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Irradiation phenomena in young solar-type stars and the early solar system: X-ray observations and γ-ray constraints

Montmerle, Thierry

The high levels of X-ray flaring activity observed in young stars and protostars suggest correspondingly high levels of low-energy particle irradiation of their circumstellar disks, and hence of early solar system material like meteorites. We first briefly review the latest X-ray observational results obtained by Chandra and XMM-Newton on two 'typ…

X-ray spectroscopy of supernova remnants

Ballet, Jean; Decourchelle, Anne

The new generation X-ray telescopes launched in 1999 ( Chandra and XMM-Newton) provide for the first time, good spatial and spectral resolution together, allowing to map emission lines of heavy elements in supernova remnants. In young supernova remnants this reflects nucleosynthesis in the progenitor, and gives access (in theory) to the absolute a…