Faint galaxies - Evolution and cosmological curvature

Details Faint galaxies - Evolution and cosmological curvature Faint galaxies - Evolution and cosmological curvature

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992natur.355...55b&link_type=abstract

Nature (ISSN 0028-0836), vol. 355, Jan. 2, 1992, p. 55-58. Research supported by SERC.

Astronomy and Astrophysics

Astronomy

257

Faint Objects, Galactic Evolution, Infrared Astronomy, Space-Time Functions, Curvature, Infrared Sources (Astronomy), Near Infrared Radiation, Sky Surveys (Astronomy), Star Formation Rate

Scientific paper

An evolutionary model is presented in which galaxies merge at recent look-back times, thereby rendering the contrast between optical and IR galaxy counts a direct consequence of the very different lifetimes of stellar types contributing to emission in the galactic rest-frame. This merging model is shown to be able to account for both the number-magnitude relations and extant redshift distributions. It is predicted that high-redshift galaxies should be absent from deep IR-selected surveys; if the model is verified, the conjecture that galaxies are unreliable tracers of universe geometry will have received additional support.

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