在可变TADAF情景下重新解释GRS 1915+105的观测
Re-interpreting the GRS 1915+105 observations within the variable TADAF scenario
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中文总结 AI 辅助
该研究利用可变TADAF模型重新解释微类星体GRS 1915+105的多样观测现象，包括X射线光变、喷流位置角偏移等，并提出Lense-Thirring效应导致喷流偏移的机制，可推广至其他源。
中文摘要 AI 辅助
银河系微类星体GRS 1915+105是最有趣的X射线双星系统之一，展现出极其多样的观测现象。它显示出最复杂且多变的X射线光变曲线，并携带超光速射电喷流。其X射线和射电流量在从秒到分钟、天甚至更长的时间尺度上变化。近年来，其喷流还表现出大的位置角偏移。我们发现，大多数观测现象都可以在我们新发展的可变湍流ADAF（TADAF）模型中得到很好的解释。吸积盘由一个外部薄盘和一个不稳定的内部TADAF环组成，其大小是可变的。先前提出的内盘“消失”和重新出现被理解为厚TADAF与薄盘之间的转变。某些类型的类星体（QSOs）可以用TADAF环的半径变化来理解。喷流位置角偏移被理解为倾斜、旋转黑洞的Lense-Thirring效应对喷流产生的直接侧向参考系拖拽。喷流射出速度越慢，角度偏移越大。我们注意到这种效应也适用于其他源，如天鹅座V404和活动星系核M87。这一机制也可能适用于SS 433中著名的“进动”喷流。
英文摘要
The Galactic microquasar GRS 1915+105 is one of the most interesting X-ray binary systems, exhibiting an exceptionally diverse range of observational phenomena. It displays the most complicated and variable X-ray light curves and carries superluminal radio jets. Its X-ray and radio fluxes change on very different timescales, from seconds to minutes to days and even longer. In recent years, its jet has also displayed large position angle shifts. We find that most of the observational phenomena can be well explained within our newly developed variable turbulent ADAF (TADAF) model. The accretion disk is composed of an outer thin disk and an unstable inner TADAF torus whose size is variable. The previously suggested 'disappearance' and regain of the inner disk is understood as the transition between the thick TADAF and the thin disk. Some types of QSOs are understood in terms of the radius change of the TADAF torus. The jet position angle shift is understood as the direct sideways frame-dragging on the jet by the Lense-Thirring effect from a tilted, spinning black hole. The slower the outshooting jet, the larger the angle shift. We note that such an effect also applies to other sources, such as V404 Cygni and the AGN M87. This mechanism may also be applicable to the famous 'precessing' jet in SS 433.
发表机构
- Shanghai Astronomical Observatory, Chinese Academy of Sciences（中国科学院上海天文台）
机构由 AI 辅助整理，请以论文原文为准。
