论文标题
OJ 287的主机星系通过光学和近红外成像揭示
The host galaxy of OJ 287 revealed by optical and near-infrared imaging
论文作者
论文摘要
Bl lacertae对象OJ 287（z = 0.306）每12年一次具有独特的双峰光学爆发，它为小型分离二进制二进制超级质量黑洞（SMBH）系统提供了一个最好的案例之一，具有极为巨大的原始日志（M_BH/M_SUN）〜10.3。但是，迄今为止在所有光学研究中，宿主星系尚未解决或仅在所有光学研究中检测到少量检测，这表明与凸起质量 - SMBH质量关系存在很大的偏差。当目标处于低状态时，我们已经获得了OJ〜287的深空分辨率I波段和K波段图像，这使我们能够检测到宿主星系。我们发现主机的宽带光度法与M_R = -22.5和M_K = -25.2的早期类型星系保持一致，将其放置在Bl lacertae对象的主体星系光度分布的中间。鉴于最近对附近星系中其他``过度质量的''黑洞的一些发现，因此中央超级黑洞显然对于那种光度的宿主星系显然是过分的，但不是前所未有的。
The BL Lacertae object OJ 287 (z = 0.306) has unique double-peaked optical outbursts every ~12 years, and it presents one of the best cases for a small-separation binary supermassive black hole (SMBH) system, with an extremely massive primary log (M_BH/M_Sun) ~ 10.3. However, the host galaxy is unresolved or only marginally detected in all optical studies so far, indicating a large deviation from the bulge mass - SMBH mass relation. We have obtained deep, high spatial resolution i-band and K-band images of OJ~287 when the target was in a low state, which enable us to detect the host galaxy. We find the broad-band photometry of the host to be consistent with an early type galaxy with M_R = -22.5 and M_K = -25.2, placing it in the middle of the host galaxy luminosity distribution of BL Lacertae objects. The central supermassive black hole is clearly overmassive for a host galaxy of that luminosity, but not unprecedented, given some recent findings of other ``overmassive'' black holes in nearby galaxies.
