SIMBAD references

2018MNRAS.476.2137R - Mon. Not. R. Astron. Soc., 476, 2137-2167 (2018/May-2)

S0 galaxies are faded spirals: clues from their angular momentum content.


Abstract (from CDS):

The distribution of galaxies in the stellar specific angular momentum versus stellar mass plane (j* - M*) provides key insights into their formation mechanisms. In this paper, we determine the location in this plane of a sample of 10 field/group unbarred lenticular (S0) galaxies from the Calar Alto Legacy Integral Field Area survey. We performed a bulge-disc decomposition both photometrically and kinematically to study the stellar specific angular momentum of the disc components alone and understand the evolutionary links between S0s and other Hubble types. 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.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: evolution - galaxies: formation - galaxies: fundamental parameters - galaxies: kinematics and dynamics

Simbad objects: 13

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