Space Telescope and Optical Reverberation Mapping Project. VIII. Time Variability of Emission and Absorption in NGC 5548 Based on Modeling the Ultraviolet Spectrum

Kriss, G.A.; De Rosa, G.; Ely, J.; Peterson, B.M.; Kaastra, J.; Mehdipour, M.; Ferland, G.J.; Dehghanian, M.; Mathur, S.; Edelson, R.; Korista, K.T.; Arav, N.; Barth, A.J.; Bentz, M.C.; Brandt, W.N.; Crenshaw, D.M.; Bontà, E. Dalla; Denney, K.D.; Done, C.; Eracleous, M.; Fausnaugh, M.M.; Gardner, E.; Goad, M.R.; Grier, C.J.; Horne, Keith; Kochanek, C.S.; McHardy, I.M.; Netzer, H.; Pancoast, A.; Pei, L.; Pogge, R.W.; Proga, D.; Silva, C.; Tejos, N.; Vestergaard, M.; Adams, S.M.; Anderson, M.D.; Arévalo, P.; Beatty, TG.; Behar, E.; Bennert, V.N.; Bianchi, S.; Bigley, A.; Bisogni, S.; Boissay-Malaquin, R.; Borman, G.A.; Bottorff, M.C.; Breeveld, A.A.; Brotherton, M.; Brown, J.E.; Brown, J.S.; Cackett, E.M.; Canalizo, G.; Cappi, M.; Carini, M.T.; Clubb, K.I.; Comerford, J.M.; Coker, C.T.; Corsini, E.M.; Costantini, E.; Croft, S.; Croxall, K.V.; Deason, A.J.; De Lorenzo-Cáceres, A.; De Marco, B.; Dietrich, M.; Di Gesu, L.; Ebrero, J.; Evans, P.A.; Filippenko, A.V.; Flatland, K.; Gates, E.L.; Gehrels, N.; Geier, S.; Gelbord, J.M.; Gonzalez, L.; Gorjian, V.; Grupe, D.; Gupta, A.; Hall, P.B.; Henderson, C.B.; Hicks, S.; Holmbeck, E.; Holoien, T.W.-S.; Hutchison, T.A.; Im, M.; Jensen, J.J.; Johnson, C.A.; Joner, M.D.; Kaspi, S.; Kelly, B.C.; Kelly, P.L.; Kennea, J.A.; Kim, M.; Kim, S.C.; Kim, S.Y.; King, A.; Klimanov, S.A.; Krongold, Y.; Lau, M.W.; Lee, J.C.; Leonard, D.C.; Li, Miao; Lira, P.; Lochhaas, C.; Ma, Zhiyuan; MacInnis, F.; Malkan, M.A.; Manne-Nicholas, E.R.; Matt, G.; Mauerhan, J.C.; McGurk, R.; 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.; Paltani, S.; Parks, J.R.; Pinto, C.; Pizzella, A.; Poleski, R.; Ponti, G.; Pott, J.-U.; Rafter, S.E.; Rix, H.-W.; Runnoe, J.; Saylor, D.A.; Schimoia, J.S.; Schnülle, K.; 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.; Teems, K.G.; Treu, T.; Turner, C.S.; Uttley, P.; Van Saders, J; Vican, L.; Villforth, C.; Villanueva Jr., S.; Walton, D.J.; Waters, T.; Weiss, Y.; Woo, J.-H.; Yan, H.; Yuk, H.; Zheng, W.; Zhu, W.; Zu, Y.

doi:10.3847/1538-4357/ab3049

Space Telescope and Optical Reverberation Mapping Project. VIII. Time Variability of Emission and Absorption in NGC 5548 Based on Modeling the Ultraviolet Spectrum

Kriss, G.A.; De Rosa, G.; Ely, J.; Peterson, B.M.; Kaastra, J.; Mehdipour, M.; Ferland, G.J.; Dehghanian, M.; Mathur, S.; Edelson, R.; Korista, K.T.; Arav, N.; Barth, A.J.; Bentz, M.C.; Brandt, W.N.; Crenshaw, D.M.; Bontà, E. Dalla; Denney, K.D.; Done, C.; Eracleous, M.; Fausnaugh, M.M.; Gardner, E.; Goad, M.R.; Grier, C.J.; Horne, Keith; Kochanek, C.S.; McHardy, I.M.; Netzer, H.; Pancoast, A.; Pei, L.; Pogge, R.W.; Proga, D.; Silva, C.; Tejos, N.; Vestergaard, M.; Adams, S.M.; Anderson, M.D.; Arévalo, P.; Beatty, TG.; Behar, E.; Bennert, V.N.; Bianchi, S.; Bigley, A.; Bisogni, S.; Boissay-Malaquin, R.; Borman, G.A.; Bottorff, M.C.; Breeveld, A.A.; Brotherton, M.; Brown, J.E.; Brown, J.S.; Cackett, E.M.; Canalizo, G.; Cappi, M.; Carini, M.T.; Clubb, K.I.; Comerford, J.M.; Coker, C.T.; Corsini, E.M.; Costantini, E.; Croft, S.; Croxall, K.V.; Deason, A.J.; De Lorenzo-Cáceres, A.; De Marco, B.; Dietrich, M.; Di Gesu, L.; Ebrero, J.; Evans, P.A.; Filippenko, A.V.; Flatland, K.; Gates, E.L....

Authors

G.A. Kriss

G. De Rosa

J. Ely

B.M. Peterson

J. Kaastra

M. Mehdipour

G.J. Ferland

M. Dehghanian

S. Mathur

R. Edelson

K.T. Korista

N. Arav

A.J. Barth

M.C. Bentz

W.N. Brandt

D.M. Crenshaw

E. Dalla Bontà

K.D. Denney

C. Done

M. Eracleous

M.M. Fausnaugh

E. Gardner

M.R. Goad

C.J. Grier

Keith Horne

C.S. Kochanek

I.M. McHardy

H. Netzer

A. Pancoast

L. Pei

R.W. Pogge

D. Proga

C. Silva

N. Tejos

M. Vestergaard

S.M. Adams

M.D. Anderson

P. Arévalo

TG. Beatty

E. Behar

V.N. Bennert

S. Bianchi

A. Bigley

S. Bisogni

R. Boissay-Malaquin

G.A. Borman

M.C. Bottorff

A.A. Breeveld

M. Brotherton

J.E. Brown

J.S. Brown

E.M. Cackett

G. Canalizo

M. Cappi

M.T. Carini

K.I. Clubb

J.M. Comerford

C.T. Coker

E.M. Corsini

E. Costantini

S. Croft

K.V. Croxall

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

A. De Lorenzo-Cáceres

B. De Marco

M. Dietrich

L. Di Gesu

J. Ebrero

P.A. Evans

A.V. Filippenko

K. Flatland

E.L. Gates

N. Gehrels

S. Geier

J.M. Gelbord

L. Gonzalez

V. Gorjian

D. Grupe

A. Gupta

P.B. Hall

C.B. Henderson

S. Hicks

E. Holmbeck

T.W.-S. Holoien

T.A. Hutchison

M. Im

J.J. Jensen

C.A. Johnson

M.D. Joner

S. Kaspi

B.C. Kelly

P.L. Kelly

J.A. Kennea

M. Kim

S.C. Kim

S.Y. Kim

A. King

S.A. Klimanov

Y. Krongold

M.W. Lau

J.C. Lee

D.C. Leonard

Miao Li

P. Lira

C. Lochhaas

Zhiyuan Ma

F. MacInnis

M.A. Malkan

E.R. Manne-Nicholas

G. Matt

J.C. Mauerhan

R. McGurk

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

S. Paltani

J.R. Parks

C. Pinto

A. Pizzella

R. Poleski

G. Ponti

J.-U. Pott

S.E. Rafter

H.-W. Rix

J. Runnoe

D.A. Saylor

J.S. Schimoia

K. Schnülle

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

K.G. Teems

T. Treu

C.S. Turner

P. Uttley

J Van Saders

L. Vican

C. Villforth

S. Villanueva Jr.

D.J. Walton

T. Waters

Y. Weiss

J.-H. Woo

H. Yan

H. Yuk

W. Zheng

W. Zhu

Y. Zu

Abstract

We model the ultraviolet spectra of the Seyfert 1 galaxy NGC 5548 obtained with the Hubble Space Telescope during the 6 month reverberation mapping campaign in 2014. Our model of the emission from NGC 5548 corrects for overlying absorption and deblends the individual emission lines. Using the modeled spectra, we measure the response to continuum variations for the deblended and absorption-corrected individual broad emission lines, the velocity-dependent profiles of Lyα and C iv, and the narrow and broad intrinsic absorption features. We find that the time lags for the corrected emission lines are comparable to those for the original data. The velocity-binned lag profiles of Lyα and C iv have a double-peaked structure indicative of a truncated Keplerian disk. The narrow absorption lines show a delayed response to continuum variations corresponding to recombination in gas with a density of ~105 cm−3. The high-ionization narrow absorption lines decorrelate from continuum variations during the same period as the broad emission lines. Analyzing the response of these absorption lines during this period shows that the ionizing flux is diminished in strength relative to the far-ultraviolet continuum. The broad absorption lines associated with the X-ray obscurer decrease in strength during this same time interval. The appearance of X-ray obscuration in ~2012 corresponds with an increase in the luminosity of NGC 5548 following an extended low state. We suggest that the obscurer is a disk wind triggered by the brightening of NGC 5548 following the decrease in size of the broad-line region during the preceding low-luminosity state.

Citation

Kriss, G., De Rosa, G., Ely, J., Peterson, B., Kaastra, J., Mehdipour, M., …Zu, Y. (2019). Space Telescope and Optical Reverberation Mapping Project. VIII. Time Variability of Emission and Absorption in NGC 5548 Based on Modeling the Ultraviolet Spectrum. Astrophysical Journal, 881(2), https://doi.org/10.3847/1538-4357/ab3049

Journal Article Type	Article
Acceptance Date	Jul 6, 2019
Online Publication Date	Aug 22, 2019
Publication Date	Aug 20, 2019
Deposit Date	Sep 13, 2019
Publicly Available Date	Sep 13, 2019
Journal	Astrophysical Journal
Print ISSN	0004-637X
Publisher	American Astronomical Society
Peer Reviewed	Peer Reviewed
Volume	881
Issue	2
DOI	https://doi.org/10.3847/1538-4357/ab3049

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