Space Telescope and Optical Reverberation Mapping Project. XI. Disk-wind Characteristics and Contributions to the Very Broad Emission Lines of NGC 5548

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

Standard

Space Telescope and Optical Reverberation Mapping Project. XI. Disk-wind Characteristics and Contributions to the Very Broad Emission Lines of NGC 5548. / Dehghanian, M.; Ferland, G. J.; Kriss, G. A.; Peterson, B. M.; Korista, K. T.; Goad, M. R.; Chatzikos, M.; Guzman, F.; de Rosa, G.; Mehdipour, M.; Kaastra, J.; Mathur, S.; Vestergaard, M.; Proga, D.; Waters, T.; Bentz, M. C.; Bisogni, S.; Brandt, W. N.; Dalla Bonta, E.; Fausnaugh, M. M.; Gelbord, J. M.; Horne, Keith; McHardy, I. M.; Pogge, R. W.; Starkey, D. A.

In: Astrophysical Journal, Vol. 898, No. 2, 141, 08.2020.

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

Harvard

Dehghanian, M, Ferland, GJ, Kriss, GA, Peterson, BM, Korista, KT, Goad, MR, Chatzikos, M, Guzman, F, de Rosa, G, Mehdipour, M, Kaastra, J, Mathur, S, Vestergaard, M, Proga, D, Waters, T, Bentz, MC, Bisogni, S, Brandt, WN, Dalla Bonta, E, Fausnaugh, MM, Gelbord, JM, Horne, K, McHardy, IM, Pogge, RW & Starkey, DA 2020, 'Space Telescope and Optical Reverberation Mapping Project. XI. Disk-wind Characteristics and Contributions to the Very Broad Emission Lines of NGC 5548', Astrophysical Journal, vol. 898, no. 2, 141. https://doi.org/10.3847/1538-4357/ab9cb2

APA

Dehghanian, M., Ferland, G. J., Kriss, G. A., Peterson, B. M., Korista, K. T., Goad, M. R., Chatzikos, M., Guzman, F., de Rosa, G., Mehdipour, M., Kaastra, J., Mathur, S., Vestergaard, M., Proga, D., Waters, T., Bentz, M. C., Bisogni, S., Brandt, W. N., Dalla Bonta, E., ... Starkey, D. A. (2020). Space Telescope and Optical Reverberation Mapping Project. XI. Disk-wind Characteristics and Contributions to the Very Broad Emission Lines of NGC 5548. Astrophysical Journal, 898(2), [141]. https://doi.org/10.3847/1538-4357/ab9cb2

Vancouver

Dehghanian M, Ferland GJ, Kriss GA, Peterson BM, Korista KT, Goad MR et al. Space Telescope and Optical Reverberation Mapping Project. XI. Disk-wind Characteristics and Contributions to the Very Broad Emission Lines of NGC 5548. Astrophysical Journal. 2020 Aug;898(2). 141. https://doi.org/10.3847/1538-4357/ab9cb2

Author

Dehghanian, M. ; Ferland, G. J. ; Kriss, G. A. ; Peterson, B. M. ; Korista, K. T. ; Goad, M. R. ; Chatzikos, M. ; Guzman, F. ; de Rosa, G. ; Mehdipour, M. ; Kaastra, J. ; Mathur, S. ; Vestergaard, M. ; Proga, D. ; Waters, T. ; Bentz, M. C. ; Bisogni, S. ; Brandt, W. N. ; Dalla Bonta, E. ; Fausnaugh, M. M. ; Gelbord, J. M. ; Horne, Keith ; McHardy, I. M. ; Pogge, R. W. ; Starkey, D. A. / Space Telescope and Optical Reverberation Mapping Project. XI. Disk-wind Characteristics and Contributions to the Very Broad Emission Lines of NGC 5548. In: Astrophysical Journal. 2020 ; Vol. 898, No. 2.

Bibtex

@article{d3b965f71905405f8a434235ede9a21d,
title = "Space Telescope and Optical Reverberation Mapping Project. XI. Disk-wind Characteristics and Contributions to the Very Broad Emission Lines of NGC 5548",
abstract = "In 2014 the NGC 5548 Space Telescope and Optical Reverberation Mapping campaign discovered a two-month anomaly when variations in the absorption and emission lines decorrelated from continuum variations. During this time the soft X-ray part of the intrinsic spectrum had been strongly absorbed by a line-of-sight (LOS) obscurer, which was interpreted as the upper part of a disk wind. Our first paper showed that changes in the LOS obscurer produces the decorrelation between the absorption lines and the continuum. A second study showed that the base of the wind shields the broad emission-line region (BLR), leading to the emission-line decorrelation. In that study, we proposed the wind is normally transparent with no effect on the spectrum. Changes in the wind properties alter its shielding and affect the spectral energy distribution (SED) striking the BLR, producing the observed decorrelations. In this work we investigate the impact of a translucent wind on the emission lines. We simulate the obscuration using XMM-Newton, NuSTAR, and Hubble Space Telescope observations to determine the physical characteristics of the wind. We find that a translucent wind can contribute a part of the Heiiand Fe K alpha emission. It has a modest optical depth to electron scattering, which explains the fainter far-side emission in the observed velocity-delay maps. The wind produces the very broad base seen in the UV emission lines and may also be present in the Fe K alpha line. Our results highlight the importance of accounting for the effects of such winds in the analysis of the physics of the central engine.",
keywords = "Seyfert galaxies, Active galaxies, Active galactic nuclei, ACTIVE GALACTIC NUCLEI, BLACK-HOLE, SPECTRA, CLOUDS",
author = "M. Dehghanian and Ferland, {G. J.} and Kriss, {G. A.} and Peterson, {B. M.} and Korista, {K. T.} and Goad, {M. R.} and M. Chatzikos and F. Guzman and {de Rosa}, G. and M. Mehdipour and J. Kaastra and S. Mathur and M. Vestergaard and D. Proga and T. Waters and Bentz, {M. C.} and S. Bisogni and Brandt, {W. N.} and {Dalla Bonta}, E. and Fausnaugh, {M. M.} and Gelbord, {J. M.} and Keith Horne and McHardy, {I. M.} and Pogge, {R. W.} and Starkey, {D. A.}",
year = "2020",
month = aug,
doi = "10.3847/1538-4357/ab9cb2",
language = "English",
volume = "898",
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. XI. Disk-wind Characteristics and Contributions to the Very Broad Emission Lines of NGC 5548

AU - Dehghanian, M.

AU - Ferland, G. J.

AU - Kriss, G. A.

AU - Peterson, B. M.

AU - Korista, K. T.

AU - Goad, M. R.

AU - Chatzikos, M.

AU - Guzman, F.

AU - de Rosa, G.

AU - Mehdipour, M.

AU - Kaastra, J.

AU - Mathur, S.

AU - Vestergaard, M.

AU - Proga, D.

AU - Waters, T.

AU - Bentz, M. C.

AU - Bisogni, S.

AU - Brandt, W. N.

AU - Dalla Bonta, E.

AU - Fausnaugh, M. M.

AU - Gelbord, J. M.

AU - Horne, Keith

AU - McHardy, I. M.

AU - Pogge, R. W.

AU - Starkey, D. A.

PY - 2020/8

Y1 - 2020/8

N2 - In 2014 the NGC 5548 Space Telescope and Optical Reverberation Mapping campaign discovered a two-month anomaly when variations in the absorption and emission lines decorrelated from continuum variations. During this time the soft X-ray part of the intrinsic spectrum had been strongly absorbed by a line-of-sight (LOS) obscurer, which was interpreted as the upper part of a disk wind. Our first paper showed that changes in the LOS obscurer produces the decorrelation between the absorption lines and the continuum. A second study showed that the base of the wind shields the broad emission-line region (BLR), leading to the emission-line decorrelation. In that study, we proposed the wind is normally transparent with no effect on the spectrum. Changes in the wind properties alter its shielding and affect the spectral energy distribution (SED) striking the BLR, producing the observed decorrelations. In this work we investigate the impact of a translucent wind on the emission lines. We simulate the obscuration using XMM-Newton, NuSTAR, and Hubble Space Telescope observations to determine the physical characteristics of the wind. We find that a translucent wind can contribute a part of the Heiiand Fe K alpha emission. It has a modest optical depth to electron scattering, which explains the fainter far-side emission in the observed velocity-delay maps. The wind produces the very broad base seen in the UV emission lines and may also be present in the Fe K alpha line. Our results highlight the importance of accounting for the effects of such winds in the analysis of the physics of the central engine.

AB - In 2014 the NGC 5548 Space Telescope and Optical Reverberation Mapping campaign discovered a two-month anomaly when variations in the absorption and emission lines decorrelated from continuum variations. During this time the soft X-ray part of the intrinsic spectrum had been strongly absorbed by a line-of-sight (LOS) obscurer, which was interpreted as the upper part of a disk wind. Our first paper showed that changes in the LOS obscurer produces the decorrelation between the absorption lines and the continuum. A second study showed that the base of the wind shields the broad emission-line region (BLR), leading to the emission-line decorrelation. In that study, we proposed the wind is normally transparent with no effect on the spectrum. Changes in the wind properties alter its shielding and affect the spectral energy distribution (SED) striking the BLR, producing the observed decorrelations. In this work we investigate the impact of a translucent wind on the emission lines. We simulate the obscuration using XMM-Newton, NuSTAR, and Hubble Space Telescope observations to determine the physical characteristics of the wind. We find that a translucent wind can contribute a part of the Heiiand Fe K alpha emission. It has a modest optical depth to electron scattering, which explains the fainter far-side emission in the observed velocity-delay maps. The wind produces the very broad base seen in the UV emission lines and may also be present in the Fe K alpha line. Our results highlight the importance of accounting for the effects of such winds in the analysis of the physics of the central engine.

KW - Seyfert galaxies

KW - Active galaxies

KW - Active galactic nuclei

KW - ACTIVE GALACTIC NUCLEI

KW - BLACK-HOLE

KW - SPECTRA

KW - CLOUDS

U2 - 10.3847/1538-4357/ab9cb2

DO - 10.3847/1538-4357/ab9cb2

M3 - Journal article

VL - 898

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 141

ER -

ID: 247541896