To send content items to your account,
please confirm that you agree to abide by our usage policies.
If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account.
Find out more about sending content to .
To send content items to your Kindle, first ensure firstname.lastname@example.org
is added to your Approved Personal Document E-mail List under your Personal Document Settings
on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part
of your Kindle email address below.
Find out more about sending to your Kindle.
Note you can select to send to either the @free.kindle.com or @kindle.com variations.
‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi.
‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
The classical nova outburst is one consequence of the accretion of hydrogen-rich material onto a white dwarf (WD) in a close binary system. Over long periods of time the accreting material gradually forms a layer of fuel on the WD and the bottom of this layer is gradually compressed and heated by the strong surface gravity of the WD. Ultimately, the bottom of the layer becomes electron-degenerate. The degeneracy of the material then contains the explosion so that, once nuclear burning in the layer bottom reaches thermonuclear runaway (TNR) conditions, the temperatures in the nuclear burning region will exceed 108 K under almost all circumstances. As a direct result, a major fraction of the nuclei in the envelope capable of capturing a proton (C, N, O, Ne, Mg …) are transformed into β+-unstable nuclei, which limits nuclear energy generation on the dynamical time-scale of the runaway and yields distinctively non-solar CNO isotopic abundance ratios in the ejected gases.
Observations of the outburst show that a classical nova explosively ejects metal enriched gas and grains and this material is a source of heavy elements for the interstellar medium (ISM). The observed amount of metal enrichment demands that mixing of the accreted material with core material occur at some time during the evolution of the outburst.
Email your librarian or administrator to recommend adding this to your organisation's collection.