Outer disks of lenticular galaxies

Details Outer disks of lenticular galaxies Outer disks of lenticular galaxies

2011-12-16

arxiv.org/abs/1112.3771v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Proceedings of the IAU Symp. 284 "The Spectral Energy Distribution of Galaxies", Preston (UK), September 2011, eds. R. J. Tuff

Scientific paper

By studying the stellar population properties along the radius in 15 nearby
S0 galaxies, I have found that the outer stellar disks are mostly old, with the
SSP-equivalent ages of 8-15 Gyr, being often older than the bulges. This fact
puts into doubt a currently accepted paradigm that S0 galaxies have formed at
z=0.4 by quenching star formation in spiral galaxies.

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