Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982sscr.conf..313c&link_type=abstract
In: Supernovae: A survey of current research; Proceedings of the Advanced Study Institute, Cambridge, England, June 29-July 10,
Astronomy and Astrophysics
Astrophysics
4
Cosmology, Galactic Evolution, Stellar Evolution, Supermassive Stars, Abundance, Background Radiation, Critical Mass, Dwarf Stars, G Stars, Galactic Clusters, Mass Spectra, Missing Mass (Astrophysics), Red Shift, Stellar Mass, Stellar Spectra
Scientific paper
Arguments for believing that very massive objects (VMOs) may have formed in the pregalactic era, with important cosmological consequences, are presented. Considerations such as the initial absence of metals in the universe and the influence of the background radiation suggest that pregalactic stars could predominantly have existed in the VMO range. The missing mass in galactic halos and clusters could be accounted for by VMOs larger than a critical mass of about 200-500 solar masses. Models of VMO formation which account for the present level of enrichment are discussed and related to abundance problems such as the G-dwarf problem and the oxygen anomaly. Constraints placed on the pregalactic star mass spectrum and formation redshift by radiation generated by VMOs are addressed, and the distortions observed in the spectrum of the 3K background is explained in terms of grain-thermalized VMO radiation. The possible role of VMOs as seed objects for the formation of galaxies is also discussed.
Arnett David. W.
Bond Richard J.
Carr Bernard J.
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