|On January 07, 2008, a brand new camera from the Uccle observatoria catched the Sun in the H-alpha wavelength.|
|posted: Mar 17, 2008|
A new camera was installed on the equatorial table of the solar dome in Uccle. A few full disk pictures were taking
in the H-alpha line.
For the people interested: the camera is a Kodak KAI-4021 interline sensor. The interline technology permits the camera to operate shutterless.
|The picture is a detail of a full disk image. The bright features are plages: a cloud-like feature with a higher temperature compared with its surroundings. The dark line is a prominence: a cloud of plasma floating over the surface of the sun. It is black since it blocks the radiation from the solar surface below it. Click for the full solar disk picture.||The tiny white spot in the photo is the chromospheric signature of an H-alpha micro-flare: a local and temporary increase of emitted energy in the electromagnetic spectrum, here at 656.281 nm. At that particular place on the solar disk, the temperature increased suddenly. The plasma located at the place of initiation, emits during the flare in a higher energy range and becomes white/invisible in the picture. Since the white spot is small we speak about a micro-flare.|