facula

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facula

[′fak·yə·lə]
(astronomy)
Any of the large patches of bright material forming a veined network in the vicinity of sunspots; faculae appear to be more permanent than sunspots and are probably due to elevated clouds of luminous gas.
References in periodicals archive ?
Others have reported that facular contrast continues to increase towards the limb (e.
Despite the wide acceptance of Spruit's "hot wall" model of facular emissivity [62] numerous problems exist with such approaches.
Second, a discussion of facular emissivity often focuses on local thermal equilibrium (LTE) arguments (e.

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