MASS FLOWS IN CORONAL LOOPS

Authors
Citation
Sk. Antiochos, MASS FLOWS IN CORONAL LOOPS, Space science reviews, 70(1-2), 1994, pp. 143-148
Citations number
15
Categorie Soggetti
Astronomy & Astrophysics
Journal title
ISSN journal
00386308
Volume
70
Issue
1-2
Year of publication
1994
Pages
143 - 148
Database
ISI
SICI code
0038-6308(1994)70:1-2<143:MFICL>2.0.ZU;2-H
Abstract
Although static loop models are often used to describe the structure o f coronal loops, it is evident on both observational and theoretical g rounds that mass motions play a crucial role in the physics of the cor ona and transition region. First we review the observations of emissio n-line broadening and wavelength shifts, which imply the presence of r andom motions and systematic downflows in coronal loops. Some discrepa ncies in the observations are discussed. It is argued that velocities due to gas pressure gradients are the most likely explanation for the observed flows. A number of models that have been proposed for these m otions are reviewed. The implications of the various models on observa tions of the corona and transition region by SOHO are discussed.