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A Revised Parallel-sequence Morphological Classification of Galaxies: Structure and Formation of S0 and Spheroidal Galaxies

  • Authors: John Kormendy and Ralf Bender

Kormendy & Bender 2012 The Astrophysical Journal Supplement Series 198 2.

  • Provider: AAS Journals

Caption: Figure 1.

Revised parallel-sequence morphological classification of galaxies. E types are from Kormendy & Bender (1996). Transition objects between spirals and S0s (van den Bergh's anemic galaxies) exist but are not illustrated. Bulge-to-total ratios decrease toward the right; Sc and S0c galaxies have tiny or no pseudobulges. Sph and Im galaxies are bulgeless.

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