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Two-ribbon brightenings are one of the most remarkable characteristics of aneruptive solar flare and are often used for predicting the occurrence ofcoronal mass ejections (CMEs). Nevertheless, it was called in question recentlywhether all two-ribbon flares are eruptive. In this paper, we investigate a tworibbon-like white-light (WL) flare that is associated with a failed magneticflux rope (MFR) eruption on 2015 January 13, which has no accompanying CME inthe WL coronagraph. Observations by \textit{Optical and Near-infrared SolarEruption Tracer} and \textit{Solar Dynamics Observatory} reveal that, with theincrease of the flare emission and the acceleration of the unsuccessfullyerupting MFR, two isolated kernels appear at the WL 3600 {\AA} passband andquickly develop into two elongated ribbon-like structures. The evolution of theWL continuum enhancement is completely coincident in time with the variation of\textit{Fermi} hard X-ray 26--50 keV flux. Increase of continuum emission isalso clearly visible at the whole FUV and NUV passbands observed by\textit{Interface Region Imaging Spectrograph}. Moreover, in one WL kernel, the\ion{Si}{4}, \ion{C}{2}, and \ion{Mg}{2} h/k lines display significantenhancement and non-thermal broadening. However, their Doppler velocity patternis location-dependent. At the strongly bright pixels, these lines exhibit ablueshift; while at moderately bright ones, the lines are generally redshifted.These results show that the failed MFR eruption is also able to produce atwo-ribbon flare and high-energy electrons that heat the lower atmosphere,causing the enhancement of the WL and FUV/NUV continuum emissions andchromospheric evaporation.

A Two-ribbon White-light Flare Associated with a Failed Solar Eruption Observed by ONSET, SDO, and IRIS