Progenitor star Supernova Cause of collapse Remnant approximate Type initial mass Electron capture in Neutron a degenerate 8–10 Faint II-P star O+Ne+Mg core Neutron 10–25 II-P star Black hole after fallback 25–40 with of low or solar Normal II-P material metallicity onto an initial neutron star 25–40 with Neutron very high II-L or II-b star metallicity 40–90 with Black low None Iron core collapse hole metallicity Black hole after fallback with Faint Ib/c, or of ≥40 near-solar hypernova material metallicity with (GRB) onto an initial neutron star with very ≥40 Neutron high Ib/c star metallicity None, with low Black ≥90 possible metallicity hole GRB II-P, 140–250 sometimes a No Pair instability with low hypernova, remnant metallicity possible GRB None (or with luminous Massive ≥250 Photodisintegration low supernova?), black metallicity possible hole GRB
Cause of collapse Progenitor star approximate initial mass Supernova Type Remnant Electron capture in a degenerate O+Ne+Mg core 8–10 Faint II-P Neutron star Iron core collapse 10–25 II-P Neutron star 25–40 with low or solar metallicity Normal II-P Black hole after fallback of material onto an initial neutron star 25–40 with very high metallicity II-L or II-b Neutron star 40–90 with low metallicity None Black hole ≥40 with near-solar metallicity Faint Ib/c, or hypernova with (GRB) Black hole after fallback of material onto an initial neutron star ≥40 with very high metallicity Ib/c Neutron star ≥90 with low metallicity None, possible GRB Black hole Pair instability 140–250 with low metallicity II-P, sometimes a hypernova, possible GRB No remnant Photodisintegration ≥250 with low metallicity None (or luminous supernova?), possible GRB Massive black hole
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