What you can see through ha solar
filters
Active
regions are merely areas where
noticeable solar activity (i.e.: sunspot groups, ect.) is present. They
are areas on the sun where the local magnetic fields have organized to
some extent to produce sunspot activity or bright plage (or sometimes,
only a residual filament in the case of really old active regions).
With many sunspot groups, spicules are seen pointing almost radially
away from the direction of the nearest sunspot.
In sunspot groups, we see more
small filaments called fibrils or loops rather than spicules, as the
magnetic field is stronger and often more parallel to the surface
(except for the more vertical loops). Those spike-like features that do
occasionally appear briefly inside active regions are usually surges,
and are usually fairly temporary (the results of small solar flares).
Flares - Extremely bright moderate to large transient emission
feature lasting from a few minutes to over four hours. Flares are a
rapid and violent release of energy in the chromosphere due to extreme
magnetic field stress and can occasionally result in material leaving
the sun in the form of a Coronal Mass Ejection (CME). Flares are seen in
variety of wavelengths.
Plages - bright cloud-like
features found around sunspots that represent regions of higher
temperature and density within the chromosphere.
Surges - An ejection from
the Sun that takes place during a solar flare that ascend and descend in
a straight path.
Sprays - Extremely
explosive ejections that take place during a solar flare at high
velocities.
Sunspots - sit below the
Chromosphere and are best seen in white light. They are visible in
H-alpha, but often not as well as in off-band wavelengths, so
depending on the filter, they may not be easily seen.
Why Ha? |
The View |
What you see |
The Chromos |
Ha Emission |
Bandwidth |
Main Designs |
Ha Components |
Rear Filters |
The Etalon |
Front Filters |
Coronado filters |
DayStar Filters |
Solar Spectrum Filters
