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Stars can either be formed in or captured by the accretion disks in ActiveGalactic Nuclei (AGN). These AGN stars are irradiated and subject to extremelevels of accretion, which can turn even low-mass stars into very massive ones($M > 100 {\rm M}_\odot$) whose evolution may result in the formation ofmassive compact objects ($M > 10 {\rm M}_\odot$). Here we explore the spins ofthese AGN stars and the remnants they leave behind. We find that AGN starsrapidly spin up via accretion, eventually reaching near-critical rotationrates. They further maintain near-critical rotation even as they shed theirenvelopes, become compact, and undergo late stages of burning. This makes themgood candidates to produce high-spin massive black holes, such as the ones seenby LIGO-Virgo in GW190521g, as well as long Gamma Ray Bursts (GRBs) and theassociated chemical pollution of the AGN disk.

Stellar Evolution in the Disks of Active Galactic Nuclei Produces Rapidly Rotating Massive Stars