Abstract
view Abstract Citations (181) References (68) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Optical multicolors : a poor person's Z machine for galaxies. Koo, D. C. Abstract The feasibility, limits, accuracy, and uncertainties of using optical broadband colors in the form of two-color plots to measure the redshifts of faint galaxies are explored. Comparison of redshifts from slit spectra and 4-m photographic UBVI photometry of 100 faint galaxies confirms that colors do yield redshifts. These galaxies of 17-23 mag in B span a wide range of intrinsic color and are thus unlike previous samples of faint galaxies that were largely radio or cluster galaxies of early (red) type. For redshifts less than 0.35, two-thirds of the color redshifts agree with the spectroscopic values to within + or - 0.04 in z; for higher redshifts to z of 0.6, the errors increase to + or - 0.06. These accuracies were achieved for blue as well as red galaxies, and ensure that multicolors can serve as a poor person's redshift machine to study distant galaxies in clusters and the field. Publication: The Astronomical Journal Pub Date: March 1985 DOI: 10.1086/113748 Bibcode: 1985AJ.....90..418K Keywords: Astronomical Spectroscopy; Color; Galactic Clusters; Red Shift; Visible Spectrum; Astronomical Catalogs; Broadband; Cosmic Dust; Galactic Evolution; Random Errors; Spectral Energy Distribution; Stellar Color; Astrophysics full text sources ADS | data products SIMBAD (1) NED (1)
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