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 to 9157 angstroms) combine simultaneous HST , 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, temperature T1 at 1 light day from the black hole, and a temperature-radius slope, alpha. 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
Cite
@article{arxiv.1611.06051,
title = {Space Telescope and Optical Reverberation Mapping Project VI: reverberating Disk Models for NGC 5548},
author = {D. Starkey and Keith Horne and M. M. Fausnaugh and B. M. Peterson and M. C. Bentz and C. S. Kochanek and K. D. Denney and R. Edelson and M. R. Goad and G. De Rosa and M. D. Anderson and P. Arevalo and A. J. Barth and C. Bazhaw and G. A. Borman and T. A. Boroson and M. C. Bottorff and W. N. Brandt and A. A. Breeveld and E. M. Cackett and M. T. Carini and K. V. Croxall and D. M. Crenshaw and E. Dalla Bonta and A. De Lorenzo-Caceres and M. Dietrich and N. V. Efimova and J. Ely and P. A. Evans and A. V. Filippenko and K. Flatland and N. Gehrels and S. Geier and J. M. Gelbord and L. Gonzalez and V. Gorjian and C. J. Grier and D. Grupe and P. B. Hall and S. Hicks and D. Horenstein and T. Hutchison and M. Im and J. J. Jensen and M. D. Joner and J. Jones and J. Kaastra and S. Kaspi and B. C. Kelly and J. A. Kennea and S. C. Kim and M. Kim and S. A. Klimanov and K. T. Korista and G. A. Kriss and J. C. Lee and D. C. Leonard and P. Lira and F. MacInnis and E. R. Manne-Nicholas and S. Mathur and I. M. McHardy and C. Montouri and R. Musso and S. V. Nazarov and R. P. Norris and J. A. Nousek and D. N. Okhmat and A. Pancoast and J. R. Parks and L. Pei and R. W. Pogge and J. -U. Pott and S. E. Rafter and H. W. Rix and D. A. Saylor and J. S. Schimoia and K. Schnulle and S. G. Sergeev and M. H. Siegel and M. Spencer and H. -I. Sung and K. G. Teems and C. S. Turner and P. Uttley and M. Vestergaard and C. Villforth and Y. Weiss and J. -H. Woo and H. Yan and S. Young and W. Zheng and Y. Zu},
journal= {arXiv preprint arXiv:1611.06051},
year = {2017}
}
Comments
V2: Oops wrong title! V1: Accepted for publication in ApJ, 20 Pages, 11 Figures