Near-infrared Variability of (Ultra) luminous Infrared Galaxies
Speaker: Shun Hatano (NAOJ/SOKENDAI)
Abstract:
The origin of infrared emission in ULIRGs—starburst or AGN—remains uncertain. Compactness is key for differentiation, but infrared imaging is limited to resolutions of ~10–100 pc. In this study, we utilize NEOWISE time-domain data to examine near-infrared variability of ULRIGs. We identify multiple ULIRGs showing significant near-infrared variability, despite not being classified as AGN on the BPT diagram.