X-ray coronae of stars: Recent results from Chandra Original Research Article

I summarize and comment upon studies of stellar coronae using the remarkable spectroscopic and imaging capabilities of the Chandra X-ray Observatory. Nearly all types of stars are detected as X-ray sources, except for the late-B to early-A stars and the cool giants and supergiants. Chandraʹs high resolution spectroscopy provides emission measure distributions, electron densities, coronal abundances, and tantilizing hints about the structure and evolution of stellar coronae. Chandraʹs high resolution imaging is resolving the crowded fields of young clusters into their constituent stars from massive O stars to brown dwarfs.