Τίτλος:
A solar active region loop compared with a 2D MHD model
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
We analyzed a coronal loop observed with the Normal Incidence Spectrometer (NIS), which is part of the Coronal Diagnostic Spectrometer (CDS) on board the Solar and Heliospheric Observatory (SOHO). The measured Doppler shifts and proper motions along the selected loop strongly indicate unidirectional flows. Analysing the Emission Measure Curves of the observed spectral lines, we estimated that the temperature along the loop was about 380 000 K. We adapted a solution of the ideal MHD steady equations to our set of measurements. The derived energy balance along the loop, as well as the advantages/disadvantages of this MHD model for understanding the characteristics of solar coronal loops are discussed. © ESO 2005.
Συγγραφείς:
Gontikakis, C.
Petrie, G.J.D.
Dara, H.C.
Tsinganos, K.
Περιοδικό:
Chinese Astronomy and Astrophysics
Λέξεις-κλειδιά:
Doppler effect; Heating; Magnetic fields; Magnetohydrodynamics; Spectrometers; Sun; Ultraviolet radiation, Solar active region loop; Sun: corona; Sun: magnetic fields; Sun: UV radiation, Solar energy
DOI:
10.1051/0004-6361:20041268
