Lyman-α blobs are spatially extended nebulae of hydrogen line emission that may hold clues for understanding the formation and evolution of massive galaxies at high redshifts. Recent observations and simulations suggest that multiple mechanisms can explain the origin of these objects, notably including gravitational cooling radiation.
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Smith, A. Dynamics of Lyman-α blobs. Nat Astron 4, 648–649 (2020). https://doi.org/10.1038/s41550-020-1075-6
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DOI: https://doi.org/10.1038/s41550-020-1075-6
