High and low S\'ersic index bulges in Milky Way- and M31-like galaxies: origin and connection to the bar with TNG50

@inproceedings{Gargiulo2021HighAL,
  title={High and low S\'ersic index bulges in Milky Way- and M31-like galaxies: origin and connection to the bar with TNG50},
  author={Ignacio D. Gargiulo and Antonela Monachesi and Facundo A. G'omez and Dylan Nelson and Annalisa Pillepich and R{\"u}diger Pakmor and Robert J. J. Grand and Francesca Fragkoudi and Lars Hernquist and Mark R. Lovell and Federico Marinacci},
  year={2021}
}
We study bulge formation inMW/M31-like galaxies in aΛ-cold dark matter scenario, focusing on the origin of highand low-Sersic index bulges. For this purposewe useTNG50, a simulation of the IllustrisTNG project that combines a resolution of ∼ 8× 104M in stellar particles with a cosmological volume 52 cMpc in extent. We parametrize bulge surface brightness profiles by the Sérsic index and the bulge-to-total (B/T) ratio obtained from two-component photometric decompositions. In our sample of 287MW… 

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