In what region of the Milky Way Galaxy would you expect to find Type I supernovae Why?

Answer 1

Unlike the other types of supernovae, Type Ia supernovae generally occur in all types ofgalaxies, including ellipticals and they show no preference for regions of current stellar formation - they can occur anywhere in the Milky Way Galaxy.
The reason for this is that Type 1 supernovae occur when the remnant of a small star (a white dwarf) accreets enough mass (by gas capture from, or merger with another star) to exceed the Chandrasekhar limit of about 1.38 solar masses. When this mass is exceeded carbon fusion is reignited in the stellar core and the star explodes and as white dwarf stars are to be found everywhere in Galaxies and Globular clusters, the potential for Type 1 supernovae is universal. That said, obviously you would not expect to find White Dwarf stars in current star forming areas (because the dwarf forms at the end of a stars main sequence life). However Galactic rotation mixes old stars with new stars relatively quickly and this separation rapidly blurs.

Answer 2

Type I supernovae are commonly found in the disk of the Milky Way Galaxy. This is because they are associated with binary star systems where a white dwarf accretes matter from a companion star, leading to a runaway nuclear fusion reaction and explosion. Regions with high star formation rates, such as the disk, are more likely to host these types of systems.