Inference of heating properties from "hot" non-flaring plasmas in active region cores i. single nanoflares
File(s)
Accepted version
Author(s)
Barnes, WT
Cargill, PJ
Bradshaw, SJ
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.
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.
Date Issued
2016-09-20
Date Acceptance
2016-07-12
Citation
Astrophysical Journal, 2016, 829 (1), pp.31-31
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
Subjects
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