The effects of planets and brown dwarfs on stellar rotation and mass loss

Mario Livio*, Noam Soker

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

We examine the effects of the engulfment of planets by giant stars on the evolution of late-type stars. We show that the rate at which dynamo-generated magnetic energy is being released exceeds 10% of the wind kinetic energy when the orbital angular momentum of the engulfed planet is more than 10 times the angular momentum of the star as it leaves the main sequence. A significant enhancement in the mass-loss rate may be expected in this case, owing to the formation of cool magnetic spots. We use the existing sample of extrasolar planets to estimate that at least 3.5% of the evolved solar-type stars will be significantly affected by the presence of planetary companions.

Original languageEnglish
Pages (from-to)L161-L164
JournalAstrophysical Journal
Volume571
Issue number2 II
DOIs
StatePublished - 1 Jun 2002
Externally publishedYes

Keywords

  • Planetary systems
  • Stars: evolution
  • Stars: low-mass, brown dwarfs
  • Stars: magnetic fields
  • Stars: mass loss
  • Stars: statistics

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