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  Correlations between black holes and host galaxies in the Illustris and IllustrisTNG simulations

Li, Y., Habouzit, M., Genel, S., Somerville, R., Terrazas, B. A., Bell, E. F., et al. (2020). Correlations between black holes and host galaxies in the Illustris and IllustrisTNG simulations. The Astrophysical Journal, 895(2): 102. doi:10.3847/1538-4357/ab8f8d.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0007-03F1-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0007-03F2-4
Genre: Journal Article

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 Creators:
Li, Yuan, Author
Habouzit, Melanie, Author
Genel, Shy, Author
Somerville, Rachel, Author
Terrazas, Bryan A., Author
Bell, Eric F., Author
Pillepich, Annalisa, Author
Nelson, Dylan1, Author              
Weinberger, Rainer, Author
Rodriguez-Gomez, Vicente, Author
Ma, Chung-Pei, Author
Pakmor, Ruediger2, Author              
Hernquist, Lars, Author
Vogelsberger, Mark, Author
Affiliations:
1Galaxy Formation, MPI for Astrophysics, Max Planck Society, ou_2205643              
2Stellar Astrophysics, MPI for Astrophysics, Max Planck Society, ou_159882              

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 Abstract: We study black hole–host galaxy correlations, and the relation between the overmassiveness (the distance from the average MBH–σ relation) of supermassive black holes (SMBHs) and the star formation histories of their host galaxies in the Illustris and TNG100 simulations. We find that both simulations are able to produce black hole scaling relations in general agreement with observations at z = 0, but with noticeable discrepancies. Both simulations show an offset from the observations for the MBH–σ relation, and the relation between MBH and the Sérsic index. The relation between MBH and stellar mass M*is tighter than the observations, especially for TNG100. For massive galaxies in both simulations, the hosts of overmassive SMBHs (those above the mean MBH–σ relation) tend to have larger Sérsic indices and lower baryon conversion efficiency, suggesting a multidimensional link between SMBHs and the properties of their hosts. In Illustris, the hosts of overmassive SMBHs have formed earlier and have lower present-day star formation rates, in qualitative agreement with the observations for massive galaxies with σ > 100 km s−1. For low-mass galaxies, such a correlation still holds in Illustris but does not exist in the observed data. For TNG100, the correlation between SMBH overmassiveness and star formation history is much weaker. The hosts of overmassive SMBHs generally have consistently larger star formation rates throughout history. These galaxies have higher stellar mass as well, due to the strong M MBH–M* correlation. Our findings show that simulated SMBH scaling relations and correlations are sensitive to features in the modeling of SMBHs.

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 Dates: 2020-06-02
 Publication Status: Published online
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 Identifiers: DOI: 10.3847/1538-4357/ab8f8d
Other: LOCALID: 3252658
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Title: The Astrophysical Journal
Source Genre: Journal
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Publ. Info: Bristol; Vienna : IOP Publishing; IAEA
Pages: - Volume / Issue: 895 (2) Sequence Number: 102 Start / End Page: - Identifier: ISSN: 0004-637X
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215_3