The Color-Dependent Frequency of XUV Disks In Low-Mass E/S0s

@article{Moffett2011TheCF,
  title={The Color-Dependent Frequency of XUV Disks In Low-Mass E/S0s},
  author={Amanda J. Moffett and Sheila J. Kannappan and Andrew J. Baker and Seppo Laine University of North Carolina and Rutgers and Spitzer Science Center},
  journal={Eas Publications Series},
  year={2011},
  volume={48},
  pages={419-421}
}
We identify a high frequency of Type 1 XUV disks, reflecting recent outer-disk star formation, in a sample of 31 E/S0s with stellar masses primarily below M ∗ ~ 4 × 10 10 M ⊙ . Our ~40% identification rate is roughly twice the 20% fraction reported for late-type galaxies. Intriguingly, in the dwarf mass regime (below M ∗ ~ 5 × 10 9 M ⊙ ) where gas fractions increase, Type 1 XUV disks occur in ~70% of red -sequence E/S0s but only ~20% of blue-sequence E/S0s, a population recently linked to… Expand

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