Astronomy and Astrophysics – Astronomy
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21822104d&link_type=abstract
American Astronomical Society, AAS Meeting #218, #221.04; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
High-resolution Chandra and XMM-Newton grating spectra of bright novae in outburst, together with Swift low-resoluton monitoring, have provided remarkable new insights into the nature of the explosions themselves, and of the physical state and chemical composition of the residual "supersoft sources" that emerge from within an expanding shell of ejecta. One surprise is how different novae have appeared in X-rays, with the consequence that a unified picture of these explosions and their aftermath remains elusive. Early-phase hard X-ray emission, and supersoft source spectra that exhibit wild variations, are two examples of phenomena that remain unexplained. Further progress is hampered by the need to observe a larger sample of events at high-resolution and higher cadence to capture and probe the variety of behaviour observed. An instrument with an order of magnitude more power than current observatories would be poised to make the next breakthrough.
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