One of the new dark-galaxy candidates, identified through a combination of spectral information (left) and images reflecting the emission of gas (middle) and stars (right). The position of the dark-galaxy candidate is marked by the red circle. Credit: R. A. Marino / MUSE
The identification of at least six candidates for dark galaxies could help filling an important gap in our understanding of galaxy evolution. Dark galaxies have a few (if any) stars in them and are, for that reason, notoriously difficult to detect with current instruments.
Despite substantial progress over the past half a century in understanding of how galaxies form, important open questions remain regarding how precisely the diffuse gas known as the ‘intergalactic medium’ is converted into stars...
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