Effect of the reverse shock on the parameters of the observed X-Ray emission during the 1998 outburst of CI Cam

TL;DR

This study models the interaction of ejected nova matter with the stellar wind in CI Cam, showing the reverse shock's limited heating effect and its negligible contribution to observed X-ray emission.

Contribution

It introduces a model analyzing the reverse shock's impact on X-ray emission parameters during CI Cam's 1998 outburst, highlighting the shock's limited heating role.

Findings

Ejected matter had no steep velocity gradients.

Reverse shock heated matter to ~0.1 keV.

Ejected matter did not significantly affect 3-20 keV X-ray emission.

Abstract

Based on the model of interaction between spherically symmetrical expanding matter and the external medium, we have estimated the parameters of the matter heated by the shock that was produced in the envelope ejected by the explosion of a classical nova during its interaction with the stellar wind from the optical companion. Using this model, we have shown that the matter ejected during the outburst in the system CI Cam had no steep velocity gradients and that the reverse shock could heat the ejected matter only to a temperature of ~0.1 keV. Therefore, this matter did not contribute to the mean temperature and luminosity of the system observed in the energy range 3-20 keV.