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Detection of faint broad emission lines in type 2 AGNs – III. On the MBH-σ⋆ relation of type 2 AGNs

Detection of faint broad emission lines in type 2 AGNs – III. On the MBH-σ⋆ relation of type 2 AGNs
Detection of faint broad emission lines in type 2 AGNs – III. On the MBH-σ⋆ relation of type 2 AGNs
Type 2 active galactic nuclei (AGNs) represent the majority of the AGN population. However, due to the difficulties in measuring their black hole (BH) masses, it is still unknown whether they follow the same BH mass–host galaxy scaling relations valid for quiescent galaxies and type 1 AGNs. Here, we present the locus of type 2 AGNs having virial BH mass estimates in the MBH-σ⋆ plane. Our analysis shows that the BH masses of type 2 AGNs are ∼0.9 dex smaller than type 1 AGNs at σ⋆ ∼ 185 km s−1, regardless of the (early/late) AGN host galaxy morphology. Equivalently, type 2 AGN host galaxies have stellar velocity dispersions ∼0.2 dex higher than type 1 AGN hosts at MBH ∼ 107 M⊙.
0035-8711
L41-L46
Ricci, F.
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La Franca, F.
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Marconi, A.
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Onori, F.
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Shankar, F.
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Schneider, R.
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Sani, E.
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Bianchi, S.
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Bongiorno, A.
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Brusa, M.
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Maiolino, R.
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Vignali, C.
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Ricci, F.
32a03989-a0e3-41f4-b04a-39eaf32a6f4c
La Franca, F.
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Marconi, A.
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Onori, F.
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Shankar, F.
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Schneider, R.
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Sani, E.
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Bianchi, S.
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Bongiorno, A.
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Brusa, M.
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Fiore, F.
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Maiolino, R.
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Vignali, C.
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Ricci, F., La Franca, F., Marconi, A., Onori, F., Shankar, F., Schneider, R., Sani, E., Bianchi, S., Bongiorno, A., Brusa, M., Fiore, F., Maiolino, R. and Vignali, C. (2017) Detection of faint broad emission lines in type 2 AGNs – III. On the MBH-σ⋆ relation of type 2 AGNs. Monthly Notices of the Royal Astronomical Society, 471 (1), L41-L46. (doi:10.1093/mnrasl/slx103).

Record type: Article

Abstract

Type 2 active galactic nuclei (AGNs) represent the majority of the AGN population. However, due to the difficulties in measuring their black hole (BH) masses, it is still unknown whether they follow the same BH mass–host galaxy scaling relations valid for quiescent galaxies and type 1 AGNs. Here, we present the locus of type 2 AGNs having virial BH mass estimates in the MBH-σ⋆ plane. Our analysis shows that the BH masses of type 2 AGNs are ∼0.9 dex smaller than type 1 AGNs at σ⋆ ∼ 185 km s−1, regardless of the (early/late) AGN host galaxy morphology. Equivalently, type 2 AGN host galaxies have stellar velocity dispersions ∼0.2 dex higher than type 1 AGN hosts at MBH ∼ 107 M⊙.

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1706.06110 - Accepted Manuscript
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Accepted/In Press date: 18 June 2017
e-pub ahead of print date: 21 June 2017
Published date: October 2017
Organisations: Astronomy Group

Identifiers

Local EPrints ID: 412003
URI: http://eprints.soton.ac.uk/id/eprint/412003
ISSN: 0035-8711
PURE UUID: 6a8eb06f-f2b8-46a2-8067-93053b538bc4

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Date deposited: 04 Jul 2017 16:31
Last modified: 21 Nov 2021 07:22

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Contributors

Author: F. Ricci
Author: F. La Franca
Author: A. Marconi
Author: F. Onori
Author: F. Shankar
Author: R. Schneider
Author: E. Sani
Author: S. Bianchi
Author: A. Bongiorno
Author: M. Brusa
Author: F. Fiore
Author: R. Maiolino
Author: C. Vignali

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