论文标题
测试带有混响映射的宽线区域模型
Testing broad line region models with Reverberation Mapping
论文作者
论文摘要
新的混响映射（RM）测量结果，结合精确的亮度和线比，对在活性银河核（AGN）的宽线区域（BLR）中发射气体的位置提供了强大的限制。在本文中，我介绍了辐射压力和磁性限制云的新计算，并将其应用于``通用AGN''和NGC 5548。新计算与所有广泛排放线的滞后差异非常吻合，与LA的亮度和LA的亮度与LA的亮度，以及Civ 1549，CIV 1549，OVI 1035和HEII 1640的合理性。 1990a ciii]和Siiii]线的混合物，用于高金属气体。他们解释了连续亮度增加及其对BLR内边界和外部边界的依赖性后，时间停滞的变化。他们还预测了非常强大的Balmer和Paschen Continua，对连续RM实验具有重要意义。但是，计算出的Balmer和Paschen线的发光度对于2-5的因素来说太弱了。这场``Balmer Line危机''在几项早期的作品中被指出，现在被过去无法使用的RM测量所确认和限制。似乎使用逃生概率形式主义的当前光电离代码无法正确计算高密度，大的光学深度气体的Balmer系列发光度。
New reverberation mapping (RM) measurements, combined with accurate luminosities and line ratios, provide strong constraints on the location of the line emitting gas in the broad line region (BLR) of active galactic nuclei (AGN). In this paper I present new calculations of radiation pressure and magnetic pressure confined clouds and apply them to a ``generic AGN'' and to NGC 5548. The new calculations are in good agreement with the observed lags of all broad emission lines, and with the luminosities of La, Civ 1549, Ovi 1035 and Heii 1640. They are also in reasonable agreement with the luminosities of Mgii 2798 and the 1990A blend of Ciii] and Siiii] lines for high metallicity gas. They explain the changes in time-lag following an increase in continuum luminosity and their dependencies on the inner and outer boundaries of the BLR. They also predict very strong Balmer and Paschen continua with important implications to continuum RM experiments. However, the calculated Balmer and Paschen line luminosities are too weak, by factors of 2-5. This ``Balmer line crisis'' was noted in several earlier works and is now confirmed and constrained by RM measurements that were not available in the past. It seems that present photoionization codes that use the escape probability formalism, fail to correctly compute the Balmer line luminosities in high density, large optical depth gas.
