Open Access

This article has an erratum: [erratum]

Fig. 1.


Relationship between optical thickness and logarithmic spectral gradient for a set of isothermal prominence models. The solid red line shows the simple relationship as defined by Eq. (4). The dashed-blue line shows τ = 1.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.