Based on the horizon-scale magnetofluid model developed in [1], we investigate the millimeter-wave images of a geometrically thick accretion disk or a funnel wall, i.e., the magnetofluid that encloses the base of the jet region, around a Kerr black hole. By employing the numerical method to solve the null geodesic and radiative transfer equations, we obtain the optical appearances at various observational angles and frequencies, generated by the thermal synchrotron radiation within the magnetofluid. For the thick disk, we specifically examine the impact of emission anisotropy on images, concluding that anisotropic synchrotron radiation could play an important role in the observability of the photon ring. For the funnel wall, we find that both the outflow and inflow funnel walls exhibit annular structures on the imaging plane. The outflow funnel wall yields a brighter primary image than the photon ring, whereas the inflow one does not. Based on our investigation, the inflow funnel wall model can not be ruled out by current observations of M87*.

中文翻译：

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对黑洞周围的厚吸积盘和喷流进行成像

基于[1]中开发的地平尺度磁流体模型，我们研究了几何厚度的吸积盘或漏斗壁的毫米波图像，即包围克尔黑洞周围喷流区域底部的磁流体。通过采用数值方法求解零测地线和辐射传输方程，我们获得了磁流体内热同步辐射产生的不同观测角度和频率下的光学外观。对于厚圆盘，我们专门研究了发射各向异性对图像的影响，得出的结论是各向异性同步加速器辐射可能在光子环的可观测性中发挥重要作用。对于漏斗壁，我们发现流出漏斗壁和流入漏斗壁在成像平面上都呈现环形结构。流出漏斗壁产生比光子环更亮的初级图像，而流入漏斗壁则不能。根据我们的调查，目前对 M87* 的观测并不能排除流入漏斗壁模型。