空间望远镜与光学反响映射项目 IX. NGC 5548中宽发射线的速度-延迟图
星系天体物理
2021-02-10 v2
摘要
我们报告了NGC5548光谱中显著宽发射线Ly_alpha、CIV、HeII和H_beta的速度-延迟图。发射线响应位于维里包络内部。速度-延迟图揭示了分层电离结构。5-10光日内的HeII响应具有宽单峰速度轮廓。Ly_alpha、CIV和H_beta响应在10光日内达到峰值，延伸至20光日外，并在10至20光日延迟范围内呈现由5000 km/s分隔的双峰速度轮廓。速度-延迟图显示，先前互相关分析发现的M形滞后-速度结构是具明确外边缘R=20光日的开普勒盘的标志。M的外翼源于维里包络，M的U形内部是速度-延迟平面中椭圆的下半部分。远侧响应弱于近侧响应，因此我们清晰看到速度-延迟椭圆的下半部分，仅模糊看到上半部分。线中心的延迟tau=(R/c)(1-sin(i))=5光日来自倾斜环的近边缘，给出倾角i=45度。黑洞质量M=7x10^7 Msun与速度-延迟结构一致。CIV以及可能Ly_alpha线轮廓上从红向蓝移动的条纹状理发店柱模式，暗示了绕宽线区远侧旋转的方位角结构存在，并可能是内盘结构进动或轨道运动的标志。未来对NGC 5548跨越多年但步长或许为10天而非1天的进一步HST观测，有助于澄清这一新AGN现象的本质。
引用
@article{arxiv.2003.01448,
title = {Space Telescope and Optical Reverberation Mapping Project. IX. Velocity-Delay Maps for Broad Emission Lines in NGC 5548},
author = {Keith Horne and G. De Rosa and B. M. Peterson and A. J. Barth and J. Ely and M. M. Fausnaugh and G. A. Kriss and L. Pei and S. M. Adams and M. D. Anderson and P. Arevalo and T G. Beatty and V. N. Bennert and M. C. Bentz and A. Bigley and S. Bisogni and G. A. Borman and T. A. Boroson and M. C. Bottorff and W. N. Brandt and A. A. Breeveld and M. Brotherton and J. E. Brown and J. S. Brown and E. M. Cackett and G. Canalizo and M. T. Carini and K. I. Clubb and J. M. Comerford and E. M. Corsini and D. M. Crenshaw and S. Croft and K. V. Croxall and E. Dalla Bonta and A. J. Deason and M. Dehghanian and A. De Lorenzo-Caceres and K. D. Denney and M. Dietrich and C. Done and R. Edelson and N. V. Efimova and M. Eracleous and P. A. Evans and G. J. Ferland and A. V. Filippenko and K. Flatland and O. D. Fox and E. Gardner and E. L. Gates and N. Gehrels and S. Geier and J. M. Gelbord and M. R. Goad and L. Gonzalez and V. Gorjian and J. E. Greene and C. J. Grier and D. Grupe and A. Gupta and P. B. Hall and C. B. Henderson and S. Hicks and E. Holmbeck and T. W. -S. Holoien and T. Hutchison and M. Im and J. J. Jensen and C. A. Johnson and M. D. Joner and J. Jones and J. Kaastra and S. Kaspi and P. L. Kelly and J. A. Kennea and M. Kim and S. Kim and S. C. Kim and A. King and S. A. Klimanov and C. S. Kochanek and K. T. Korista and Y. Krongold and M. W. Lau and J. C. Lee and D. C. Leonard and Miao Li and P. Lira and C. Lochhaas and Zhiyuan Ma and F. MacInnis and M. A. Malkan and E. R. Manne-Nicholas and S. Mathur and J. C. Mauerhan and R. McGurk and I. M. Mc Hardy and C. Montuori and L. Morelli and A. Mosquera and D. Mudd and F. Mueller-Sanchez and S. V. Nazarov and H. Netzer and R. P. Norris and J. A. Nousek and M. L. Nguyen and P. Ochner and D. N. Okhmat and A. Pancoast and I. Papadakis and J. R. Parks and M. T. Penny and A. Pizzella and R. W. Pogge and R. Poleski and J. -U. Pott and D. Proga and S. E. Rafter and H. -W. Rix and J. Runnoe and D. A. Saylor and J. S. Schimoia and K. Schnuelle and B. Scott and S. G. Sergeev and B. J. Shappee and I. Shivvers and M. Siegel and G. V. Simonian and A. Siviero and A. Skielboe and G. Somers and M. Spencer and D. Starkey and D. J. Stevens and M. A. Strauss and H. -I. Sung and J. Tayar and K. G. Teems and N. Tejos and T. Treu and C. S. Turner and P. Uttley and J . Van Saders and M. Vestergaard and L. Vican and S. Villanueva and C. Villforth and Y. Weiss and J. -H. Woo and H. Yan and S. Young and H. Yuk and N. L. Zakamska and W. Zheng and W. Zhu and Y. Zu},
journal= {arXiv preprint arXiv:2003.01448},
year = {2021}
}
备注
19 pages, 9 figures, ApJ in press