arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2003.01448astro-ph.GA
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太空望远镜和光学混响测绘项目。IX。NGC 5548中宽发射线的速度延迟图

Space Telescope and Optical Reverberation Mapping Project. IX. Velocity-Delay Maps for Broad Emission Lines in NGC 5548

Keith Horne, G. De Rosa, B. M. Peterson, A. J. Barth, J. Ely, M. M. Fausnaugh, G. A. Kriss, L. Pei, S. M. Adams, M. D. Anderson, P. Arevalo, T G. Beatty, V. N. … 展开作者

Keith Horne, G. De Rosa, B. M. Peterson, A. J. Barth, J. Ely, M. M. Fausnaugh, G. A. Kriss, L. Pei, S. M. Adams, M. D. Anderson, P. Arevalo, T G. Beatty, V. N. Bennert, M. C. Bentz, A. Bigley, S. Bisogni, G. A. Borman, T. A. Boroson, M. C. Bottorff, W. N. Brandt, A. A. Breeveld, M. Brotherton, J. E. Brown, J. S. Brown, E. M. Cackett, G. Canalizo, M. T. Carini, K. I. Clubb, J. M. Comerford, E. M. Corsini, D. M. Crenshaw, S. Croft, K. V. Croxall, E. Dalla Bonta, A. J. Deason, M. Dehghanian, A. De Lorenzo-Caceres, K. D. Denney, M. Dietrich, C. Done, R. Edelson, N. V. Efimova, M. Eracleous, P. A. Evans, G. J. Ferland, A. V. Filippenko, K. Flatland, O. D. Fox, E. Gardner, E. L. Gates, N. Gehrels, S. Geier, J. M. Gelbord, M. R. Goad, L. Gonzalez, V. Gorjian, J. E. Greene, C. J. Grier, D. Grupe, A. Gupta, P. B. Hall, C. B. Henderson, S. Hicks, E. Holmbeck, T. W. -S. Holoien, T. Hutchison, M. Im, J. J. Jensen, C. A. Johnson, M. D. Joner, J. Jones, J. Kaastra, S. Kaspi, P. L. Kelly, J. A. Kennea, M. Kim, S. Kim, S. C. Kim, A. King, S. A. Klimanov, C. S. Kochanek, K. T. Korista, Y. Krongold, M. W. Lau, J. C. Lee, D. C. Leonard, Miao Li, P. Lira, C. Lochhaas, Zhiyuan Ma, F. MacInnis, M. A. Malkan, E. R. Manne-Nicholas, S. Mathur, J. C. Mauerhan, R. McGurk, I. M. Mc Hardy, C. Montuori, L. Morelli, A. Mosquera, D. Mudd, F. Mueller-Sanchez, S. V. Nazarov, H. Netzer, R. P. Norris, J. A. Nousek, M. L. Nguyen, P. Ochner, D. N. Okhmat, A. Pancoast, I. Papadakis, J. R. Parks, M. T. Penny, A. Pizzella, R. W. Pogge, R. Poleski, J. -U. Pott, D. Proga, S. E. Rafter, H. -W. Rix, J. Runnoe, D. A. Saylor, J. S. Schimoia, K. Schnuelle, B. Scott, S. G. Sergeev, B. J. Shappee, I. Shivvers, M. Siegel, G. V. Simonian, A. Siviero, A. Skielboe, G. Somers, M. Spencer, D. Starkey, D. J. Stevens, M. A. Strauss, H. -I. Sung, J. Tayar, K. G. Teems, N. Tejos, T. Treu, C. S. Turner, P. Uttley, J . Van Saders, M. Vestergaard, L. Vican, S. Villanueva, C. Villforth, Y. Weiss, J. -H. Woo, H. Yan, S. Young, H. Yuk, N. L. Zakamska, W. Zheng, W. Zhu, Y. Zu

摘要:

我们报道了NGC 5548光谱中Ly_alpha、CIV、HeII和H_beta等主要宽发射线的速度延迟图。发射线响应存在于位力包络的内部。速度延迟图揭示了分层电离结构。HeII在5-10光日内的响应具有宽的单峰速度剖面。Ly_alpha、CIV和H_beta响应在10光日内达到峰值,在20光日外延伸,在10 ~ 20光日延迟范围内呈现双峰速度分布,两峰间距为5000 km/s。速度延迟图表明,在先前的互相关分析中发现的M形滞后与速度结构是开普勒盘的特征,该盘在R=20光日处具有明确的外缘。M的外翼来自维里包络,M的U形内部是速度延迟平面中椭圆的下半部分。远侧的响应比近侧的响应弱,因此我们可以清楚地看到速度延迟椭圆的下半部分,但只能隐约看到上半部分。线中心的延迟τ =(R/c)(1-sin(i))=5光日是从倾斜环的近边缘开始的,给出倾斜度i=45度。质量为M= 7 × 10^7 Msun的黑洞与速度延迟结构一致。条纹从红色移动到蓝色的Barber-pole图案横跨CIV和可能的Ly_alpha线轮廓,表明存在围绕宽线区域远侧旋转的方位角结构,并且可能是内盘中结构的进动或轨道运动的特征。对NGC 5548的进一步HST观测持续了多年,但可能是10天而不是1天,这有助于澄清这种新活动星系核现象的性质。

英文摘要:

We report velocity-delay maps for prominent broad emission lines, Ly_alpha, CIV, HeII and H_beta, in the spectrum of NGC5548. The emission-line responses inhabit the interior of a virial envelope. The velocity-delay maps reveal stratified ionization structure. The HeII response inside 5-10 light-days has a broad single-peaked velocity profile. The Ly_alpha, CIV, and H_beta responses peak inside 10 light-days, extend outside 20 light-days, and exhibit a velocity profile with two peaks separated by 5000 km/s in the 10 to 20 light-day delay range. The velocity-delay maps show that the M-shaped lag vs velocity structure found in previous cross-correlation analysis is the signature of a Keplerian disk with a well-defined outer edge at R=20 light-days. The outer wings of the M arise from the virial envelope, and the U-shaped interior of the M is the lower half of an ellipse in the velocity-delay plane. The far-side response is weaker than that from the near side, so that we see clearly the lower half, but only faintly the upper half, of the velocity--delay ellipse. The delay tau=(R/c)(1-sin(i))=5 light-days at line center is from the near edge of the inclined ring, giving the inclination i=45 deg. A black hole mass of M=7x10^7 Msun is consistent with the velocity-delay structure. A barber-pole pattern with stripes moving from red to blue across the CIV and possibly Ly_alpha line profiles suggests the presence of azimuthal structure rotating around the far side of the broad-line region and may be the signature of precession or orbital motion of structures in the inner disk. Further HST observations of NGC 5548 over a multi-year timespan but with a cadence of perhaps 10 days rather than 1 day could help to clarify the nature of this new AGN phenomenon.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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