What is a supernova?
An exploding star that releases a large amount of energy. It is manifested by a notable increase in the intensity of the brightness or by its appearance at a point in apparently empty space.
A star explodes because the fuel that generates energy in the core of the star runs out and, therefore, the radiation pressure that prevents the collapse of the star runs out, the star yields to gravity, giving rise to stellar debris that They are not stable in the face of the gravity that does not stop. In the end everything is a question of fuel, without it the star cannot continue to shine.
Type I: They are those that do not show emission lines typical of hydrogen during the evolution of its brightness.
- Type Ia: they show a deep absorption line for silicon, (6200Å/615nm). When its brightness approaches its maximum. Later, its spectrum becomes dominated by iron and cobalt lines.
-Type Ib: they do not show the SiII line, but they do show other lines of neutral helium (He) that do not appear, or are very faint, in Ia supernovae. Later, the emission lines of a multitude of elements of intermediate mass, such as oxygen or calcium, become very visible.