https://www.reddit.com/r/thalassophobia/comments/1t57q9d/found_out_about_this_nightmare_fuel_planet_today/
Wikipedia does not have an article specific to the TOI-1452 star. The URL redirects to a section of the TOI-1452 b article, which is about the Earth-like exoplanet orbiting the star.
The end of the epoch was marked by the Paleocene–Eocene Thermal Maximum (PETM), which was a major climatic event wherein about 2,500–4,500 gigatons of carbon were released into the atmosphere and ocean systems, causing a spike in global temperatures and ocean acidification.