Correlations between black holes and host galaxies in the Illustris and IllustrisTNG simulations
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...
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| Hauptverfasser: | , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2020 June 2
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| In: |
The astrophysical journal
Year: 2020, Jahrgang: 895, Heft: 2, Pages: 1-16 |
| ISSN: | 1538-4357 |
| DOI: | 10.3847/1538-4357/ab8f8d |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.3847/1538-4357/ab8f8d
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| Verfasserangaben: | Yuan Li, Melanie Habouzit, Shy Genel, Rachel Somerville, Bryan A. Terrazas, Eric F. Bell, Annalisa Pillepich, Dylan Nelson, Rainer Weinberger, Vicente Rodriguez-Gomez, Chung-Pei Ma, Ruediger Pakmor, Lars Hernquist, and Mark Vogelsberger |
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| 245 | 1 | 0 | |a Correlations between black holes and host galaxies in the Illustris and IllustrisTNG simulations |c Yuan Li, Melanie Habouzit, Shy Genel, Rachel Somerville, Bryan A. Terrazas, Eric F. Bell, Annalisa Pillepich, Dylan Nelson, Rainer Weinberger, Vicente Rodriguez-Gomez, Chung-Pei Ma, Ruediger Pakmor, Lars Hernquist, and Mark Vogelsberger |
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| 520 | |a 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 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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