Space Telescope and Optical Reverberation Mapping Project. XI. Disk-wind Characteristics and Contributions to the Very Broad Emission Lines of NGC 5548
The Astrophysical Journal, vol. 898, pp. 141
Abstract
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 He ii and Fe Kα 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 Kα line. Our results highlight the importance of accounting for the effects of such winds in the analysis of the physics of the central engine.
Authors 24
-
Affiliation as printed
Department of Physics and Astronomy, The University of Kentucky, Lexington, KY 40506, USA
-
Affiliation as printed
Department of Physics and Astronomy, The University of Kentucky, Lexington, KY 40506, USA
-
Space Telescope Science Institute
Affiliation as printed
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
-
Space Telescope Science Institute · The Ohio State University
Affiliation as printed
Center for Cosmology and AstroParticle Physics, The Ohio State University, 191 West Woodruff Avenue, Columbus, OH 43210, USA
Department of Astronomy, The Ohio State University, 140 W 18th Avenue, Columbus, OH 43210, USA
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
-
Affiliation as printed
Department of Physics, Western Michigan University, 1120 Everett Tower, Kalamazoo, MI 49008-5252, USA
-
Affiliation as printed
Department of Physics and Astronomy, University of Leicester, University Road, Leicester, LE1 7RH, UK
-
Affiliation as printed
Department of Physics and Astronomy, The University of Kentucky, Lexington, KY 40506, USA
-
Affiliation as printed
Department of Physics and Astronomy, The University of Kentucky, Lexington, KY 40506, USA
-
Space Telescope Science Institute
Affiliation as printed
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
-
Space Research Organisation Netherlands
Affiliation as printed
SRON Netherlands Institute for Space Research, Sorbonnelaan 2, 3584, CA Utrecht, The Netherlands
-
Leiden University · Leiden Observatory · Space Research Organisation Netherlands
Affiliation as printed
Leiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, The Netherlands
SRON Netherlands Institute for Space Research, Sorbonnelaan 2, 3584, CA Utrecht, The Netherlands
-
Affiliation as printed
Center for Cosmology and AstroParticle Physics, The Ohio State University, 191 West Woodruff Avenue, Columbus, OH 43210, USA
Department of Astronomy, The Ohio State University, 140 W 18th Avenue, Columbus, OH 43210, USA
-
University of Copenhagen · University of Arizona
Affiliation as printed
DARK, Niels Bohr Institute, University of Copenhagen, Vibenshuset, Lyngbyvej 2, DK-2100 Copenhagen Ø, Denmark
Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USA
-
University of Nevada, Las Vegas
Affiliation as printed
Department of Physics & Astronomy, University of Nevada, Las Vegas, 4505 S. Maryland Pkwy, Las Vegas, NV 89154-4002, USA
-
Affiliation as printed
Department of Physics and Astronomy, Georgia State University, 25 Park Place, Suite 605, Atlanta, GA 30303, USA
-
Istituto di Astrofisica Spaziale e Fisica Cosmica di Milano
Affiliation as printed
INAF—Istituto di Astrofisica Spaziale e Fisica Cosmica Milano, via Corti 12, I-20133 Milano, Italy
-
Affiliation as printed
Department of Astronomy and Astrophysics, Eberly College of Science, The Pennsylvania State University, 525 Davey Laboratory, University Park, PA 16802, USA
Department of Physics, The Pennsylvania State University, 104 Davey Laboratory, University Park, PA 16802, USA
Institute for Gravitation and the Cosmos, The Pennsylvania State University, University Park, PA 16802, USA
-
University of Padua · Osservatorio Astronomico di Padova
Affiliation as printed
Dipartimento di Fisica e Astronomia “G. Galilei,” Università di Padova, Vicolo dell’Osservatorio 3, I-35122 Padova, Italy
INAF-Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5 I-35122, Padova, Italy
Dipartimento di Fisica e Astronomia "G. Galilei," Università di Padova, Vicolo dell'Osservatorio 3, I-35122 Padova, Italy
INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5 I-35122, Padova, Italy
-
Massachusetts Institute of Technology
Affiliation as printed
Department of Physics, and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
-
Spectral Sciences (United States)
Affiliation as printed
Spectral Sciences Inc., 4 Fourth Avenue, Burlington, MA 01803, USA
-
Affiliation as printed
SUPA Physics and Astronomy, University of St. Andrews, Fife, KY16 9SS Scotland, UK
-
Affiliation as printed
School of Physics and Astronomy, University of Southampton, Highfield, Southampton, SO17 1BJ, UK
-
Affiliation as printed
Center for Cosmology and AstroParticle Physics, The Ohio State University, 191 West Woodruff Avenue, Columbus, OH 43210, USA
Department of Astronomy, The Ohio State University, 140 W 18th Avenue, Columbus, OH 43210, USA
-
Affiliation as printed
SUPA Physics and Astronomy, University of St. Andrews, Fife, KY16 9SS Scotland, UK
Cited by 18 stored of 18
18 results
No patents citing this paper on Lens.org (checked 2026-10-11).