Some dark matter candidates are thought to collect in the centers of massive objects like planets and stars, and this includes MACHO dark matter candidates such as primordial black holes (PBHs). PBHs are now well constrained as dark matter - the mass window comparable to asteroids between about 10^17 to 10^23 grams is one of the few remaining unconstrained windows. In recent work, we have developed new capabilities for the MESA stellar evolution software to study the effects of captured PBHs on stellar evolution. We find that stars with asteroid-mass central black holes can be very long lived and may even have extended giant phases that can be searched for asteroseismically. Despite the sun being unlikely to host a These methods are also more general than they seem. For example, stars in ultrafaint dwarf galaxies and globular clusters may capture dark matter with very high likelihood, potentially resulting in very large numbers of stars with core PBHs. While it is admittedly quite unlikely that our sun has a central PBH, the effects of non-accreting MACHO dark matter are also straightforward to study with our new MESA scheme, including impacts on solar neutrinos.
