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We study recent Intermediate Luminosity Optical Transients (ILOTs) and majoreruptions of Luminous Blue Variables (LBVs), and strengthen claims for asimilar mechanism powering both. This process is a short duration release ofgravitational energy in a binary system. In some ILOTs a merger occurs and oneof the stars does not survive the transient event, e.g., V838 Mon and V1309Sco. In some transient events a rapid and short mass transfer process takesplace and the two stars survive the transient event, e.g., the Great Eruptionof Eta Carinae. We study new ILOTs and reanalyze known ones in light of newobservations and models. We reach our conclusion by analyzing these ILOTs usingthe Energy-Time Diagram (ETD) where we plot the total energy of the eruptionagainst its eruption timescale. ILOTs and major LBV eruptions occupy theOptical Transient Stripe (OTS) in the ETD. The upper boundary of the stripe isexplained by our proposed model where a main sequence (or a slightly off-mainsequence) star accretes at a very high rate (<~ 1 M_\odot yr^{-1}) from acompanion. We identify one LBV, NGC 3432 OT, with two eruptions; one with weaktotal energy and the other with large total energy. It bridges the regions ofthe ILOTs and LBVs in the OTS. We further study the ILOT M85 OT2006 and showthat it cannot be a nova, even not an extreme one. We build a model where ILOTscan become optically thin in a timescale of few years and the inflated envelopecollapses into an accretion disk around the star. Such an ILOT will evolveblue-ward after few years.

Common Powering Mechanism of Intermediate Luminosity Optical Transients and Luminous Blue Variables