past few decades, this paradigm shifted for the chromosphere and corona that constitute the outer atmosphere, which is now considered a dynamic structured envelope. Recent observations by IRIS (Interface Region Imaging Spectrograph) reveal that it is difficult to determine what is up and down even in the cool 6000-K photosphere just above the solar surface: this region hosts pockets of hot plasma transiently heated to almost 100,000 K. The energy to heat and accelerate the plasma requires a considerable fraction of the energy from flares, the largest solar disruptions. These IRIS observations not only confirm that the photosphere is more complex than conventionally thought, but also provide insight into the energy conversion in the process of magnetic reconnection. Comment: published in Science 346, 1255726 (2014), 30 pages, 13 figures; for associated movie, see http://www2.mps.mpg.de/data/outgoing/peter/papers/2014-iris-eb/fig1-movie.mov |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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