Determining Subparsec Supermassive Black Hole Binary Orbits with Infrared Interferometry-猫眼课题宝

DOI：

10.3847/1538-4357/abc24f

发表时间：

2020-10

期刊：

The Astrophysical Journal

影响因子：

通讯作者：

中科院分区：

其他

文献类型：

作者：

J. Dexter;D. Lutz;T. Shimizu;J. Shangguan;Richard I. Davies;P. T. de Zeeuw;E. Sturm;F. Eisenhauer;N. Förster-Schreiber;F. Gao;R. Genzel;S. Gillessen;O. Pfuhl;L. Tacconi;F. Widmann

径向速度监测揭示了一些类星体中存在移动的宽发射线，这可能表明亚秒差距双星系统的存在。相位参考的近红外干涉观测可以通过测量宽发射线和热尘埃连续体之间的光心差来绘制双星轨道。我们表明，几年的天体测量数据可能能够检测自行和加速度，从而确认二进制和约束系统参数的存在。当前候选者的亮度、红移和天体测量尺寸与升级后的甚大望远镜干涉仪/重力+仪器的功能非常匹配，我们确定了 10 个可能候选者的第一个样本。天体测量特征取决于超大质量黑洞双星系统中热尘埃发射的形态和演化。光心偏移的测量可以揭示双星运动，无论热尘埃发射区域是固定在环双星盘的内边缘，还是响应于吸积次级黑洞的不断变化的辐射模式而移动。

Radial-velocity monitoring has revealed the presence of moving broad emission lines in some quasars, potentially indicating the presence of a subparsec binary system. Phase-referenced, near-infrared interferometric observations could map out the binary orbit by measuring the photocenter difference between a broad emission line and the hot dust continuum. We show that astrometric data over several years may be able to detect proper motions and accelerations, confirming the presence of a binary and constraining system parameters. The brightness, redshifts, and astrometric sizes of current candidates are well matched to the capabilities of the upgraded Very Large Telescope Interferometer/GRAVITY+ instrument, and we identify a first sample of 10 possible candidates. The astrometric signature depends on the morphology and evolution of hot dust emission in supermassive black hole binary systems. Measurements of the photocenter offset may reveal binary motion whether the hot dust emission region is fixed to the inner edge of the circumbinary disk, or moves in response to the changing irradiation pattern from an accreting secondary black hole.

Determining Subparsec Supermassive Black Hole Binary Orbits with Infrared Interferometry

文献摘要

相似文献