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Recalibration of the MBH−σ⋆ relation for AGN

Recalibration of the MBH−σ⋆ relation for AGN
Recalibration of the MBH−σ⋆ relation for AGN
We present a re-calibration of the MBH − σ⋆ relation, based on a sample of 16 reverberation-mapped galaxies with newly determined bulge stellar velocity dispersions (σ⋆) from integral-field spectroscopy (IFS), and a sam- ple of 32 quiescent galaxies with publicly available IFS. For both samples, σ⋆ is determined via two different methods that are popular in the literature, and we provide fits for each sample based on both sets of σ⋆. We find the fit to the AGN sample is shallower than the fit to the quiescent galaxy sample, and that the slopes for each sample are in agreement with previous investigations. However, the intercepts to the quiescent galaxy relations are notably higher than those found in previous studies, due to the systematically lower σ⋆ measurements that we obtain from IFS. We find that this may be driven, in part, by poorly constrained measurements of bulge effective radius (re) for the quiescent galaxy sample, which may bias the σ⋆ measurements low. We use these quiescent galaxy parameterizations, as well as one from the literature, to recalculate the virial scaling factor f . We assess the potential biases in each measurement, and suggest f = 4.82 ± 1.67 as the best currently available estimate. However, we caution that the details of how σ⋆ is measured can significantly affect f, and there is still much room for improvement.
2041-8205
Batiste, Merida
4fadf88b-cbf1-4f37-b1db-d4387b24c501
Bentz, Misty C.
23985c11-6a62-4679-a66e-88e71b14da5b
De Jesus Raimundo, Sandra
e409d9d3-17e8-4049-ad29-43ada60b24e2
Vestergaard, Marianne
3d2377bc-0c0a-4198-9439-e7e9ac344b4e
Onken, Christopher A.
0915cd93-3ee5-4f45-90ba-af671d66e02c
Batiste, Merida
4fadf88b-cbf1-4f37-b1db-d4387b24c501
Bentz, Misty C.
23985c11-6a62-4679-a66e-88e71b14da5b
De Jesus Raimundo, Sandra
e409d9d3-17e8-4049-ad29-43ada60b24e2
Vestergaard, Marianne
3d2377bc-0c0a-4198-9439-e7e9ac344b4e
Onken, Christopher A.
0915cd93-3ee5-4f45-90ba-af671d66e02c

Batiste, Merida, Bentz, Misty C., De Jesus Raimundo, Sandra, Vestergaard, Marianne and Onken, Christopher A. (2017) Recalibration of the MBH−σ⋆ relation for AGN. The Astrophysical Journal Letters, 838 (1), [L10]. (doi:10.3847/2041-8213/aa6571).

Record type: Article

Abstract

We present a re-calibration of the MBH − σ⋆ relation, based on a sample of 16 reverberation-mapped galaxies with newly determined bulge stellar velocity dispersions (σ⋆) from integral-field spectroscopy (IFS), and a sam- ple of 32 quiescent galaxies with publicly available IFS. For both samples, σ⋆ is determined via two different methods that are popular in the literature, and we provide fits for each sample based on both sets of σ⋆. We find the fit to the AGN sample is shallower than the fit to the quiescent galaxy sample, and that the slopes for each sample are in agreement with previous investigations. However, the intercepts to the quiescent galaxy relations are notably higher than those found in previous studies, due to the systematically lower σ⋆ measurements that we obtain from IFS. We find that this may be driven, in part, by poorly constrained measurements of bulge effective radius (re) for the quiescent galaxy sample, which may bias the σ⋆ measurements low. We use these quiescent galaxy parameterizations, as well as one from the literature, to recalculate the virial scaling factor f . We assess the potential biases in each measurement, and suggest f = 4.82 ± 1.67 as the best currently available estimate. However, we caution that the details of how σ⋆ is measured can significantly affect f, and there is still much room for improvement.

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Recalibration of the MBH−σ⋆ Relation for AGN - Accepted Manuscript
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Accepted/In Press date: 8 December 2016
e-pub ahead of print date: 24 March 2017
Published date: 24 March 2017
Additional Information: ARXIV IS AM

Identifiers

Local EPrints ID: 443915
URI: http://eprints.soton.ac.uk/id/eprint/443915
ISSN: 2041-8205
PURE UUID: 8065dca9-068a-422a-8da1-565e4b96ab94

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Date deposited: 16 Sep 2020 16:35
Last modified: 21 Oct 2021 16:39

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Contributors

Author: Merida Batiste
Author: Misty C. Bentz
Author: Marianne Vestergaard
Author: Christopher A. Onken

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