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Is it possible for a massive star of more than 1.4 solar masses (probably around 3 or more but below the threshold for type II) to collapse into a white dwarf and a planetary nebula, then go supernova as the ejected material falls back onto the white dwarf?

Edit: Have there been any candidates for such an event?

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    $\begingroup$ Why would the ejected material fall back? $\endgroup$
    – Peter Erwin
    Commented Oct 28, 2021 at 14:30
  • $\begingroup$ Yes this is plausible, but uncertain. @PeterErwin the ejected matter might not have enough momentum to fully escape the gravitational potential of the collapsing star. iopscience.iop.org/article/10.1086/307119/fulltext/… $\endgroup$
    – Daddy Kropotkin
    Commented Oct 28, 2021 at 15:16
  • $\begingroup$ @DaddyKropotkin That article is about "accretion-induced collapse", where the accreted matter comes via mass transfer from a close binary companion. It has nothing to do with whether planetary nebula ejecta could somehow fall back. $\endgroup$
    – Peter Erwin
    Commented Oct 28, 2021 at 17:45
  • $\begingroup$ @PeterErwin "Fall back" is a rather vague phrase. An accretion disk could develop from the planetary nebula. astronomy.stackexchange.com/questions/29102/… Also, if matter could be transferred to the WD from a companion, then one, perhaps naively, might expect that a planetary nebula or common envelope could induce accretion. $\endgroup$
    – Daddy Kropotkin
    Commented Oct 30, 2021 at 14:04

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