Black-hole reflection spectroscopy
= Black-hole reflection spectroscopy
An inference from <radiation> reflected by an irradiated <accretion disc>, including iron-line and continuum features. <Doppler effects>, <gravitational redshift> and ray propagation determine its profile. Associating the innermost reflecting <radius> with the <innermost stable circular orbit> can constrain spin, conditional on illumination, ionization, abundance, inclination and disk structure.