SPACE TELESCOPE and OPTICAL REVERBERATION MAPPING PROJECT.VI. REVERBERATING DISK MODELS for NGC 5548

D. Starkey; Keith Horne; M. M. Fausnaugh; B. M. Peterson; M. C. Bentz; C. S. Kochanek; K. D. Denney; R. Edelson; M. R. Goad; G. De Rosa; M. D. Anderson; P. Arévalo; A. J. Barth; C. Bazhaw; G. A. Borman; T. A. Boroson; M. C. Bottorff; W. N. Brandt; A. A. Breeveld; E. M. Cackett; M. T. Carini; K. V. Croxall; D. M. Crenshaw; Elena Dalla Bontà; A. De Lorenzo-Cáceres; M. Dietrich; N. V. Efimova; J. Ely; P. A. Evans; A. V. Filippenko; K. Flatland; N. Gehrels; S. Geier; J. M. Gelbord; L. Gonzalez; V. Gorjian; C. J. Grier; D. Grupe; P. B. Hall; S. Hicks; D. Horenstein; T. Hutchison; M. Im; J. J. Jensen; M. D. Joner; J. Jones; J. Kaastra; S. Kaspi; B. C. Kelly; J. A. Kennea; S. C. Kim; M. Kim; S. A. Klimanov; K. T. Korista; G. A. Kriss; J. C. Lee; D. C. Leonard; P. Lira; F. Macinnis; E. R. Manne-Nicholas; S. Mathur; I. M. McHardy; C. Montouri; R. Musso; S. V. Nazarov; R. P. Norris; J. A. Nousek; D. N. Okhmat; A. Pancoast; J. R. Parks; L. Pei; R. W. Pogge; J. U. Pott; S. E. Rafter; H. W. Rix; D. A. Saylor; J. S. Schimoia; K. Schnülle; S. G. Sergeev; M. H. Siegel; M. Spencer; H. I. Sung; K. G. Teems; C. S. Turner; P. Uttley; M. Vestergaard; C. Villforth; Y. Weiss; J. H. Woo; H. Yan; And S. Young; W. Zheng; Y. Zu

doi:10.3847/1538-4357/835/1/65

SPACE TELESCOPE and OPTICAL REVERBERATION MAPPING PROJECT.VI. REVERBERATING DISK MODELS for NGC 5548

D. Starkey, Keith Horne, M. M. Fausnaugh, B. M. Peterson, M. C. Bentz, C. S. Kochanek, K. D. Denney, R. Edelson, M. R. Goad, G. De Rosa, M. D. Anderson, P. Arévalo, A. J. Barth, C. Bazhaw, G. A. Borman, T. A. Boroson, M. C. Bottorff, W. N. Brandt, A. A. Breeveld, E. M. CackettM. T. Carini, K. V. Croxall, D. M. Crenshaw, Elena Dalla Bontà, A. De Lorenzo-Cáceres, M. Dietrich, N. V. Efimova, J. Ely, P. A. Evans, A. V. Filippenko, K. Flatland, N. Gehrels, S. Geier, J. M. Gelbord, L. Gonzalez, V. Gorjian, C. J. Grier, D. Grupe, P. B. Hall, S. Hicks, D. Horenstein, T. Hutchison, M. Im, J. J. Jensen, M. D. Joner, J. Jones, J. Kaastra, S. Kaspi, B. C. Kelly, J. A. Kennea, S. C. Kim, M. Kim, S. A. Klimanov, K. T. Korista, G. A. Kriss, J. C. Lee, D. C. Leonard, P. Lira, F. Macinnis, E. R. Manne-Nicholas, S. Mathur, I. M. McHardy, C. Montouri, R. Musso, S. V. Nazarov, R. P. Norris, J. A. Nousek, D. N. Okhmat, A. Pancoast, J. R. Parks, L. Pei, R. W. Pogge, J. U. Pott, S. E. Rafter, H. W. Rix, D. A. Saylor, J. S. Schimoia, K. Schnülle, S. G. Sergeev, M. H. Siegel, M. Spencer, H. I. Sung, K. G. Teems, C. S. Turner, P. Uttley, M. Vestergaard, C. Villforth, Y. Weiss, J. H. Woo, H. Yan, And S. Young, W. Zheng, Y. Zu

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Abstract

We conduct a multiwavelength continuum variability study of the Seyfert 1 galaxy NGC 5548 to investigate the temperature structure of its accretion disk. The 19 overlapping continuum light curves (1158 A oto 9157 A o) combine simultaneous Hubble Space Telescope, Swift, and ground-based observations over a 180 day period from 2014 January to July. Light-curve variability is interpreted as the reverberation response of the accretion disk to irradiation by a central time-varying point source. Our model yields the disk inclination i = 36° ±10° temperature T1 = 44 ±6 ) × 10 3 K at 1 light day from the black hole, and a temperatureradius slope (T ∞r-a) of a = 0.99 ±0.03. We also infer the driving light curve and find that it correlates poorly with both the hard and soft X-ray light curves, suggesting that the X-rays alone may not drive the ultraviolet and optical variability over the observing period. We also decompose the light curves into bright, faint, and mean accretion-disk spectra. These spectra lie below that expected for a standard blackbody accretion disk accreting at L LEdd = 0.1.

Original language	English (US)
Article number	65
Journal	Astrophysical Journal
Volume	835
Issue number	1
DOIs	https://doi.org/10.3847/1538-4357/835/1/65
State	Published - Jan 20 2017
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2017. The American Astronomical Society. All rights reserved.

Keywords

accretion, accretion disks
galaxies: active
galaxies: individual (NGC 5548)
galaxies: nuclei
galaxies: Seyfert

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10.3847/1538-4357/835/1/65

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Starkey, D., Horne, K., Fausnaugh, M. M., Peterson, B. M., Bentz, M. C., Kochanek, C. S., Denney, K. D., Edelson, R., Goad, M. R., Rosa, G. D., Anderson, M. D., Arévalo, P., Barth, A. J., Bazhaw, C., Borman, G. A., Boroson, T. A., Bottorff, M. C., Brandt, W. N., Breeveld, A. A., ... Zu, Y. (2017). SPACE TELESCOPE and OPTICAL REVERBERATION MAPPING PROJECT.VI. REVERBERATING DISK MODELS for NGC 5548. Astrophysical Journal, 835(1), Article 65. https://doi.org/10.3847/1538-4357/835/1/65

Starkey, D, Horne, K, Fausnaugh, MM, Peterson, BM, Bentz, MC, Kochanek, CS, Denney, KD, Edelson, R, Goad, MR, Rosa, GD, Anderson, MD, Arévalo, P, Barth, AJ, Bazhaw, C, Borman, GA, Boroson, TA, Bottorff, MC, Brandt, WN, Breeveld, AA, Cackett, EM, Carini, MT, Croxall, KV, Crenshaw, DM, Dalla Bontà, E, Lorenzo-Cáceres, AD, Dietrich, M, Efimova, NV, Ely, J, Evans, PA, Filippenko, AV, Flatland, K, Gehrels, N, Geier, S, Gelbord, JM, Gonzalez, L, Gorjian, V, Grier, CJ, Grupe, D, Hall, PB, Hicks, S, Horenstein, D, Hutchison, T, Im, M, Jensen, JJ, Joner, MD, Jones, J, Kaastra, J, Kaspi, S, Kelly, BC, Kennea, JA, Kim, SC, Kim, M, Klimanov, SA, Korista, KT, Kriss, GA, Lee, JC, Leonard, DC, Lira, P, Macinnis, F, Manne-Nicholas, ER, Mathur, S, McHardy, IM, Montouri, C, Musso, R, Nazarov, SV, Norris, RP, Nousek, JA, Okhmat, DN, Pancoast, A, Parks, JR, Pei, L, Pogge, RW, Pott, JU, Rafter, SE, Rix, HW, Saylor, DA, Schimoia, JS, Schnülle, K, Sergeev, SG, Siegel, MH, Spencer, M, Sung, HI, Teems, KG, Turner, CS, Uttley, P, Vestergaard, M, Villforth, C, Weiss, Y, Woo, JH, Yan, H, Young, AS, Zheng, W & Zu, Y 2017, 'SPACE TELESCOPE and OPTICAL REVERBERATION MAPPING PROJECT.VI. REVERBERATING DISK MODELS for NGC 5548', Astrophysical Journal, vol. 835, no. 1, 65. https://doi.org/10.3847/1538-4357/835/1/65

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title = "SPACE TELESCOPE and OPTICAL REVERBERATION MAPPING PROJECT.VI. REVERBERATING DISK MODELS for NGC 5548",

abstract = "We conduct a multiwavelength continuum variability study of the Seyfert 1 galaxy NGC 5548 to investigate the temperature structure of its accretion disk. The 19 overlapping continuum light curves (1158 A oto 9157 A o) combine simultaneous Hubble Space Telescope, Swift, and ground-based observations over a 180 day period from 2014 January to July. Light-curve variability is interpreted as the reverberation response of the accretion disk to irradiation by a central time-varying point source. Our model yields the disk inclination i = 36° ±10° temperature T1 = 44 ±6 ) × 10 3 K at 1 light day from the black hole, and a temperatureradius slope (T ∞r-a) of a = 0.99 ±0.03. We also infer the driving light curve and find that it correlates poorly with both the hard and soft X-ray light curves, suggesting that the X-rays alone may not drive the ultraviolet and optical variability over the observing period. We also decompose the light curves into bright, faint, and mean accretion-disk spectra. These spectra lie below that expected for a standard blackbody accretion disk accreting at L LEdd = 0.1.",

keywords = "accretion, accretion disks, galaxies: active, galaxies: individual (NGC 5548), galaxies: nuclei, galaxies: Seyfert",

author = "D. Starkey and Keith Horne and Fausnaugh, {M. M.} and Peterson, {B. M.} and Bentz, {M. C.} and Kochanek, {C. S.} and Denney, {K. D.} and R. Edelson and Goad, {M. R.} and Rosa, {G. De} and Anderson, {M. D.} and P. Ar{\'e}valo and Barth, {A. J.} and C. Bazhaw and Borman, {G. A.} and Boroson, {T. A.} and Bottorff, {M. C.} and Brandt, {W. N.} and Breeveld, {A. A.} and Cackett, {E. M.} and Carini, {M. T.} and Croxall, {K. V.} and Crenshaw, {D. M.} and {Dalla Bont{\`a}}, Elena and Lorenzo-C{\'a}ceres, {A. De} and M. Dietrich and Efimova, {N. V.} and J. Ely and Evans, {P. A.} and Filippenko, {A. V.} and K. Flatland and N. Gehrels and S. Geier and Gelbord, {J. M.} and L. Gonzalez and V. Gorjian and Grier, {C. J.} and D. Grupe and Hall, {P. B.} and S. Hicks and D. Horenstein and T. Hutchison and M. Im and Jensen, {J. J.} and Joner, {M. D.} and J. Jones and J. Kaastra and S. Kaspi and Kelly, {B. C.} and Kennea, {J. A.} and Kim, {S. C.} and M. Kim and Klimanov, {S. A.} and Korista, {K. T.} and Kriss, {G. A.} and Lee, {J. C.} and Leonard, {D. C.} and P. Lira and F. Macinnis and Manne-Nicholas, {E. R.} and S. Mathur and McHardy, {I. M.} and C. Montouri and R. Musso and Nazarov, {S. V.} and Norris, {R. P.} and Nousek, {J. A.} and Okhmat, {D. N.} and A. Pancoast and Parks, {J. R.} and L. Pei and Pogge, {R. W.} and Pott, {J. U.} and Rafter, {S. E.} and Rix, {H. W.} and Saylor, {D. A.} and Schimoia, {J. S.} and K. Schn{\"u}lle and Sergeev, {S. G.} and Siegel, {M. H.} and M. Spencer and Sung, {H. I.} and Teems, {K. G.} and Turner, {C. S.} and P. Uttley and M. Vestergaard and C. Villforth and Y. Weiss and Woo, {J. H.} and H. Yan and Young, {And S.} and W. Zheng and Y. Zu",

year = "2017",

month = jan,

day = "20",

doi = "10.3847/1538-4357/835/1/65",

language = "English (US)",

volume = "835",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing Ltd.",

number = "1",

}

TY - JOUR

T1 - SPACE TELESCOPE and OPTICAL REVERBERATION MAPPING PROJECT.VI. REVERBERATING DISK MODELS for NGC 5548

AU - Starkey, D.

AU - Horne, Keith

AU - Fausnaugh, M. M.

AU - Peterson, B. M.

AU - Bentz, M. C.

AU - Kochanek, C. S.

AU - Denney, K. D.

AU - Edelson, R.

AU - Goad, M. R.

AU - Rosa, G. De

AU - Anderson, M. D.

AU - Arévalo, P.

AU - Barth, A. J.

AU - Bazhaw, C.

AU - Borman, G. A.

AU - Boroson, T. A.

AU - Bottorff, M. C.

AU - Brandt, W. N.

AU - Breeveld, A. A.

AU - Cackett, E. M.

AU - Carini, M. T.

AU - Croxall, K. V.

AU - Crenshaw, D. M.

AU - Dalla Bontà, Elena

AU - Lorenzo-Cáceres, A. De

AU - Dietrich, M.

AU - Efimova, N. V.

AU - Ely, J.

AU - Evans, P. A.

AU - Filippenko, A. V.

AU - Flatland, K.

AU - Gehrels, N.

AU - Geier, S.

AU - Gelbord, J. M.

AU - Gonzalez, L.

AU - Gorjian, V.

AU - Grier, C. J.

AU - Grupe, D.

AU - Hall, P. B.

AU - Hicks, S.

AU - Horenstein, D.

AU - Hutchison, T.

AU - Im, M.

AU - Jensen, J. J.

AU - Joner, M. D.

AU - Jones, J.

AU - Kaastra, J.

AU - Kaspi, S.

AU - Kelly, B. C.

AU - Kennea, J. A.

AU - Kim, S. C.

AU - Kim, M.

AU - Klimanov, S. A.

AU - Korista, K. T.

AU - Kriss, G. A.

AU - Lee, J. C.

AU - Leonard, D. C.

AU - Lira, P.

AU - Macinnis, F.

AU - Manne-Nicholas, E. R.

AU - Mathur, S.

AU - McHardy, I. M.

AU - Montouri, C.

AU - Musso, R.

AU - Nazarov, S. V.

AU - Norris, R. P.

AU - Nousek, J. A.

AU - Okhmat, D. N.

AU - Pancoast, A.

AU - Parks, J. R.

AU - Pei, L.

AU - Pogge, R. W.

AU - Pott, J. U.

AU - Rafter, S. E.

AU - Rix, H. W.

AU - Saylor, D. A.

AU - Schimoia, J. S.

AU - Schnülle, K.

AU - Sergeev, S. G.

AU - Siegel, M. H.

AU - Spencer, M.

AU - Sung, H. I.

AU - Teems, K. G.

AU - Turner, C. S.

AU - Uttley, P.

AU - Vestergaard, M.

AU - Villforth, C.

AU - Weiss, Y.

AU - Woo, J. H.

AU - Yan, H.

AU - Young, And S.

AU - Zheng, W.

AU - Zu, Y.

PY - 2017/1/20

Y1 - 2017/1/20

N2 - We conduct a multiwavelength continuum variability study of the Seyfert 1 galaxy NGC 5548 to investigate the temperature structure of its accretion disk. The 19 overlapping continuum light curves (1158 A oto 9157 A o) combine simultaneous Hubble Space Telescope, Swift, and ground-based observations over a 180 day period from 2014 January to July. Light-curve variability is interpreted as the reverberation response of the accretion disk to irradiation by a central time-varying point source. Our model yields the disk inclination i = 36° ±10° temperature T1 = 44 ±6 ) × 10 3 K at 1 light day from the black hole, and a temperatureradius slope (T ∞r-a) of a = 0.99 ±0.03. We also infer the driving light curve and find that it correlates poorly with both the hard and soft X-ray light curves, suggesting that the X-rays alone may not drive the ultraviolet and optical variability over the observing period. We also decompose the light curves into bright, faint, and mean accretion-disk spectra. These spectra lie below that expected for a standard blackbody accretion disk accreting at L LEdd = 0.1.

AB - We conduct a multiwavelength continuum variability study of the Seyfert 1 galaxy NGC 5548 to investigate the temperature structure of its accretion disk. The 19 overlapping continuum light curves (1158 A oto 9157 A o) combine simultaneous Hubble Space Telescope, Swift, and ground-based observations over a 180 day period from 2014 January to July. Light-curve variability is interpreted as the reverberation response of the accretion disk to irradiation by a central time-varying point source. Our model yields the disk inclination i = 36° ±10° temperature T1 = 44 ±6 ) × 10 3 K at 1 light day from the black hole, and a temperatureradius slope (T ∞r-a) of a = 0.99 ±0.03. We also infer the driving light curve and find that it correlates poorly with both the hard and soft X-ray light curves, suggesting that the X-rays alone may not drive the ultraviolet and optical variability over the observing period. We also decompose the light curves into bright, faint, and mean accretion-disk spectra. These spectra lie below that expected for a standard blackbody accretion disk accreting at L LEdd = 0.1.

KW - accretion, accretion disks

KW - galaxies: active

KW - galaxies: individual (NGC 5548)

KW - galaxies: nuclei

KW - galaxies: Seyfert

UR - http://www.scopus.com/inward/record.url?scp=85011262969&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85011262969&partnerID=8YFLogxK

U2 - 10.3847/1538-4357/835/1/65

DO - 10.3847/1538-4357/835/1/65

M3 - Article

AN - SCOPUS:85011262969

SN - 0004-637X

VL - 835

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 65

ER -

SPACE TELESCOPE and OPTICAL REVERBERATION MAPPING PROJECT.VI. REVERBERATING DISK MODELS for NGC 5548

Abstract

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