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| Paper: |
Observational Signatures of the Small-Scale Dynamo in the Quiet Sun |
| Volume: |
455, 4th Hinode Science Meeting: Unsolved Problems and Recent Insights |
| Page: |
17 |
| Authors: |
Abramenko, V.; Yurchyshyn, V.; Goode, P. R. |
| Abstract: |
The generation and diffusion of the magnetic
field on the Sun is a key mechanism responsible for solar activity on
all spatial and temporal scales—from the solar cycle down to the
evolution of small-scale magnetic elements in the quiet Sun. The solar
dynamo operates as a non-linear dynamical process and is thought to be
manifest in two types: as a global dynamo responsible for the solar
cycle periodicity, and as a small-scale turbulent dynamo responsible
for the formation of the magnetic carpet in the quiet Sun. Numerous
MHD simulations of solar turbulence did not yet reach a consensus as
to the existence of a turbulent dynamo on the Sun. At the same time,
high-resolution observations of the quiet Sun from Hinode instruments
suggest possibilities for the turbulent dynamo. Analysis of
characteristics of turbulence derived from observations would be
beneficial in tackling the problem. We analyze magnetic and velocity
energy spectra as derived from Hinode/SOT, SOHO/MDI, SDO/HMI and the
New Solar Telescope (NST) of Big Bear Solar Observatory (BBSO) to
explore the possibilities for the small-scale turbulent dynamo in the
quiet Sun. |
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