BULGE n AND B/T IN HIGH-MASS GALAXIES: CONSTRAINTS ON THE ORIGIN OF BULGES IN HIERARCHICAL MODELS

@article{Weinzirl2009BULGENA,
  title={BULGE n AND B/T IN HIGH-MASS GALAXIES: CONSTRAINTS ON THE ORIGIN OF BULGES IN HIERARCHICAL MODELS},
  author={Tim Weinzirl and Shardha Jogee and Sadegh Khochfar and Andreas Burkert and John Kormendy},
  journal={The Astrophysical Journal},
  year={2009},
  volume={696},
  pages={411 - 447}
}
We use the bulge Sérsic index n and bulge-to-total mass ratio (B/T) to explore the fundamental question of how bulges form. We perform two-dimensional bulge–disk–bar decomposition on H-band images of 143 bright, high-mass (M⋆ ⩾ 1.0 × 1010M☉) low-to-moderately inclined (i < 70°) spirals. Our results are as follows. (1) Our H-band bar fraction (∼58%) is consistent with that from ellipse fits. (2) 70% of the stellar mass is in disks, 10% in bars, and 20% in bulges. (3) A large fraction (∼69%) of… 
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