The discovery supports a powerful tool for discovering galaxies that are otherwise too distant to observe, and could lead to advances that improve our understanding of dark matter.
New analysis of an image taken by the Atacama Large Millimeter/submillimeter Array (ALMA) reveals evidence that a dwarf dark galaxy – a tiny halo companion of a much larger galaxy – is lurking nearly 4 billion light-years away. This discovery, led by a Stanford astrophysicist and announced today, paves the way for ALMA to find many more such objects, which could help astronomers address important questions on the nature of dark matter.
