Overview
- The international team reports an SZ-based detection in SPT2349-56 at redshift about 4.3, with results published on January 5 in Nature.
- The intracluster medium is at least five times hotter than predicted for such a young cluster, exceeding temperatures in many present-day systems.
- Observations with ALMA probed the cluster roughly 12 billion light-years away by measuring its distortion of the cosmic microwave background.
- SPT2349-56 packs more than 30 active galaxies within a roughly 500,000-light-year core that is forming stars thousands of times faster than the Milky Way.
- The authors point to energy injection from multiple supermassive black holes as the likely cause and will conduct follow-up searches and multiwavelength studies to assess how common this rapid heating is.