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Title: Observations and Numerical Models of Solar Coronal Heating Associated with Spicules

Abstract

Spicules have been proposed as significant contributors to the mass and energy balance of the corona. While previous observations have provided a glimpse of short-lived transient brightenings in the corona that are associated with spicules, these observations have been contested and are the subject of a vigorous debate both on the modeling and the observational side. Therefore, it remains unclear whether plasma is heated to coronal temperatures in association with spicules. We use high-resolution observations of the chromosphere and transition region (TR) with the Interface Region Imaging Spectrograph and of the corona with the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory to show evidence of the formation of coronal structures associated with spicular mass ejections and heating of plasma to TR and coronal temperatures. Our observations suggest that a significant fraction of the highly dynamic loop fan environment associated with plage regions may be the result of the formation of such new coronal strands, a process that previously had been interpreted as the propagation of transient propagating coronal disturbances. Our observations are supported by 2.5D radiative MHD simulations that show heating to coronal temperatures in association with spicules. Our results suggest that heating and strong flows play anmore » important role in maintaining the substructure of loop fans, in addition to the waves that permeate this low coronal environment.« less

Authors:
;  [1];  [2];  [3]
  1. Lockheed Martin Solar and Astrophysics Laboratory, 3251 Hanover Street, Org. A021S, Building 252, Palo Alto, CA 94304 (United States)
  2. School of Mathematics and Statistics, University of St Andrews, St Andrews, Fife KY16 9SS (United Kingdom)
  3. High Altitude Observatory, National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307 (United States)
Publication Date:
OSTI Identifier:
22654408
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal Letters
Additional Journal Information:
Journal Volume: 845; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 2041-8205
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CHROMOSPHERE; DISTURBANCES; ENERGY BALANCE; HEATING; INTERFACES; MAGNETIC FIELDS; MAGNETOHYDRODYNAMICS; MASS; PLASMA; RESOLUTION; SIMULATION; SOLAR PROMINENCES; SUN

Citation Formats

Pontieu, B. De, Martinez-Sykora, J., Moortel, I. De, and McIntosh, S. W. Observations and Numerical Models of Solar Coronal Heating Associated with Spicules. United States: N. p., 2017. Web. doi:10.3847/2041-8213/AA7FB4.
Pontieu, B. De, Martinez-Sykora, J., Moortel, I. De, & McIntosh, S. W. Observations and Numerical Models of Solar Coronal Heating Associated with Spicules. United States. doi:10.3847/2041-8213/AA7FB4.
Pontieu, B. De, Martinez-Sykora, J., Moortel, I. De, and McIntosh, S. W. Sun . "Observations and Numerical Models of Solar Coronal Heating Associated with Spicules". United States. doi:10.3847/2041-8213/AA7FB4.
@article{osti_22654408,
title = {Observations and Numerical Models of Solar Coronal Heating Associated with Spicules},
author = {Pontieu, B. De and Martinez-Sykora, J. and Moortel, I. De and McIntosh, S. W.},
abstractNote = {Spicules have been proposed as significant contributors to the mass and energy balance of the corona. While previous observations have provided a glimpse of short-lived transient brightenings in the corona that are associated with spicules, these observations have been contested and are the subject of a vigorous debate both on the modeling and the observational side. Therefore, it remains unclear whether plasma is heated to coronal temperatures in association with spicules. We use high-resolution observations of the chromosphere and transition region (TR) with the Interface Region Imaging Spectrograph and of the corona with the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory to show evidence of the formation of coronal structures associated with spicular mass ejections and heating of plasma to TR and coronal temperatures. Our observations suggest that a significant fraction of the highly dynamic loop fan environment associated with plage regions may be the result of the formation of such new coronal strands, a process that previously had been interpreted as the propagation of transient propagating coronal disturbances. Our observations are supported by 2.5D radiative MHD simulations that show heating to coronal temperatures in association with spicules. Our results suggest that heating and strong flows play an important role in maintaining the substructure of loop fans, in addition to the waves that permeate this low coronal environment.},
doi = {10.3847/2041-8213/AA7FB4},
journal = {Astrophysical Journal Letters},
issn = {2041-8205},
number = 2,
volume = 845,
place = {United States},
year = {2017},
month = {8}
}