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Massive bulges are not just ellipticals surrounded by disks

Published online by Cambridge University Press:  17 July 2013

Dimitri A. Gadotti*
Affiliation:
European Southern Observatory email: dgadotti@eso.org
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Abstract

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Using results from parametric multi-component multi-band image fitting of 1000 local massive galaxies in the SDSS, I investigate scaling relations of elliptical galaxies and bulges of disk galaxies. I show that ellipticals and bulges occupy different loci in both the edge-on and face-on views of the fundamental plane. In addition, ellipticals and bulges have offset mass-size relations (see Fig. 1). These results imply that massive bulges are not just massive ellipticals with a surrounding disk, a misconception driven by early studies. This is evidence that massive ellipticals and bulges have different formation histories, with important consequences for studies on galaxy formation and evolution. Full details can be seen in Gadotti (2009).

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2013 

References

Gadotti, D. A. 2009, MNRAS, 393, 1531CrossRefGoogle Scholar