Very late thermal pulses influenced by accretion in planetary nebulae

Adam Frankowski, Noam Soker*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


We consider the possibility that a mass of ∼10- 5 - 10- 3 Mȯ flows back from the dense shell of planetary nebulae and is accreted by the central star during the planetary nebula phase. This backflowing mass is expected to have a significant specific angular momentum even in (rare) spherical planetary nebulae, such that a transient accretion disk might be formed. This mass might influence the occurrence and properties of a very late thermal pulse (VLTP), and might even trigger it. For example, the rapidly rotating outer layer, and the disk if still exist, might lead to axisymmetrical mass ejection by the VLTP. Unstable burning of accreted hydrogen might result in a mild flash of the hydrogen shell, also accompanied by axisymmetrical ejection.

Original languageEnglish
Pages (from-to)654-658
Number of pages5
JournalNew Astronomy
Issue number8
StatePublished - Nov 2009


  • (ISM:) planetary nebulae: general
  • Stars: AGB and post-AGB

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