Abstract
view Abstract Citations (115) References (13) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A New Upper Limit on the Density of Generally Distributed Intergalactic Neutral Hydrogen Steidel, Charles C. ; Sargent, Wallace L. W. Abstract A new upper limit on the number density of generally distributed intergalactic neutral hydrogen is obtained based upon recent spectrophotometric observations of very high redshift QSOs coupled with high-resolution statistical studies of the Lyα forest in QSOs. The new limit, nH I(z = 0.0) < 9.0×10-14h100cm-3, is approximately 15 times smaller than the limit originally proposed by Gunn and Peterson. Publication: The Astrophysical Journal Pub Date: July 1987 DOI: 10.1086/184927 Bibcode: 1987ApJ...318L..11S Keywords: Density Distribution; Gas Density; Hydrogen; Intergalactic Media; Neutral Gases; Quasars; Astronomical Spectroscopy; Gas Ionization; Line Spectra; Lyman Alpha Radiation; Red Shift; Ultraviolet Radiation; Astrophysics; GALAXIES: INTERGALACTIC MEDIUM; QUASARS full text sources ADS | data products SIMBAD (1) NED (1)
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