The ages of the disks of S0 galaxies

Details The ages of the disks of S0 galaxies The ages of the disks of S0 galaxies

May 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...268...90c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 268, May 1, 1983, p. 90-101.

Astronomy and Astrophysics

Astrophysics

27

Disk Galaxies, Galactic Evolution, Spiral Galaxies, Stellar Evolution, Abundance, Astronomical Photometry, Early Stars, Electrophotometry, Luminosity

Scientific paper

A photometric system using a broad-band color combined with a line strength index is employed to distinguish age differences from metallicity differences between the bulges and disks of S0 galaxies. A color difference independent of metallicity changes of about delta (U-V) = 0.10 is found for the sample of galaxies observed here. Several S0 galaxies have absorption line strengths that indicate the disks are as metal-rich as the most luminous elliptical galaxies. It is concluded that the disks of S0 galaxies are probably younger than the bulges, but the distinction between a younger turnoff and residual star formation cannot be made.

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