MACHOs May Be Out of Running as Dark Matter Candidate

A recently discovered ultra-faint dwarf galaxy is sending astronomers clues about the makeup of dark matter in the neighborhood of the Milky Way. It is one more clue that a type of stellar object called massive compact halo objects (MACHOs) are probably not the dominant component of dark matter in the universe. A star cluster in the Eridanus II ultra-faint dwarf galaxy is hinting to Timothy Brandt, Member in the School of Natural Sciences, that dark matter cannot be made of MACHOs of more than about five times the mass of our sun. Read more


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