The mechanism behind the first type is not completely understood, but it is characterized by a lack of hydrogen spectra lines and it expands faster and with greater brightness than the second type.
The mechanism behind the first type is not completely understood, but it is characterized by a lack of hydrogen spectra lines and it expands faster and with greater brightness than the second type. Much of the released energy is generated by the decay of nickel-56, and in the classic model it is caused by external gaseous material rebounding off a fused-out iron core. FTP, what is the term for the death explosion of a massive star, resulting in a sharp increase in brightness followed by a gradual fading?
The mechanism behind the first type is not completely understood, but it is characterized by a lack of hydrogen spectra lines and it expands faster and with greater brightness than the second type.
{Supernova}