Image of a Kerr-Melvin black hole with a thin accretion disk

In this present work, we study the observational appearance of Kerr-Melvin black hole (KMBH) illuminated by an accretion disk. The disk is assumed to be located on equatorial plane and thin both geometrically optically. Considering fact that outside innermost stable circular orbit (ISCO) flow moves in prograde or retrograde falls toward horizon along plunging inside ISCO, develop numerical backward ray-tracing method obtain images KMBH accompanying with for various spins, strengths magnetic fields, inclination angles observers. We intensity distribution horizontally longitudinally show profiles redshift direct lensed images. Our suggests inner shadow critical curves can used estimate field around a without degeneration.