General-relativistic ray-tracing shows that non-flat accretion disk geometries systematically bias iron Kα-derived black hole spin, coronal height, and inclination estimates when fit with flat-disk models.
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The Effects of Complex Accretion Disk Geometry on Broadened Iron K$\alpha$ Lines
General-relativistic ray-tracing shows that non-flat accretion disk geometries systematically bias iron Kα-derived black hole spin, coronal height, and inclination estimates when fit with flat-disk models.