Conference paper Open Access

S0 Galaxies Are Faded Spirals: Clues from their Angular Momentum Content

Rizzo, Francesca

We study the stellar specific angular momentum of the disc components for a sample of ten field/group unbarred lenticular (S0) galaxies from the CALIFA survey. The location of these discs in the stellar j-M plane allows us to obtain clues on the physical processes that lead to the formation of S0s from spirals. We found that eight of our S0 discs have a distribution in the j-M plane that is fully compatible with that of spiral discs, while only two have values of j lower than the spirals. These two outliers show signs of recent merging. Our results suggest that merger and interaction processes are not the dominant mechanisms in S0 formation in low-density environments. Instead, S0s appear to be the result of secular processes and the fading of spiral galaxies after the shutdown of star formation.

Files (471.4 kB)
Name Size
471.4 kB Download
All versions This version
Views 8585
Downloads 6969
Data volume 32.5 MB32.5 MB
Unique views 7979
Unique downloads 6666


Cite as