Kavli Affiliate: John Carlstrom | Summary:Event Horizon Telescope (EHT) images of the supermassive black hole M87* depict an asymmetric ring of emission. General relativistic magnetohydrodynamic (GRMHD) models of M87* and its accretion disk predict that the amplitude and location of the ring’s peak brightness asymmetry should fluctuate due to turbulence in the source plasma. We […]
Kavli Affiliate: Thomas Crawford | Summary:Event Horizon Telescope (EHT) images of the supermassive black hole M87* depict an asymmetric ring of emission. General relativistic magnetohydrodynamic (GRMHD) models of M87* and its accretion disk predict that the amplitude and location of the ring’s peak brightness asymmetry should fluctuate due to turbulence in the source plasma. We […]
Kavli Affiliate: Sara Seager | Summary:Early JWST observations of TRAPPIST-1 have revealed an unexpected puzzle: energetic white-light flares ($rmE > 10^30$ erg) reach temperatures of only $sim$3500–4000,K, nearly three times cooler than typical solar flares, which peak around 9000–10000,K. Here we explain this difference by identifying the physical mechanism that regulates flare temperatures on late […]