Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...202....1s&link_type=abstract
Astrophysical Journal, vol. 202, Nov. 15, 1975, pt. 1, p. 1-6. Research supported by the United States-Israel Binational Science
Astronomy and Astrophysics
Astronomy
67
Cosmology, Intergalactic Media, Nuclear Fusion, X Ray Astronomy, Elliptical Galaxies, Energy Dissipation, Ionized Gases, Quasars, Radio Sources (Astronomy), Shock Waves, Stellar Mass Ejection, Supernovae, Universe
Scientific paper
Large-scale explosions, possibly the cumulative effects of supernovae, may have occurred in the early history of the Universe (z ranging between 2 and 10). The observed metal abundances in evolved stars in giant ellipticals suggest that as much as 10 to the 51-st power ergs per solar mass of metal-rich material might have been released. Alternatively, the energy output of any galaxy can be estimated at 5 times 10 to the 51-st power ergs per present visual solar luminosity. Blast waves from such a large input of energy could heat and ionize an intergalactic medium of closure density to a degree that would be consistent with the limits on both the 21-cm absorption in nearby radio sources and the L-alpha absorption in quasars. The bremsstrahlung radiation emitted by the ionized gas might explain the possible excess observed in the diffuse X-ray background below 1 keV.
Ostriker Jeremiah P.
Schwarz John
Yahil Amos
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