Dear all,
I'd like to draw your attention to a paper recently published in A&A that may be of interest to you.
http://www.aanda.org/articles/aa/abs/2014/03/aa22572-13/aa22572-13.html http://arxiv.org/abs/1312.3792
It describes slow (periods of several hours) pulsations discovered in coronal loops. We present a few typical events plus a statistical analysis of the main properties of the hundreds of events detected during solar cycle 23. They went mostly unnoticed up to now (probably because their detection requires the systematic analysis of a large quantity of data), but they seem to be common in coronal loops. The cause for these pulsations is still unclear, but they are likely related to the way the loops are heated.
We'd be happy to discuss any suggestion you may have regarding the physical nature of these new phenomena.
Share & enjoy,
Frédéric Auchère