Stability of the Broad-line Region Geometry and Dynamics in Arp 151 over Seven Years

A. Pancoast; A. J. Barth; K. Horne; T. Treu; B. J. Brewer; V. N. Bennert; G. Canalizo; E. L. Gates; W. Li; M. A. Malkan; D. Sand; T. Schmidt; S. Valenti; J. H. Woo; K. I. Clubb; M. C. Cooper; S. M. Crawford; S. F. Hönig; M. D. Joner; M. T. Kandrashoff; M. Lazarova; A. M. Nierenberg; E. Romero-Colmenero; D. Son; E. Tollerud; J. L. Walsh; H. Winkler

doi:10.3847/1538-4357/aab3c6

Stability of the Broad-line Region Geometry and Dynamics in Arp 151 over Seven Years

A. Pancoast, A. J. Barth, K. Horne, T. Treu, B. J. Brewer, V. N. Bennert, G. Canalizo, E. L. Gates, W. Li, M. A. Malkan, D. Sand, T. Schmidt, S. Valenti, J. H. Woo, K. I. Clubb, M. C. Cooper, S. M. Crawford, S. F. Hönig, M. D. Joner, M. T. KandrashoffM. Lazarova, A. M. Nierenberg, E. Romero-Colmenero, D. Son, E. Tollerud, J. L. Walsh, H. Winkler

Physics & Physical Science

Research output: Contribution to journal › Article › peer-review

34 Scopus citations

Abstract

The Seyfert 1 galaxy Arp 151 was monitored as part of three reverberation mapping campaigns spanning 2008-2015. We present modeling of these velocity-resolved reverberation mapping data sets using a geometric and dynamical model for the broad-line region (BLR). By modeling each of the three data sets independently, we infer the evolution of the BLR structure in Arp 151 over a total of 7 yr and constrain the systematic uncertainties in nonvarying parameters such as the black hole mass. We find that the BLR geometry of a thick disk viewed close to face-on is stable over this time, although the size of the BLR grows by a factor of ∼2. The dynamics of the BLR are dominated by inflow, and the inferred black hole mass is consistent for the three data sets, despite the increase in BLR size. Combining the inference for the three data sets yields a black hole mass and statistical uncertainty of log₁₀(/) = with a standard deviation in individual measurements of 0.13 dex.

Original language	English (US)
Article number	108
Journal	Astrophysical Journal
Volume	856
Issue number	2
DOIs	https://doi.org/10.3847/1538-4357/aab3c6
State	Published - Apr 1 2018

Keywords

galaxies: active
galaxies: individual (Arp 151)
galaxies: nuclei
methods: statistical

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/1538-4357/aab3c6

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Pancoast, A., Barth, A. J., Horne, K., Treu, T., Brewer, B. J., Bennert, V. N., Canalizo, G., Gates, E. L., Li, W., Malkan, M. A., Sand, D., Schmidt, T., Valenti, S., Woo, J. H., Clubb, K. I., Cooper, M. C., Crawford, S. M., Hönig, S. F., Joner, M. D., ... Winkler, H. (2018). Stability of the Broad-line Region Geometry and Dynamics in Arp 151 over Seven Years. Astrophysical Journal, 856(2), Article 108. https://doi.org/10.3847/1538-4357/aab3c6

Pancoast, A, Barth, AJ, Horne, K, Treu, T, Brewer, BJ, Bennert, VN, Canalizo, G, Gates, EL, Li, W, Malkan, MA, Sand, D, Schmidt, T, Valenti, S, Woo, JH, Clubb, KI, Cooper, MC, Crawford, SM, Hönig, SF, Joner, MD, Kandrashoff, MT, Lazarova, M, Nierenberg, AM, Romero-Colmenero, E, Son, D, Tollerud, E, Walsh, JL & Winkler, H 2018, 'Stability of the Broad-line Region Geometry and Dynamics in Arp 151 over Seven Years', Astrophysical Journal, vol. 856, no. 2, 108. https://doi.org/10.3847/1538-4357/aab3c6

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title = "Stability of the Broad-line Region Geometry and Dynamics in Arp 151 over Seven Years",

abstract = "The Seyfert 1 galaxy Arp 151 was monitored as part of three reverberation mapping campaigns spanning 2008-2015. We present modeling of these velocity-resolved reverberation mapping data sets using a geometric and dynamical model for the broad-line region (BLR). By modeling each of the three data sets independently, we infer the evolution of the BLR structure in Arp 151 over a total of 7 yr and constrain the systematic uncertainties in nonvarying parameters such as the black hole mass. We find that the BLR geometry of a thick disk viewed close to face-on is stable over this time, although the size of the BLR grows by a factor of ∼2. The dynamics of the BLR are dominated by inflow, and the inferred black hole mass is consistent for the three data sets, despite the increase in BLR size. Combining the inference for the three data sets yields a black hole mass and statistical uncertainty of log10(/) = with a standard deviation in individual measurements of 0.13 dex.",

keywords = "galaxies: active, galaxies: individual (Arp 151), galaxies: nuclei, methods: statistical",

author = "A. Pancoast and Barth, {A. J.} and K. Horne and T. Treu and Brewer, {B. J.} and Bennert, {V. N.} and G. Canalizo and Gates, {E. L.} and W. Li and Malkan, {M. A.} and D. Sand and T. Schmidt and S. Valenti and Woo, {J. H.} and Clubb, {K. I.} and Cooper, {M. C.} and Crawford, {S. M.} and H{\"o}nig, {S. F.} and Joner, {M. D.} and Kandrashoff, {M. T.} and M. Lazarova and Nierenberg, {A. M.} and E. Romero-Colmenero and D. Son and E. Tollerud and Walsh, {J. L.} and H. Winkler",

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AU - Pancoast, A.

AU - Barth, A. J.

AU - Horne, K.

AU - Treu, T.

AU - Brewer, B. J.

AU - Bennert, V. N.

AU - Canalizo, G.

AU - Gates, E. L.

AU - Li, W.

AU - Malkan, M. A.

AU - Sand, D.

AU - Schmidt, T.

AU - Valenti, S.

AU - Woo, J. H.

AU - Clubb, K. I.

AU - Cooper, M. C.

AU - Crawford, S. M.

AU - Hönig, S. F.

AU - Joner, M. D.

AU - Kandrashoff, M. T.

AU - Lazarova, M.

AU - Nierenberg, A. M.

AU - Romero-Colmenero, E.

AU - Son, D.

AU - Tollerud, E.

AU - Walsh, J. L.

AU - Winkler, H.

PY - 2018/4/1

Y1 - 2018/4/1

N2 - The Seyfert 1 galaxy Arp 151 was monitored as part of three reverberation mapping campaigns spanning 2008-2015. We present modeling of these velocity-resolved reverberation mapping data sets using a geometric and dynamical model for the broad-line region (BLR). By modeling each of the three data sets independently, we infer the evolution of the BLR structure in Arp 151 over a total of 7 yr and constrain the systematic uncertainties in nonvarying parameters such as the black hole mass. We find that the BLR geometry of a thick disk viewed close to face-on is stable over this time, although the size of the BLR grows by a factor of ∼2. The dynamics of the BLR are dominated by inflow, and the inferred black hole mass is consistent for the three data sets, despite the increase in BLR size. Combining the inference for the three data sets yields a black hole mass and statistical uncertainty of log10(/) = with a standard deviation in individual measurements of 0.13 dex.

AB - The Seyfert 1 galaxy Arp 151 was monitored as part of three reverberation mapping campaigns spanning 2008-2015. We present modeling of these velocity-resolved reverberation mapping data sets using a geometric and dynamical model for the broad-line region (BLR). By modeling each of the three data sets independently, we infer the evolution of the BLR structure in Arp 151 over a total of 7 yr and constrain the systematic uncertainties in nonvarying parameters such as the black hole mass. We find that the BLR geometry of a thick disk viewed close to face-on is stable over this time, although the size of the BLR grows by a factor of ∼2. The dynamics of the BLR are dominated by inflow, and the inferred black hole mass is consistent for the three data sets, despite the increase in BLR size. Combining the inference for the three data sets yields a black hole mass and statistical uncertainty of log10(/) = with a standard deviation in individual measurements of 0.13 dex.

KW - galaxies: active

KW - galaxies: individual (Arp 151)

KW - galaxies: nuclei

KW - methods: statistical

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JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 108

ER -

Stability of the Broad-line Region Geometry and Dynamics in Arp 151 over Seven Years

Abstract

Keywords

ASJC Scopus subject areas

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