Abstract
We show that present day observational techniques make it possible to detect diffuse gas masses down to ∼1010 M ⊙ in cosmic voids with linear sizes of ∼1 Mpc or larger. The observations consist of searches for absorption lines, similar in character to those produced in galactic interstellar clouds, in the spectra of high-redshift objects located beyond previously identified voids adjoining nearby superclusters.
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Brosch, N., Greenberg, J.M. High-redshift objects as probes of nearby cosmic voids. Astrophys Space Sci 90, 457–460 (1983). https://doi.org/10.1007/BF00650077
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DOI: https://doi.org/10.1007/BF00650077