This HOP aims to understand the origin of activities of light bridges, such as long-lasting plasma ejection (Shimizu 2007), super-sonic down flow (Louis 2009).
These activities may be associated with magnetic field. Although magnetic reconnection is specially considered as the driver of these activities, it is not conclusive because of few studies focusing to the high temporal evolution of magnetic fields and chromospheric counterparts in light bridges. Especially, velocity measurements in the chromosphere are important for justifying magnetic reconnection.
Although there are many SOT observations of light bridges, there are only a few SP datasets that provide the evolution of magnetic fields in the cadence less than a few minutes. Furthermore, there are a very limited number of IRIS observations for light bridges simultanetously performd with SP. Especially, the light bridge with long-lasting plasma ejections has not yet been observed by IRIS and SP at the same time.
This proposal is to request the Hinode and IRIS teams to acquire more examples of light bridges. Note that this work is a part of the proposer's Master thesis studies. |
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