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RZ Psc is a young Sun-like star, long associated with the UXor class ofvariable stars, which is partially or wholly dimmed by dust clumps severaltimes each year. The system has a bright and variable infrared excess, whichhas been interpreted as evidence that the dimming events are the passage ofasteroidal fragments in front of the host star. Here, we present a decade ofoptical photometry of RZ Psc and take a critical look at the asteroid beltinterpretation. We show that the distribution of light curve gradients isnon-uniform for deep events, which we interpret as possible evidence for anasteroidal fragment-like clump structure. However, the clumps are very likelyseen above a high optical depth mid-plane, so the disk's bulk clumpiness is notrevealed. While circumstantial evidence suggests an asteroid belt is moreplausible than a gas-rich transition disk, the evolutionary status remainsuncertain. We suggest that the rarity of Sun-like stars showing disk-relatedvariability may arise because i) any accretion streams are transparent, and/orii) turbulence above the inner rim is normally shadowed by a flared outer disk.

The transiting dust clumps in the evolved disk of the Sun-like UXor RZ Psc