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Inference of heating properties from "hot" non-flaring plasmas in active region cores i. single nanoflares
File | Description | Size | Format | |
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hot_non_flaring_plasma1_accepted.pdf | Accepted version | 686.09 kB | Adobe PDF | View/Open |
Title: | Inference of heating properties from "hot" non-flaring plasmas in active region cores i. single nanoflares |
Authors: | Barnes, WT Cargill, PJ Bradshaw, SJ |
Item Type: | Journal Article |
Abstract: | The properties expected of “hot” non-flaring plasmas due to nanoflare heating in active regions are investigated using hydrodynamic modeling tools, including a two-fluid development of the EBTEL code. Here we study a single nanoflare and show that while simple models predict an emission measure distribution extending well above 10 MK that is consistent with cooling by thermal conduction, many other effects are likely to limit the existence and detectability of such plasmas. These include: differential heating between electrons and ions, ionization non-equilibrium and, for short nanoflares, the time taken for the coronal density to increase. The most useful temperature range to look for this plasma, often called the “smoking gun” of nanoflare heating, lies between 106.6 and 107 K. Signatures of the actual heating may be detectable in some instances. |
Issue Date: | 20-Sep-2016 |
Date of Acceptance: | 12-Jul-2016 |
URI: | http://hdl.handle.net/10044/1/37480 |
DOI: | https://dx.doi.org/10.3847/0004-637X/829/1/31 |
ISSN: | 1538-4357 |
Publisher: | American Astronomical Society |
Start Page: | 31 |
End Page: | 31 |
Journal / Book Title: | Astrophysical Journal |
Volume: | 829 |
Issue: | 1 |
Copyright Statement: | © 2016. The American Astronomical Society. All rights reserved |
Keywords: | Science & Technology Physical Sciences Astronomy & Astrophysics hydrodynamics plasmas Sun: corona EMISSION MEASURE DISTRIBUTIONS SOLAR CORONAL LOOPS X-RAY OBSERVATIONS TIME-DEPENDENCE HINODE TRANSPORT TELESCOPE DENSITY SPHINX XRT Astronomical And Space Sciences Organic Chemistry Physical Chemistry (Incl. Structural) |
Publication Status: | Published |
Appears in Collections: | Space and Atmospheric Physics Physics Faculty of Natural Sciences |