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Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. XVI. A 13 year study of spectral variability in NGC 5548
文献类型：期刊论文
| 作者 | Peterson, BM; Berlind, P; Bertram, R; Bischoff, K; Bochkarev, NG; Borisov, N; Burenkov, AN; Calkins, M; Carrasco, L; Chavushyan, VH |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2002-12-10 |
| 卷号 | 581期号:1页码:197-204 |
| 关键词 | galaxies : active galaxies : individual (NGC 5548) galaxies : nuclei galaxies : Seyfert |
| 英文摘要 | We present the final installment of an intensive 13 year study of variations of the optical continuum and broad Hbeta emission line in the Seyfert 1 galaxy NGC 5548. The database consists of 1530 optical continuum measurements and 1248 Hbeta measurements. The Hbeta variations follow the continuum variations closely, with a typical time delay of about 20 days. However, a year-by-year analysis shows that the magnitude of emission-line time delay is correlated with the mean continuum flux. We argue that the data are consistent with the simple model prediction between the size of the broad-line region and the ionizing luminosity, rproportional toL(ion)(1/2). Moreover, the apparently linear nature of the correlation between the Hbeta response time and the nonstellar optical continuum F-opt arises as a consequence of the changing shape of the continuum as it varies, specifically F(opt)proportional toF(UV)(0.56). . |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | NGC 5548 ; OPTICAL WAVELENGTHS ; SEYFERT-GALAXIES ; EMISSION-LINES ; LONG-TERM ; CONTINUUM ; QUASARS ; ULTRAVIOLET ; LUMINOSITY ; ACCURACY |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000179681500013 |
| 源URL | [http://119.78.226.72/handle/331011/28304]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Univ Arizona, Steward Observ, Tucson, AZ 85721 USA 2.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA 3.Ohio State Univ, Dept Astron, Columbus, OH 43210 USA 4.Univ Sternwarte Gottingen, D-37083 Gottingen, Germany 5.Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Moscow 119992, Russia 6.Russian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 357147, Karachai Cherke, Russia 7.Inst Nacl Astrofis Opt & Electr, Puebla 72000, Mexico 8.Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA 9.Univ Florida, Dept Astron, Gainesville, FL 32611 USA 10.Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Crimean Lab, UA-98409 Nauchnyi, Crimea, Ukraine |
| 推荐引用方式 GB/T 7714 | Peterson, BM,Berlind, P,Bertram, R,et al. Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. XVI. A 13 year study of spectral variability in NGC 5548[J]. ASTROPHYSICAL JOURNAL,2002,581(1):197-204. |
| APA | Peterson, BM.,Berlind, P.,Bertram, R.,Bischoff, K.,Bochkarev, NG.,...&Wilkes, BJ.(2002).Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. XVI. A 13 year study of spectral variability in NGC 5548.ASTROPHYSICAL JOURNAL,581(1),197-204. |
| MLA | Peterson, BM,et al."Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. XVI. A 13 year study of spectral variability in NGC 5548".ASTROPHYSICAL JOURNAL 581.1(2002):197-204. |
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来源：上海天文台
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