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Hello everyone
I have long been interested in eclipses of the Moon, and now in particular in the brightness of the Moon in penumbra. Old observations of this phenomenon indicate a greater brightness of the Moon in penumbra than expected. Astronomer Link attributed this excess light to the luminescence of the lunar soil caused by the X-ray and UV radiation emitted by the solar corona and chromosphe. Unfortunately, I cannot find any recent articles, or chapters in any books, that deal with this subject? It seems that this has been abandoned for several decades. Perhaps everything has already been explained?
That is why I would ask for help. Could someone give me a bibliographic indication, or even a contact to people who might be familiar with this lunar problem?
Thank youThe question sparked my interest. The old eclipse work seems to date from the 1960’s onwards. Modern work on the fluorescence of the Moon seems concerned more with its mineralogy and not with the solar aspect.
Engineer Robert, thank you for your consideration of my request. Yes, indeed the long interval marked by many studies (theoretical and experimental) of lunar mineralogy, but without any reference to the phenomenon I have recalled, raises uncertainty in my simple studies of lunar eclipse photometry. I have photometric observations of eclipses for more than an entire solar cycle, and it seems very strange that such a conspicuous phenomenon does not generate interest.
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