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arxiv: 1112.3771 · v1 · pith:RQ5JEJ4Znew · submitted 2011-12-16 · 🌌 astro-ph.CO

Outer disks of lenticular galaxies

classification 🌌 astro-ph.CO
keywords galaxiesdisksouterstellaracceptedagesalongbulges
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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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