Galaxy infrared colour magnitude relations

Details Galaxy infrared colour magnitude relations Galaxy infrared colour magnitude relations

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.199p...1w&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 199, Apr. 1982, p. 1P-8P.

Astronomy and Astrophysics

Astronomy

38

Hertzsprung-Russell Diagram, Infrared Astronomy, Spiral Galaxies, Brightness, Correlation Coefficients, Disk Galaxies, Galactic Radiation

Scientific paper

Because of the necessity of correcting for absorption when estimating the total face-on blue apparent magnitude for spiral galaxies, the infrared Tully-Fisher relation was investigated in order to obtain the absolute magnitudes, and hence distances, to spiral galaxies with detectable hydrogen. The relationship of total face-on blue absolute magnitudes to absolute infrared, or H-magnitudes, is described. Using truncated blue magnitudes, the color-magnitude plane is investigated as a distance indicator. The existence of an infrared (B-H, H) color-absolute magnitude relation for a sample of disk galaxies of various morphological types is shown and its use as a distance indicator suggested. The question of morphological type dependence is discussed.

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