The evolution of spiral galaxies and uncertainties in interpreting galaxy counts

Details The evolution of spiral galaxies and uncertainties in interpreting galaxy counts The evolution of spiral galaxies and uncertainties in interpreting galaxy counts

Jan 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...288..456k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 288, Jan. 15, 1985, p. 456-464.

Astronomy and Astrophysics

Astronomy

128

Astronomical Spectroscopy, Galactic Evolution, Spiral Galaxies, Ultraviolet Astronomy, Astronomical Models, Elliptical Galaxies, Spectral Energy Distribution

Scientific paper

Evolutionary models are discussed with respect to the interpretation of faint galaxy counts. The K-corrections are reviewed with available UV data, and the necessary assumptions and model input parameters. In particular the possibility that the bulges of spiral galaxies have evolved in a form similar to that expected for elliptical galaxies is explored. The inclusion of bulge evolution predicts significantly more galaxies and may be consistent with the steepening count-magnitude slope at faint magnitudes. A significant fraction of Bj = 23 galaxies could be luminous compact objects with redshifts greater than 1 seen during their epoch of rapid star formation.

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