Space Telescope and Optical Reverberation Mapping Project. XII. Broad-line Region Modeling of NGC 5548

Williams, P.R.; Pancoast, A.; Treu, T.; Brewer, B.J.; Peterson, B.M.; Barth, A.J.; Malkan, M.A.; Rosa, G. De; Horne, Keith; Kriss, G.A.; Arav, N.; Bentz, M.C.; Cackett, E.M.; Bontà, E. Dalla; Dehghanian, M.; Done, C.; Ferland, G.J.; Grier, C.J.; Kaastra, J.; Kara, E.; Kochanek, C.S.; Mathur, S.; Mehdipour, M.; Pogge, R.W.; Proga, D.; Vestergaard, M.; Waters, T.; Adams, S.M.; Anderson, M.D.; Arévalo, P.; Beatty, T.G.; Bennert, V.N.; Bigley, A.; Bisogni, S.; Borman, G.A.; Boroson, T.A.; Bottorff, M.C.; Brandt, W.N.; Breeveld, A.A.; Brotherton, M.; Brown, J.E.; Brown, J.S.; Canalizo, G.; Carini, M.T.; Clubb, K.I.; Comerford, J.M.; Corsini, E.M.; Crenshaw, D.M.; Croft, S.; Croxall, K.V.; Deason, A.J.; Lorenzo-Cáceres, A. De; Denney, K.D.; Dietrich, M.; Edelson, R.; Efimova, N.V.; Ely, J.; Evans, P.A.; Fausnaugh, M.M.; Filippenko, A.V.; Flatland, K.; Fox, O.D.; Gardner, E.; Gates, E.L.; Gehrels, N.; Geier, S.; Gelbord, J.M.; Gonzalez, L.; Gorjian, V.; Greene, J.E.; Grupe, D.; Gupta, A.; Hall, P.B.; Henderson, C.B.; Hicks, S.; Holmbeck, E.; Holoien, T.W.-S.; Hutchison, T.; Im, M.; Jensen, J.J.; Johnson, C.A.; Joner, M.D.; Jones, J.; Kaspi, S.; Kelly, P.L.; Kennea, J.A.; Kim, M.; Kim, S.; Kim, S.C.; King, A.; Klimanov, S.A.; Knigge, C.; Krongold, Y.; Lau, M.W.; Lee, J.C.; Leonard, D.C.; Li, Miao; Lira, P.; Lochhaas, C.; Ma, Zhiyuan; MacInnis, F.; Manne-Nicholas, E.R.; Mauerhan, J.C.; McGurk, R.; McHardy, I.M.; Montuori, C.; Morelli, L.; Mosquera, A.; Mudd, D.; Müller–Sánchez, F.; Nazarov, S.V.; Norris, R.P.; Nousek, J.A.; Nguyen, M.L.; Ochner, P.; Okhmat, D.N.; Papadakis, I.; Parks, J.R.; Pei, L.; Penny, M.T.; Pizzella, A.; Poleski, R.; Pott, J.-U.; Rafter, S.E.; Rix, H.-W.; Runnoe, J.; Saylor, D.A.; Schimoia, J.S.; Scott, B.; Sergeev, S.G.; Shappee, B.J.; Shivvers, I.; Siegel, M.; Simonian, G.V.; Siviero, A.; Skielboe, A.; Somers, G.; Spencer, M.; Starkey, D.; Stevens, D.J.; Sung, H.-I.; Tayar, J.; Tejos, N.; Turner, C.S.; Uttley, P.; Van Saders, J; Vaughan, S.A.; Vican, L.; Villanueva, S.; Villforth, C.; Weiss, Y.; Woo, J.-H.; Yan, H.; Young, S.; Yuk, H.; Zheng, W.; Zhu, W.; Zu, Y.

doi:10.3847/1538-4357/abbad7

Space Telescope and Optical Reverberation Mapping Project. XII. Broad-line Region Modeling of NGC 5548

Williams, P.R.; Pancoast, A.; Treu, T.; Brewer, B.J.; Peterson, B.M.; Barth, A.J.; Malkan, M.A.; Rosa, G. De; Horne, Keith; Kriss, G.A.; Arav, N.; Bentz, M.C.; Cackett, E.M.; Bontà, E. Dalla; Dehghanian, M.; Done, C.; Ferland, G.J.; Grier, C.J.; Kaastra, J.; Kara, E.; Kochanek, C.S.; Mathur, S.; Mehdipour, M.; Pogge, R.W.; Proga, D.; Vestergaard, M.; Waters, T.; Adams, S.M.; Anderson, M.D.; Arévalo, P.; Beatty, T.G.; Bennert, V.N.; Bigley, A.; Bisogni, S.; Borman, G.A.; Boroson, T.A.; Bottorff, M.C.; Brandt, W.N.; Breeveld, A.A.; Brotherton, M.; Brown, J.E.; Brown, J.S.; Canalizo, G.; Carini, M.T.; Clubb, K.I.; Comerford, J.M.; Corsini, E.M.; Crenshaw, D.M.; Croft, S.; Croxall, K.V.; Deason, A.J.; Lorenzo-Cáceres, A. De; Denney, K.D.; Dietrich, M.; Edelson, R.; Efimova, N.V.; Ely, J.; Evans, P.A.; Fausnaugh, M.M.; Filippenko, A.V.; Flatland, K.; Fox, O.D.; Gardner, E.; Gates, E.L.; Gehrels, N.; Geier, S.; Gelbord, J.M.; Gonzalez, L.; Gorjian, V.; Greene, J.E.; Grupe, D.; Gupta, A.; Hal...

Authors

P.R. Williams

A. Pancoast

T. Treu

B.J. Brewer

B.M. Peterson

A.J. Barth

M.A. Malkan

G. De Rosa

Keith Horne

G.A. Kriss

N. Arav

M.C. Bentz

E.M. Cackett

E. Dalla Bontà

M. Dehghanian

Professor Christine Done chris.done@durham.ac.uk
Professor

G.J. Ferland

C.J. Grier

J. Kaastra

E. Kara

C.S. Kochanek

S. Mathur

M. Mehdipour

R.W. Pogge

D. Proga

M. Vestergaard

T. Waters

S.M. Adams

M.D. Anderson

P. Arévalo

T.G. Beatty

V.N. Bennert

A. Bigley

S. Bisogni

G.A. Borman

T.A. Boroson

M.C. Bottorff

W.N. Brandt

A.A. Breeveld

M. Brotherton

J.E. Brown

J.S. Brown

G. Canalizo

M.T. Carini

K.I. Clubb

J.M. Comerford

E.M. Corsini

D.M. Crenshaw

S. Croft

K.V. Croxall

Dr Alis Deason alis.j.deason@durham.ac.uk
Associate Professor

A. De Lorenzo-Cáceres

K.D. Denney

M. Dietrich

R. Edelson

N.V. Efimova

J. Ely

P.A. Evans

M.M. Fausnaugh

A.V. Filippenko

K. Flatland

O.D. Fox

E. Gardner

E.L. Gates

N. Gehrels

S. Geier

J.M. Gelbord

L. Gonzalez

V. Gorjian

J.E. Greene

D. Grupe

A. Gupta

P.B. Hall

C.B. Henderson

S. Hicks

E. Holmbeck

T.W.-S. Holoien

T. Hutchison

M. Im

J.J. Jensen

C.A. Johnson

M.D. Joner

J. Jones

S. Kaspi

P.L. Kelly

J.A. Kennea

M. Kim

S. Kim

S.C. Kim

A. King

S.A. Klimanov

C. Knigge

Y. Krongold

M.W. Lau

J.C. Lee

D.C. Leonard

Miao Li

P. Lira

C. Lochhaas

Zhiyuan Ma

F. MacInnis

E.R. Manne-Nicholas

J.C. Mauerhan

R. McGurk

I.M. McHardy

C. Montuori

L. Morelli

A. Mosquera

D. Mudd

F. Müller–Sánchez

S.V. Nazarov

R.P. Norris

J.A. Nousek

M.L. Nguyen

P. Ochner

D.N. Okhmat

I. Papadakis

J.R. Parks

L. Pei

M.T. Penny

A. Pizzella

R. Poleski

J.-U. Pott

S.E. Rafter

H.-W. Rix

J. Runnoe

D.A. Saylor

J.S. Schimoia

B. Scott

S.G. Sergeev

B.J. Shappee

I. Shivvers

M. Siegel

G.V. Simonian

A. Siviero

A. Skielboe

G. Somers

M. Spencer

D. Starkey

D.J. Stevens

H.-I. Sung

J. Tayar

N. Tejos

C.S. Turner

P. Uttley

J Van Saders

S.A. Vaughan

L. Vican

S. Villanueva

C. Villforth

Y. Weiss

J.-H. Woo

H. Yan

S. Young

H. Yuk

W. Zheng

W. Zhu

Y. Zu

Abstract

We present geometric and dynamical modeling of the broad line region (BLR) for the multi-wavelength reverberation mapping campaign focused on NGC 5548 in 2014. The data set includes photometric and spectroscopic monitoring in the optical and ultraviolet, covering the Hβ, C iv, and Lyα broad emission lines. We find an extended disk-like Hβ BLR with a mixture of near-circular and outflowing gas trajectories, while the C iv and Lyα BLRs are much less extended and resemble shell-like structures. There is clear radial structure in the BLR, with C iv and Lyα emission arising at smaller radii than the Hβ emission. Using the three lines, we make three independent black hole mass measurements, all of which are consistent. Combining these results gives a joint inference of ${\mathrm{log}}_{10}({M}_{\mathrm{BH}}/{M}_{\odot })={7.64}_{-0.18}^{+0.21}$. We examine the effect of using the V band instead of the UV continuum light curve on the results and find a size difference that is consistent with the measured UV–optical time lag, but the other structural and kinematic parameters remain unchanged, suggesting that the V band is a suitable proxy for the ionizing continuum when exploring the BLR structure and kinematics. Finally, we compare the Hβ results to similar models of data obtained in 2008 when the active galactic nucleus was at a lower luminosity state. We find that the size of the emitting region increased during this time period, but the geometry and black hole mass remained unchanged, which confirms that the BLR kinematics suitably gauge the gravitational field of the central black hole.

Citation

Williams, P., Pancoast, A., Treu, T., Brewer, B., Peterson, B., Barth, A., …Zu, Y. (2020). Space Telescope and Optical Reverberation Mapping Project. XII. Broad-line Region Modeling of NGC 5548. Astrophysical Journal, 902(1), Article 74. https://doi.org/10.3847/1538-4357/abbad7

Journal Article Type	Article
Acceptance Date	Sep 21, 2020
Online Publication Date	Oct 14, 2020
Publication Date	2020-10
Deposit Date	Nov 5, 2020
Publicly Available Date	Nov 5, 2020
Journal	Astrophysical Journal
Print ISSN	0004-637X
Publisher	American Astronomical Society
Peer Reviewed	Peer Reviewed
Volume	902
Issue	1
Article Number	74
DOI	https://doi.org/10.3847/1538-4357/abbad7