Enhance HII regions in Spiral galaxies

Sun, 12 Apr 2015 19:59:11 +0000

Galaxies are among the most fascinating objects to be photographed, their light emission comes mainly from the stars so it has a continuum spectrum.

For this reason, the primary capture method with CCD cameras is through RGB broadbandfilters ot get true-color images.

Some spiral galaxies, however, are very rich in HII regions, areas in which star formation is particularly active, and emit mainly hydrogen spectrum whose main emission line in the visible, called Hα (H alpha), is in red at 656.28 nm.

H-Alpha on L'Arciere Celeste

Enhance HII regions in Spiral galaxies