CP Puppis, a template for the secular evolution of novae

Physics

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Scientific paper

We propose a Chandra HETG observation of the extraordinary quiescent nova CP Puppis, to follow up on our XMM-Newton study. The HETG spectrum will provide a tighter constraint on the cooling flow model fit, which we have used to infer the white dwarf mass and the mass accretion rate in this nova, testing the theory of nova outbursts. Chandra will allow us to spatially resolve the nova shell, and to understand whether the O VII triplet originates in the shell or whether photoionization is important. We will perform sensitive diagnostics using a wide range of lines. CP Puppis offers a unique possibility to prove the dependence of the thermonuclear burning evolution on the physical parameters of the system.

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