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dark matter hypothesis
aIs it possible that the missing mass, the 'dark matter',
consists of two generations of burned out stars? These would be short lifetimes, hence large masses, according to star formation theory, hence mostly black holes or neutron stars. I don't see that as a problem. What are the counter-arguments? -- Rich [[Mod. note -- Microlensing studies show that at most a small fraction of the dark matter in the Milky Way's halo can be in compact objects of stellar mass. For example, the EROS project https://arxiv.org/abs/astro-ph/0607207 concluded that "machos in the mass range 0.6e-7 M_sun M 15 M_sun are ruled out as the primary occupants of the Milky Way Halo". I don't know offhand what (if any) limits there are for M31 or maybe other galaxies. -- jt]] |
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