Demographics of bulge types within 11 Mpc and implications for galaxy evolution

  title={Demographics of bulge types within 11 Mpc and implications for galaxy evolution},
  author={D. B. Fisher and Niv Drory},
  journal={The Astrophysical Journal},
We present an inventory of galaxy bulge types (elliptical galaxy, classical bulge, pseudobulge, and bulgeless galaxy) in a volume-limited sample within the local 11 Mpc sphere using Spitzer 3.6 μm and Hubble Space Telescope data. We find that whether counting by number, star formation rate, or stellar mass, the dominant galaxy type in the local universe has pure disk characteristics (either hosting a pseudobulge or being bulgeless). Galaxies that contain either a pseudobulge or no bulge combine… Expand

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