Space Telescope and Optical Reverberation Mapping Project. V. Optical Spectroscopic Campaign and Emission-line Analysis for NGC 5548

Autor: S. Young, Brandon C. Kelly, J.-U. Pott, T. Hutchison, Scott M. Adams, E. Holmbeck, A. A. Breeveld, Jelle Kaastra, S. E. Rafter, Misty C. Bentz, G. A. Borman, P. Arévalo, D. A. Starkey, Michael T. Carini, I. E. Papadakis, M. Dietrich, Alis J. Deason, I. M. McHardy, Vardha N. Bennert, Kelly D. Denney, Michael D. Joner, Gabriela Canalizo, Justin Ely, A. Pancoast, Catherine J. Grier, D. C. Leonard, P. Ochner, Ying Zu, Zhiyuan Ma, A. Skielboe, J. van Saders, Bryan Scott, D. Horenstein, J. A. Kennea, Carl T. Coker, W. N. Brandt, A. Gupta, H. Yuk, D. Grupe, M. C. Bottorff, Michael Fausnaugh, Myungshin Im, Marianne Vestergaard, Rick Edelson, K. Schnülle, M. Spencer, Sang Chul Kim, C. Montouri, Miao Li, J. J. Jensen, W. Zheng, Nadia L. Zakamska, Gary J. Ferland, Ana M. Mosquera, N. V. Efimova, Steve Croft, Jenny E. Greene, Michael Eracleous, A. de Lorenzo-Cáceres, M. R. Goad, D. A. Saylor, Richard W. Pogge, Calen B. Henderson, Radosław Poleski, Jessie C. Runnoe, Carolin Villforth, G. De Rosa, A. V. Filippenko, Ori D. Fox, M. W. Lau, Thomas W.-S. Holoien, Michael S. Brotherton, H. Yan, Kirk T. Korista, C. Bazhaw, E. M. Cackett, B. Ou-Yang, Hagai Netzer, K. G. Teems, Michael A. Strauss, Aaron J. Barth, Alessandro Pizzella, Jon C. Mauerhan, Steven Villanueva, Christopher S. Kochanek, J. C. Lee, R. McGurk, M. H. Siegel, K. Flatland, F. Muller Sanchez, D. Mudd, Nicolas Tejos, Elinor L. Gates, P. Lira, Kelsey I. Clubb, S. V. Nazarov, Lorenzo Morelli, R. Musso, Cassandra Lochhaas, Patrick B. Hall, H.-I. Sung, Matthew T. Penny, Tommaso Treu, D. M. Crenshaw, H.-W. Rix, Bradley M. Peterson, Daniel J. Stevens, D. N. Okhmat, Patrick L. Kelly, Thomas G. Beatty, M. L. Nguyen, Ryan Norris, S. Mathur, Susanna Bisogni, Isaac Shivvers, S. Geier, Keith Horne, Phil Evans, G. V. Simonian, E. Dalla Bontà, Benjamin J. Shappee, A. L. King, Shai Kaspi, Enrico Maria Corsini, G. A. Kriss, C. S. Turner, J. R. Parks, Y. Weiss, M. Malkan, E. R. Manne-Nicholas, Jonathan Gelbord, Alessandro Siviero, Wei Zhu, S. G. Sergeev, F. MacInnis, Minjin Kim, J. A. Nousek, Cassidy Johnson, J. S. Brown, A. Bigley, S. Hicks, Julia M. Comerford, J. D. Jones, J. S. Schimoia, Jamie Tayar, K. V. Croxall, Laura Vican, Jong-Hak Woo, Garrett Somers, Phil Uttley, Liuyi Pei, N. Gehrels, J. E. Brown, Stacy Y. Kim, S. A. Klimanov
Přispěvatelé: USA, Science & Technology Facilities Council, University of St Andrews. School of Physics and Astronomy, University of St Andrews. St Andrews Centre for Exoplanet Science, High Energy Astrophys. & Astropart. Phys (API, FNWI)
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Zdroj: ASTROPHYSICAL JOURNAL (ISSN 0004-637X), 837(2), 131
Pei, L, Fausnaugh, M M, Barth, A J, Peterson, B M, Bentz, M C, De Rosa, G, Denney, K D, Goad, M R, Kochanek, C S, Korista, K T, Kriss, G A, Pogge, R W, Bennert, V N, Brotherton, M, Clubb, K I, Dalla Bontà, E, Filippenko, A V, Greene, J E, Grier, C J, Vestergaard, M, Zheng, W, Adams, S M, Beatty, T G, Bigley, A, Brown, J E, Brown, J S, Canalizo, G, Comerford, J M, Coker, C T, Corsini, E M, Croft, S, Croxall, K V, Deason, A J, Eracleous, M, Fox, O D, Gates, E L, Henderson, C B, Holmbeck, E, Holoien, T W S, Jensen, J J, Johnson, C A, Kelly, P L, Kim, S, King, A, Lau, M W, Li, M, Lochhaas, C, Ma, Z, Manne-Nicholas, E R, Mauerhan, J C, Malkan, M A, McGurk, R, Morelli, L, Mosquera, A, Mudd, D, Sanchez, F M, Nguyen, M L, Ochner, P, Ou-Yang, B, Pancoast, A, Penny, M T, Pizzella, A, Poleski, R, Runnoe, J, Scott, B, Schimoia, J S, Shappee, B J, Shivvers, I, Simonian, G V, Siviero, A, Somers, G, Stevens, D J, Strauss, M A, Tayar, J, Tejos, N, Treu, T, Van Saders, J, Vican, L, Villanueva, S, Yuk, H, Zakamska, N L, Zhu, W, Anderson, M D, Arévalo, P, Bazhaw, C, Bisogni, S, Borman, G A, Bottorff, M C, Brandt, W N, Breeveld, A A, Cackett, E M, Carini, M T, Crenshaw, D M, De Lorenzo-Cáceres, A, Dietrich, M, Edelson, R, Efimova, N V, Ely, J, Evans, P A, Ferland, G J, Flatland, K, Gehrels, N, Geier, S, Gelbord, J M, Grupe, D, Gupta, A, Hall, P B, Hicks, S, Horenstein, D, Horne, K, Hutchison, T, Im, M, Joner, M D, Jones, J, Kaastra, J, Kaspi, S, Kelly, B C, Kennea, J A, Kim, M, Kim, S C, Klimanov, S A, Lee, J C, Leonard, D C, Lira, P, Macinnis, F, Mathur, S, Mchardy, I M, Montouri, C, Musso, R, Nazarov, S V, Netzer, H, Norris, R P, Nousek, J A, Okhmat, D N, Papadakis, I, Parks, J R, Pott, J U, Rafter, S E, Rix, H W, Saylor, D A, Schnülle, K, Sergeev, S G, Siegel, M, Skielboe, A, Spencer, M, Starkey, D, Sung, H I, Teems, K G, Turner, C S, Uttley, P, Villforth, C, Weiss, Y, Woo, J H, Yan, H, Young, S & Zu, Y 2017, ' Space Telescope and Optical Reverberation Mapping Project. V. Optical Spectroscopic Campaign and Emission-line Analysis for NGC 5548 ', Astrophysical Journal, vol. 837, no. 2, 131 . https://doi.org/10.3847/1538-4357/aa5eb1
Astrophysical journal, 2017, Vol.837(2), pp.131 [Peer Reviewed Journal]
NASA Astrophysics Data System
Astrophysical Journal, 837(2):131. IOP Publishing Ltd.
ISSN: 0004-637X
DOI: 10.3847/1538-4357/aa5eb1
Popis: We present the results of an optical spectroscopic monitoring program targeting NGC 5548 as part of a larger multi-wavelength reverberation mapping campaign. The campaign spanned six months and achieved an almost daily cadence with observations from five ground-based telescopes. The H$\beta$ and He II $\lambda$4686 broad emission-line light curves lag that of the 5100 $\AA$ optical continuum by $4.17^{+0.36}_{-0.36}$ days and $0.79^{+0.35}_{-0.34}$ days, respectively. The H$\beta$ lag relative to the 1158 $\AA$ ultraviolet continuum light curve measured by the Hubble Space Telescope is roughly $\sim$50% longer than that measured against the optical continuum, and the lag difference is consistent with the observed lag between the optical and ultraviolet continua. This suggests that the characteristic radius of the broad-line region is $\sim$50% larger than the value inferred from optical data alone. We also measured velocity-resolved emission-line lags for H$\beta$ and found a complex velocity-lag structure with shorter lags in the line wings, indicative of a broad-line region dominated by Keplerian motion. The responses of both the H$\beta$ and He II $\lambda$4686 emission lines to the driving continuum changed significantly halfway through the campaign, a phenomenon also observed for C IV, Ly $\alpha$, He II(+O III]), and Si IV(+O IV]) during the same monitoring period. Finally, given the optical luminosity of NGC 5548 during our campaign, the measured H$\beta$ lag is a factor of five shorter than the expected value implied by the $R_\mathrm{BLR} - L_\mathrm{AGN}$ relation based on the past behavior of NGC 5548.
Comment: 22 pages, 13 figures, accepted to ApJ
Databáze: OpenAIRE
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