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Gases from stars heat up...?
...as the star is stripped outside a black hole's event horizon. Why? (The star's internal gravity decreases as it is torn apart, therefor the fusion of the stellar gases should decrease; and Boyle's gas law states that as pressure decreases, temperature decreases.)
2 Answers
- ?Lv 78 years agoFavorite Answer
It is velocity -- combined with friction.
At the event horizon of the black hole, the escape velocity is the speed of light -- and conversely, the speed at which incoming material is falling toward the black hole is the speed of light. At that velocity there are very high energy collisions, which is a measure of the temperature of the particles.
Initially, in the core of the star, the loss of material to the black hole makes no appreciable difference to the core pressure of the star.
But eventually, the pressure would fall.
- zaragosaLv 45 years ago
The gases that crumple to type the megastar are fairly cool - it incredibly is between the circumstances that scientists struggled with to understand the 1st stars (by using fact the gas interior the early universe grew to become into lots warmer than immediately). yet get sufficient cool gas at the same time and gravity takes over, conserving it from increasing and persevering with the crumple till fusion starts.
