Neutral hydrogen in cosmic voids

Details Neutral hydrogen in cosmic voids Neutral hydrogen in cosmic voids

Oct 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984aj.....89.1461k&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 89, Oct. 1984, p. 1461-1463. Research supported by the Israel Academy of Sciences an

Mathematics

Logic

26

Hydrogen Clouds, Intergalactic Media, Interstellar Matter, Neutral Gases, Voids, Nebulae, Spatial Distribution, Universe

Scientific paper

An unsuccessful search was conducted for H I clouds in two voids in the cosmic distribution of galaxies. The search employed the Green Bank 300-ft telescope, and was sensitive (at the 4sigma-level) to clouds of mass greater than about 10 to the 10th/sq h solar mass (assuming sizes less than about 100/h kpc and velocity spreads less than 100 km/s). Roughly 7 percent of the Perseus-Pisces void and 19 percent of the Hercules void were searched. It is concluded that the voids do not contain a cosmologically significant population of H I protogalaxies, and evidence consistent with the hypothesis that the voids are indeed regions of low matter density in the universe is summarized.

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