dark star-forming galaxies tagged posts

Newly Discovered Group Hosts Two Optically Dark Star-Forming Galaxies

New galaxy group detected by astronomers
VISTA RGB color images of CGG-z4 at z ∼ 4.3 using the Ks (red), J (green), and i (blue) bands. Two spectroscopically confirmed galaxies have ALMA 3mm and 870µm continuum emission shown as green and yellow contours. Contours are shown at levels 5, 7, and 10σ. ALMA beam sizes and an image scale are shown in the lower right corner. The RGB frames are composed using linear scales with identical limits. Credit: Brinch et al., 2025.

An international team of astronomers reports the discovery of a new compact galaxy group using the Atacama Large Millimeter/submillimeter Array (ALMA). The new group, designated CGG-z4, hosts two optically dark star-forming galaxies. The finding was detailed in a research paper published on the pre-print server arXiv.

Galaxy groups are the smallest aggrega...

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