What is moss?

Berger, T.E., DePontieu, B., Fletcher, L. , Schrijver, C.J., Tarbell, T.E. and Title, A.M. (1999) What is moss? Solar Physics, 190(1-2), pp. 409-418. (doi:10.1023/A:1005286503963)

Berger, T.E., DePontieu, B., Fletcher, L. , Schrijver, C.J., Tarbell, T.E. and Title, A.M. (1999) What is moss? Solar Physics, 190(1-2), pp. 409-418. (doi:10.1023/A:1005286503963)

Full text not currently available from Enlighten.

Abstract

TRACE observations of active regions show a peculiar extreme ultraviolet (EUV) emission over certain plage areas. Termed `moss' for its spongy, low-lying, appearance, observations and modeling imply that the phenomenon is caused by thermal conduction from 3-5 MKcoronal loops overlying the plage: moss is the upper transition region emission of hot coronal loops. The spongy appearance is due to the presence of chromospheric jets or `spicules' interspersed with the EUV emission elements. High cadence TRACE observations show that the moss EUV elements interact with the chromospheric jets on 10 s time scales. The location of EUV emission in the moss does not correlate well to the locations of underlying magnetic elements in the chromosphere and photosphere, implying a complex magnetic topology for coronal loop footpoint regions. We summarize here the key observations leading to these conclusions and discuss new implications for understanding the structuring of the outer solar atmosphere.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Fletcher, Professor Lyndsay
Authors: Berger, T.E., DePontieu, B., Fletcher, L., Schrijver, C.J., Tarbell, T.E., and Title, A.M.
Subjects:Q Science > QB Astronomy
Q Science > QC Physics
College/School:College of Science and Engineering > School of Physics and Astronomy
Research Group:Astronomy and Astrophysics
Journal Name:Solar Physics
Journal Abbr.:Sol. Phys.
Publisher:Springer Verlag
ISSN:0038-0938
ISSN (Online):1573-093X

University Staff: Request a correction | Enlighten Editors: Update this record