Intermediate luminosity optical transients during the grazing envelope evolution (GEE)

Noam Soker*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

By comparing photon diffusion time with gas outflow time, I argue that a large fraction of the energy carried by the jets during the grazing envelope evolution (GEE) might end in radiation, hence leading to an intermediate luminosity optical transient (ILOT). In the GEE a companion orbiting near the outskirts of the larger primary star accretes mass through an accretion disk, and launches jets that efficiently remove the envelope gas from the vicinity of the secondary star. In cases of high mass accretion rates onto the stellar companion the energy carried by the jets surpass the recombination energy from the ejected mass, and when the primary star is a giant this energy surpasses also the gravitational binding energy of the binary system. Some future ILOTs of giant stars might be better explained by the GEE than by merger and common envelope evolution without jets.

Original languageEnglish
Pages (from-to)16-18
Number of pages3
JournalNew Astronomy
Volume47
DOIs
StatePublished - 1 Aug 2016
Externally publishedYes

Keywords

  • Binaries: close
  • Outflows
  • Stars: AGB and post-AGB
  • Stars: variables: general
  • Stars: winds

Fingerprint Dive into the research topics of 'Intermediate luminosity optical transients during the grazing envelope evolution (GEE)'. Together they form a unique fingerprint.

Cite this