Direct Imaging of a Large Dwarf Nova Shell

Details Direct Imaging of a Large Dwarf Nova Shell Direct Imaging of a Large Dwarf Nova Shell

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...20515901s&link_type=abstract

American Astronomical Society Meeting 205, #159.01; Bulletin of the American Astronomical Society, Vol. 36, p.1610

Astronomy and Astrophysics

Astronomy

Scientific paper

Despite the spectrographic evidence for wind-driven mass loss from erupting dwarf novae, almost no visible shells surrounding these systems have ever been detected. Theory predicts that the white dwarfs in all dwarf novae must eventually accrete enough mass to undergo classical nova eruptions, but not a single dwarf nova has ever been shown to have undergone a classical nova eruption. Here we report observations that show a huge gas shell around a nearby prototypical dwarf nova. The shell is an order of magnitude more extended than any ever detected around any classical nova. The derived shell mass matches that of classical novae, and is inconsistent with the mass expected from a steady dwarf nova wind.

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