Planets around extreme horizontal branch stars

Ealeal Bear*, Noam Soker

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations


We review three main results of our recent study: • We show that a proper treatment of the tidal interaction prior to the onset of the common envelope (CE) leads to an enhance mass loss. This might increase the survivability of planets and brown dwarfs that enter a CE phase. • From the distribution of planets around main sequence stars, we conclude that around many sdB/sdO stars more than one planet might be present. One of these might have a close orbit and the others at about orbital periods of years or more. • We show that the intense ionizing flux of the extreme horizontal branch star might evaporate large quantities of a very close surviving substellar object. Balmer emission lines from the evaporated gas can be detected via their Doppler shifts.

Original languageEnglish
Title of host publicationPlanetary Systems Beyond the Main Sequence - Proceedings of the International Conference "Planetary Systems Beyond the Main Sequence"
Number of pages8
StatePublished - 2011
Externally publishedYes
EventInternational Conference "Planetary Systems Beyond the Main Sequence" - Bamberg, Germany
Duration: 11 Aug 201014 Aug 2010

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


ConferenceInternational Conference "Planetary Systems Beyond the Main Sequence"


  • Horizontal Branch
  • planets

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