Monday, December 19, 2011

1112.3771 (Olga K. Sil'chenko)

Outer disks of lenticular galaxies    [PDF]

Olga K. Sil'chenko
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.
View original: http://arxiv.org/abs/1112.3771

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