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When high mass stars run out of hydrogen in their core, several outcomes can occur depending on their mass. Here are some possibilities:
1. They become red giants: High mass stars, also known as massive stars, will expand and become red giants as they transition to burning helium in their core. During this phase, the star swells in size and becomes cooler, appearing red in color.
2. They explode: High mass stars can end their lives in a dramatic event called a supernova. When the core of a massive star collapses after running out of fuel, it can trigger a massive explosion, releasing an immense amount of energy and matter into space.
3. They become white dwarfs: In some cases, high mass stars can go through a supernova explosion and leave behind a dense core known as a white dwarf. This remnant can be incredibly hot and will eventually cool down over billions of years.
Therefore, when high mass stars deplete their hydrogen fuel, their fate can involve becoming red giants, exploding in a supernova, or forming white dwarfs depending on their mass and evolutionary path.
