Classical Novae in the Swift Era

Details Classical Novae in the Swift Era Classical Novae in the Swift Era

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008head...10.1904s&link_type=abstract

American Astronomical Society, HEAD meeting #10, #19.04

Astronomy and Astrophysics

Astronomy

Scientific paper

One of the highlights of Swift is that it is a remarkably responsive spacecraft both because of its design and because Neil Gehrels, the PI, is attuned to the great science that can be done with Targets of Opportunity. As a result, we have made important and significant discoveries about the X-ray evolution of Cataclysmic Variables (CV) in general and both Classical (CN) and Recurrent Novae (RN) in particular. Before Swift, both CN and RN were known to emit in both hard and soft X-rays but observations were few, with only a small number of CNe followed through their X-ray bright phase. We have now extended X-ray observations to many more CNe which has answered some questions and, at least as important, posed new questions about the evolution of the explosion. I emphasize that X-ray observations are the only means of following the evolution of the nuclear-burning white dwarf during the outburst. I will review our observations of CN and concentrate on the SSS phase in which the X-ray emission is coming from hot, nuclear-burning, white dwarf outer layers and atmosphere. I will present a brief summary of our results on the 2006 outburst of RS Oph in which a RN was detected with the BAT and then, later, we observed the turn-on of the SSS phase some 26 days into outburst. Finally, I will discuss V723 Cas (1995) which now holds the record for the longest CN observed in outburst in X-rays. I gratefully acknowledge partial support from NSF and NASA grants to ASU and to the members of the Swift-NOVA-CV working group who obtained, extracted, and analyzed the data that I will be presenting.

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