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We assess broadband color filters for the two fast cameras on the PLAnetaryTransits and Oscillations (PLATO) of stars space mission with respect toexoplanetary atmospheric characterization. We focus on Ultra Hot Jupiters andHot Jupiters placed 25pc and 100pc away from the Earth and low mass low densityplanets placed 10pc and 25pc away. Our analysis takes as input literaturevalues for the difference in transit depth between the broadband lower (500 to675nm) wavelength interval (hereafter referred to as blue) and the upper(675-1125nm) broadband wavelength interval (hereafter referred to as red) fortransmission, occultation and phase curve analyses. Planets orbiting mainsequence central stars with stellar classes F, G, K and M are investigated. Wecalculate the signal-to-noise ratio with respect to photon and instrument noisefor detecting the difference in transit depth between the two spectralintervals. Results suggest that bulk atmospheric composition and planetarygeometric albedos could be detected for (Ultra) Hot Jupiters up to about 100pc(about 25pc) with strong (moderate) Rayleigh extinction. Phase curveinformation could be extracted for Ultra Hot Jupiters orbiting K and G dwarfstars up to 25pc away. For low mass low density planets, basic atmospherictypes (primary and water-dominated) and the presence of sub-micron hazes in theupper atmosphere could be distinguished for up to a handful of cases up toabout 10pc.

Atmospheric Characterization via Broadband Color Filters on the PLAnetary Transits and Oscillations of stars (PLATO) Mission