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

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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.; Arav, N.; Barth, A. J.; Bentz, M. C.; Brandt, W. N.; Crenshaw, D. M.; Dalla Bonta, E.; Denney, K. D.; Done, C.; Vestergaard, M.; Adams, S. M.; Anderson, M. D.; 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.; 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.; Runnoe, J.; Saylor, D. A.; Schimoia, J. S.; Schnuelle, K.; Skielboe, A.; Somers, G.; Spencer, M.; Starkey, D.; Stevens, D. J.; Villanueva, S., Jr.; Walton, D. J.

In: Astrophysical Journal, Vol. 881, No. 2, 153, 20.08.2019.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Kriss, GA, De Rosa, G, Ely, J, Peterson, BM, Kaastra, J, Mehdipour, M, Ferland, GJ, Dehghanian, M, Mathur, S, Edelson, R, Arav, N, Barth, AJ, Bentz, MC, Brandt, WN, Crenshaw, DM, Dalla Bonta, E, Denney, KD, Done, C, Vestergaard, M, Adams, SM, Anderson, MD, Cackett, EM, Canalizo, G, Cappi, M, Carini, MT, Clubb, KI, Comerford, JM, Coker, CT, Corsini, EM, Costantini, E, Croft, S, Croxall, KV, Deason, AJ, Gorjian, V, Grupe, D, Gupta, A, Hall, PB, Henderson, CB, Hicks, S, Holmbeck, E, Holoien, TW-S, Hutchison, TA, Im, M, Jensen, JJ, Johnson, CA, Joner, MD, Kaspi, S, Kelly, BC, Kelly, PL, Kennea, JA, Kim, M, Kim, SC, Kim, SY, King, A, Klimanov, SA, Krongold, Y, Runnoe, J, Saylor, DA, Schimoia, JS, Schnuelle, K, Skielboe, A, Somers, G, Spencer, M, Starkey, D, Stevens, DJ, Villanueva, SJ & Walton, DJ 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, vol. 881, no. 2, 153. https://doi.org/10.3847/1538-4357/ab3049

APA

Kriss, G. A., De Rosa, G., Ely, J., Peterson, B. M., Kaastra, J., Mehdipour, M., Ferland, G. J., Dehghanian, M., Mathur, S., Edelson, R., Arav, N., Barth, A. J., Bentz, M. C., Brandt, W. N., Crenshaw, D. M., Dalla Bonta, E., Denney, K. D., Done, C., Vestergaard, M., ... Walton, D. J. (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), [153]. https://doi.org/10.3847/1538-4357/ab3049

Vancouver

Kriss GA, De Rosa G, Ely J, Peterson BM, Kaastra J, Mehdipour M et al. 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. 2019 Aug 20;881(2). 153. https://doi.org/10.3847/1538-4357/ab3049

Author

Kriss, G. A. ; De Rosa, G. ; Ely, J. ; Peterson, B. M. ; Kaastra, J. ; Mehdipour, M. ; Ferland, G. J. ; Dehghanian, M. ; Mathur, S. ; Edelson, R. ; Arav, N. ; Barth, A. J. ; Bentz, M. C. ; Brandt, W. N. ; Crenshaw, D. M. ; Dalla Bonta, E. ; Denney, K. D. ; Done, C. ; Vestergaard, M. ; Adams, S. M. ; Anderson, M. D. ; 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. ; 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. ; Runnoe, J. ; Saylor, D. A. ; Schimoia, J. S. ; Schnuelle, K. ; Skielboe, A. ; Somers, G. ; Spencer, M. ; Starkey, D. ; Stevens, D. J. ; Villanueva, S., Jr. ; Walton, D. J. / Space Telescope and Optical Reverberation Mapping Project. VIII. Time Variability of Emission and Absorption in NGC 5548 Based on Modeling the Ultraviolet Spectrum. In: Astrophysical Journal. 2019 ; Vol. 881, No. 2.

Bibtex

@article{3643665d98134889a292b3b88b5e0abd,
title = "Space Telescope and Optical Reverberation Mapping Project. VIII. Time Variability of Emission and Absorption in NGC 5548 Based on Modeling the Ultraviolet Spectrum",
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 Ly 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 Ly 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.",
keywords = "galaxies: active, galaxies: individual (NGC 5548), galaxies: nuclei, galaxies: Seyfert",
author = "Kriss, {G. A.} and {De Rosa}, G. and J. Ely and Peterson, {B. M.} and J. Kaastra and M. Mehdipour and Ferland, {G. J.} and M. Dehghanian and S. Mathur and R. Edelson and N. Arav and Barth, {A. J.} and Bentz, {M. C.} and Brandt, {W. N.} and Crenshaw, {D. M.} and {Dalla Bonta}, E. and Denney, {K. D.} and C. Done and M. Vestergaard and Adams, {S. M.} and Anderson, {M. D.} and Cackett, {E. M.} and G. Canalizo and M. Cappi and Carini, {M. T.} and Clubb, {K., I} and Comerford, {J. M.} and Coker, {C. T.} and Corsini, {E. M.} and E. Costantini and S. Croft and Croxall, {K., V} and Deason, {A. J.} and V Gorjian and D. Grupe and A. Gupta and Hall, {P. B.} and Henderson, {C. B.} and S. Hicks and E. Holmbeck and Holoien, {T. W-S} and Hutchison, {T. A.} and M. Im and Jensen, {J. J.} and Johnson, {C. A.} and Joner, {M. D.} and S. Kaspi and Kelly, {B. C.} and Kelly, {P. L.} and Kennea, {J. A.} and M. Kim and Kim, {S. C.} and Kim, {S. Y.} and A. King and Klimanov, {S. A.} and Y. Krongold and J. Runnoe and Saylor, {D. A.} and Schimoia, {J. S.} and K. Schnuelle and A. Skielboe and G. Somers and M. Spencer and D. Starkey and Stevens, {D. J.} and Villanueva, {S., Jr.} and Walton, {D. J.}",
year = "2019",
month = aug,
day = "20",
doi = "10.3847/1538-4357/ab3049",
language = "English",
volume = "881",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "Institute of Physics Publishing, Inc",
number = "2",

}

RIS

TY - JOUR

T1 - Space Telescope and Optical Reverberation Mapping Project. VIII. Time Variability of Emission and Absorption in NGC 5548 Based on Modeling the Ultraviolet Spectrum

AU - Kriss, G. A.

AU - De Rosa, G.

AU - Ely, J.

AU - Peterson, B. M.

AU - Kaastra, J.

AU - Mehdipour, M.

AU - Ferland, G. J.

AU - Dehghanian, M.

AU - Mathur, S.

AU - Edelson, R.

AU - Arav, N.

AU - Barth, A. J.

AU - Bentz, M. C.

AU - Brandt, W. N.

AU - Crenshaw, D. M.

AU - Dalla Bonta, E.

AU - Denney, K. D.

AU - Done, C.

AU - Vestergaard, M.

AU - Adams, S. M.

AU - Anderson, M. D.

AU - Cackett, E. M.

AU - Canalizo, G.

AU - Cappi, M.

AU - Carini, M. T.

AU - Clubb, K., I

AU - Comerford, J. M.

AU - Coker, C. T.

AU - Corsini, E. M.

AU - Costantini, E.

AU - Croft, S.

AU - Croxall, K., V

AU - Deason, A. J.

AU - Gorjian, V

AU - Grupe, D.

AU - Gupta, A.

AU - Hall, P. B.

AU - Henderson, C. B.

AU - Hicks, S.

AU - Holmbeck, E.

AU - Holoien, T. W-S

AU - Hutchison, T. A.

AU - Im, M.

AU - Jensen, J. J.

AU - Johnson, C. A.

AU - Joner, M. D.

AU - Kaspi, S.

AU - Kelly, B. C.

AU - Kelly, P. L.

AU - Kennea, J. A.

AU - Kim, M.

AU - Kim, S. C.

AU - Kim, S. Y.

AU - King, A.

AU - Klimanov, S. A.

AU - Krongold, Y.

AU - Runnoe, J.

AU - Saylor, D. A.

AU - Schimoia, J. S.

AU - Schnuelle, K.

AU - Skielboe, A.

AU - Somers, G.

AU - Spencer, M.

AU - Starkey, D.

AU - Stevens, D. J.

AU - Villanueva, S., Jr.

AU - Walton, D. J.

PY - 2019/8/20

Y1 - 2019/8/20

N2 - 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 Ly 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 Ly 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.

AB - 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 Ly 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 Ly 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.

KW - galaxies: active

KW - galaxies: individual (NGC 5548)

KW - galaxies: nuclei

KW - galaxies: Seyfert

U2 - 10.3847/1538-4357/ab3049

DO - 10.3847/1538-4357/ab3049

M3 - Journal article

VL - 881

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 153

ER -

ID: 227191046