Photometric classification of normal galaxies and their redshift determination

Details Photometric classification of normal galaxies and their redshift determination Photometric classification of normal galaxies and their redshift determination

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ap%26ss..94...23s&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 94, no. 1, July 1983, p. 23-30.

Astronomy and Astrophysics

Astrophysics

4

Astronomical Photometry, Galaxies, Red Shift, Color, Galactic Evolution, Interstellar Extinction, Magnitude, Metallicity

Scientific paper

Two-color diagrams including magnitudes from several photometric systems are investigated with respect to the possibility of determining from the integrated photometry the galaxy type and its redshift. The color indices of galaxies are calculated using the energy distribution curves of Coleman et al. (1980). It is shown that redshift determination at low values of z requires an UV magnitude with an initial wavelength shorter than 300 nm. At redshifts z more than 0.6, the infrared magnitude photometry becomes important. Different sources of errors and uncertainties are discussed.

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