Colour-absolute magnitude relation for spiral galaxies

Details Colour-absolute magnitude relation for spiral galaxies Colour-absolute magnitude relation for spiral galaxies

Jul 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a...100l..20v&link_type=abstract

Astronomy and Astrophysics, vol. 100, no. 2, July 1981, p. L20-L22.

Astronomy and Astrophysics

Astrophysics

27

Astronomical Photometry, Hertzsprung-Russell Diagram, Interstellar Extinction, Spiral Galaxies, Stellar Structure, Virgo Galactic Cluster, Electrophotometry, Galactic Evolution, Galactic Structure

Scientific paper

Multicolour and multiaperture photometry of 22 late-type Virgo cluster galaxies and 23 field spirals in a new V(5500 Å) r (6738 Å) and IV (10500 Å) system shows the existence of a correlation between the colours (r-IV)c-0.5', (V-IV)c-0.5 and the IV absolute magnitude. The colour-magnitude (C-M) gradient is .17 and .23 in r and V wavelengths respectively. This means the young population resulting from the recent star formation in spirals, is seen in the red and visual wavelengths and is directly related to the mass of the old population in the galaxy.

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