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

被引：29

作者：

Kriss, G. A. ^{[1
]}

De Rosa, G. ^{[1
]}

Ely, J. ^{[1
]}

Peterson, B. M. ^{[1
,2
,3
]}

Kaastra, J. ^{[4
,5
]}

Mehdipour, M. ^{[4
]}

Ferland, G. J. ^{[6
]}

Dehghanian, M. ^{[6
]}

Mathur, S. ^{[2
,3
]}

Edelson, R. ^{[7
]}

Korista, K. T. ^{[8
]}

Arav, N. ^{[9
]}

Barth, A. J. ^{[10
]}

Bentz, M. C. ^{[11
]}

Brandt, W. N. ^{[12
,13
,14
]}

Crenshaw, D. M. ^{[11
]}

Dalla Bonta, E. ^{[15
,16
]}

Denney, K. D. ^{[2
,3
,17
]}

Done, C. ^{[18
]}

Eracleous, M. ^{[12
,13
]}

Fausnaugh, M. M. ^{[2
,19
]}

Gardner, E. ^{[20
]}

Goad, M. R. ^{[21
]}

Grier, C. J. ^{[2
,22
]}

Horne, Keith ^{[23
]}

Kochanek, C. S. ^{[2
,3
]}

McHardy, I. M. ^{[24
]}

Netzer, H. ^{[25
]}

Pancoast, A. ^{[26
]}

Pei, L. ^{[10
]}

Pogge, R. W. ^{[2
,3
]}

Proga, D. ^{[27
]}

Silva, C. ^{[4
,28
]}

Tejos, N. ^{[29
]}

Vestergaard, M. ^{[22
,30
]}

Adams, S. M. ^{[2
,31
]}

Anderson, M. D. ^{[11
]}

Arevalo, P. ^{[32
]}

Beatty, T. G. ^{[2
,12
,33
]}

Behar, E. ^{[34
]}

Bennert, V. N. ^{[35
]}

Bianchi, S. ^{[36
]}

Bigley, A. ^{[37
]}

Bisogni, S. ^{[2
,26
,38
]}

Boissay-Malaquin, R. ^{[39
]}

Borman, G. A. ^{[40
]}

Bottorff, M. C. ^{[41
]}

Breeveld, A. A. ^{[42
]}

Brotherton, M. ^{[43
]}

Brown, J. E. ^{[44
]}

机构：

[1] Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA

[2] Ohio State Univ, Dept Astron, 140 West 18th Ave, Columbus, OH 43210 USA

[3] Ohio State Univ, Ctr Cosmol & AstroParticle Phys, 191 West Woodruff Ave, Columbus, OH 43210 USA

[4] SRON Netherlands Inst Space Res, Sorbonnelaan 2, NL-3584 CA Utrecht, Netherlands

[5] Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands

[6] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA

[7] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[8] Western Michigan Univ, Dept Phys, 1120 Everett Tower, Kalamazoo, MI 49008 USA

[9] Virginia Tech, Dept Phys, Blacksburg, VA 24061 USA

[10] Univ Calif Irvine, Dept Phys & Astron, 4129 Frederick Reines Hall, Irvine, CA 92697 USA

[11] Georgia State Univ, Dept Phys & Astron, 25 Pk Pl,Suite 605, Atlanta, GA 30303 USA

[12] Penn State Univ, Eberly Coll Sci, Dept Astron & Astrophys, 525 Davey Lab, 525 Davey Lab, University Pk, PA 16802 USA

[13] Penn State Univ, Inst Gravitat & Cosmos, University Pk, PA 16802 USA

[14] Penn State Univ, Dept Phys, 104 Davey Lab, University Pk, PA 16802 USA

[15] Univ Padua, Dipartimento Fis & Astron G Galilei, Vicolo Osservatorio 3, I-35122 Padua, Italy

[16] INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy

[17] Illuminat Works LLC, 5650 Blazer Pkwy, Dublin, OH 43017 USA

[18] Univ Durham, Dept Phys, Ctr Extragalact Astron, South Rd, Durham DH1 3LE, England

[19] MIT, Dept Phys, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[20] Univ Reading, Sch Biol Sci, Reading RG6 6AS, Berks, England

[21] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England

[22] Univ Arizona, Steward Observ, 933 North Cherry Ave, Tucson, AZ 85721 USA

[23] Univ St Andrews, SUPA Phys & Astron, St Andrews KY16 9SS, Fife, Scotland

[24] Univ Southampton, Southampton SO17 1BJ, Hants, England

[25] Tel Aviv Univ, Raymond & Beverly Sackler Fac Exact Sci, Sch Phys & Astron, IL-69978 Tel Aviv, Israel

[26] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA

[27] Univ Nevada, Dept Phys & Astron, 4505 South Maryland Pkwy,Box 454002, Las Vegas, NV 89154 USA

[28] Univ Amsterdam, Astron Inst Anton Pannekoek, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands

[29] Pontificia Univ Catolica Valparaiso, Inst Fis, Casilla 4059, Valparaiso, Chile

[30] Univ Copenhagen, Niels Bohr Inst, DARK, Lyngbyvej 2, DK-2100 Copenhagen O, Denmark

[31] CALTECH, Cahill Ctr Astrophys, Pasadena, CA 91125 USA

[32] Univ Valparaiso, Fac Ciencias, Inst Fis & Astronom, Gran Bretana N 1111, Valparaiso, Chile

[33] Penn State Univ, Ctr Exoplanets & Habitable Worlds, University Pk, PA 16802 USA

[34] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel

[35] Calif Polytech State Univ San Luis Obispo, Phys Dept, San Luis Obispo, CA 93407 USA

[36] Univ Roma Tre, Dipartimento Matemat & Fis, Via Vasca Navale 84, I-00146 Rome, Italy

[37] Univ Calif Berkeley, Dept Astron, 601 Campbell Hall, Berkeley, CA 94720 USA

[38] Osserv Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy

[39] MIT, Kavli Inst Astrophys & Space Res, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[40] Crimean Astrophys Observ, PO Nauchny, Crimea 298409, Russia

[41] Southwestern Univ, Dept Phys, Fountainwood Observ, FJS 149,1011 East Univ Ave, Georgetown, TX 78626 USA

[42] Univ Coll London, Mullard Space Sci Lab, Holmbury St Mary, Dorking RH5 6NT, Surrey, England

[43] Univ Wyoming, Dept Phys & Astron, 1000 East Univ Ave, Laramie, WY 82071 USA

[44] Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA

[45] Univ Calif Santa Cruz, Dept Astron & Astrophys, 1156 High St, Santa Cruz, CA 95064 USA

[46] Wayne State Univ, Dept Phys & Astron, 666 West Hancock St, Detroit, MI 48201 USA

[47] Univ Calif Riverside, Dept Astron, Riverside, CA 92521 USA

[48] INAF IASF Bologna, Via Gobetti 101, I-40129 Bologna, Italy

[49] Western Kentucky Univ, Dept Phys & Astron, 1906 Coll Hts Blvd 11077, Bowling Green, KY 42101 USA

[50] Univ Colorado, Dept Astrophys & Planetary Sci, Boulder, CO 80309 USA

来源：

ASTROPHYSICAL JOURNAL | 2019年 / 881卷 / 02期

基金：

英国科学技术设施理事会; 新加坡国家研究基金会; 加拿大自然科学与工程研究理事会; 美国国家科学基金会; 美国国家航空航天局;

关键词：

galaxies: active; galaxies: individual (NGC 5548); galaxies: nuclei; galaxies: Seyfert; BROAD-LINE REGION; ACTIVE GALACTIC NUCLEI; DRIVEN DISK WINDS; X-RAY; BLACK-HOLE; FE-II; NGC-5548; DYNAMICS; STEPS; SIZE;

D O I：

10.3847/1538-4357/ab3049

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 alpha 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 alpha 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 similar to 10(5) 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 similar to 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.

引用

页数：36

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