Color and star formation in the outer parts of disks of spiral galaxies

Details Color and star formation in the outer parts of disks of spiral galaxies Color and star formation in the outer parts of disks of spiral galaxies

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987azh....64..900z&link_type=abstract

Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 64, Sept.-Oct. 1987, p. 900-909. In Russian.

Other

Disk Galaxies, Spectrum Analysis, Spiral Galaxies, Star Formation, Stellar Color, Ubv Spectra, Abundance, Galactic Evolution, Stellar Spectrophotometry

Scientific paper

Published UBV colours of outer parts of disks of galaxies (beyond the region of clearly defined spiral arms) are analysed. Influence of different factors on the observed colour of a stellar system is discussed. It is shown that star formation is taking place in outer parts of most galaxies considered. Several early-type spirals have colours of external disks which can be accounted for either by a lower metal abundance of stars (in comparison to other galaxies) or by a sharp stop of star formation several billions of years ago.

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