Prompted by a recent PBS SpaceTime video

The video in question discusses what would happen if a low-mass (asteroid-mass) primordial black hole were captured in the core of a Sun-like star (a so-called "Hawking star"), and how it would influence the evolution and characteristics of the star. While the effects might not be particularly obvious for younger G-class stars, it feels intuitively likely that the lower the mass of the star, the greater the proprotional effect would be. In the extreme, a brown dwarf or planet-mass object seems likely to be altered dramatically by the presence of such a PBH. What might those effects be on a "Hawking brown dwarf" or "Hawking planet"?

  • $\begingroup$ Wouldn't it form a very short-lived miniature quasar? $\endgroup$ Dec 21, 2023 at 6:00
  • $\begingroup$ What do you mean by captured? $\endgroup$
    – ProfRob
    Dec 21, 2023 at 8:26
  • $\begingroup$ A recent related question: astronomy.stackexchange.com/q/55461/16685 $\endgroup$
    – PM 2Ring
    Dec 21, 2023 at 9:43
  • $\begingroup$ @bandybabboon Such black holes have a Schwarzschild radius of under a micron, so the rate that they absorb matter is quite small. $\endgroup$
    – PM 2Ring
    Dec 21, 2023 at 9:50
  • $\begingroup$ @ProfRob captured in this context means the black hole is in the core of the brown dwarf/planet. $\endgroup$
    – asgallant
    Dec 21, 2023 at 15:50


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