论文标题
部分可观测时空混沌系统的无模型预测
AGN Light Echoes and the Accretion Disc Self-Gravity Limit
论文作者
论文摘要
积聚盘理论预测，AGN光盘会变得自我磨碎，并以外半径为$ r _ {\ rm sg} $ 〜12亮日分解为恒星，实际上没有免费参数。我们提供的证据表明，在AGN休息框架中，观察到的AGN光回声越长接近12D。这些观察结果对AGN光盘理论进行了严格的测试。进一步的监测应洞悉形成盘的气体的角度动量。对于遥远的AGN，观察到的滞后时间明显超过12D，给出了其红移的下限。
Accretion disc theory predicts that an AGN disc becomes self-gravitating and breaks up into stars at an outer radius $R_{\rm sg}$ ~ 12 light-days, with effectively no free parameter. We present evidence that the longer observed AGN light echoes are all close to 12d in the AGN rest frames. These observations give a stringent test of AGN disc theory. Further monitoring should offer insight into the formation angular momentum of the gas forming the disc. For distant AGN, observed lags significantly longer than 12d give lower limits on their redshifts.
