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Several "hot Jupiter" host stars appear to exhibit enhanced chromosphericactivity, coronal flaring, and starspot development synchronized to theirplanetary orbits. These effects have been attributed to tidal and/or magneticinteractions between the star and exoplanet. The best studied among suchsystems is HD 189733, which has previously been observed from radio to X-raywavelengths. Here, I present ~4.75 GHz Arecibo radio telescope observations ofHD 189733 during a fraction of the exoplanet orbital phase range previouslyassociated with enhanced coronal X-ray flaring. No radio flares from the lowercorona were detected. I also leverage Microvariability and Oscillations ofStars, Automated Photoelectric Telescope, and Wise photometry to measure theoccurences of minima associated with enhanced starspot activity. The phasing ofthese minima with the exoplanet orbit does not reveal any synchronized activeregion behavior. Moreover, for the first time, I combine X-ray, ultraviolet,photometric, Ca II H&K, H-alpha, and radio observations of HD 189733 to conductan extensive, holistic reexamination of stellar activity in this system.Through the presentation of new data, and by merging physical and statisticalanalytic approaches, I demonstrate that the previously asserted enhancements inactivity, allegedly synchronized to certain exoplanet orbital phases, arelikely the result of inadequately sampled intrinsic stellar activity from anactive star, rather than star-planet interactions.

The Rise of ROME. I. A Multiwavelength Analysis of the Star-Planet Interaction in the HD 189733 System