This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: Chapter 9 Notes Low mass stars fade in billions of years Medium mass star .8 to 8 solar masses form a planetary nebula and leave a white dwarf High mass stars more than 8 solar masses: Supernovae and leave a neutron star and supernova remnants Types of Supernovae Novae (associated with a RG and WD binary system: The hydrogen gas on the surface of a WD violently explodes Type 1A (asscociated with a RG and WD binary system: The WD explodes approaches the 1.4 solar mass WD is destroyed. Leaves supernova remnant, Spectra lacks hydrogen lines Type 2 Core collapses of a high mass star (8 to 25 solar masses): Leaves a NS and a supernova remnant: Spectra contains hydrogen lines. Neutron Stars are compact objects formed when the cores of a high mass stars, move more than 8 solar masses, collapse during the supernovae explosions Most neutron stars are located inside of supernovae remnants Cassiopeia A (Cas A), the youngest supernova remnant, 300 years old in the Milky has a NS in its...
View Full Document
- Spring '08