Evaporation of Jupiter-like planets orbiting extreme horizontal branch stars

Ealeal Bear; Noam Soker

doi:10.1111/j.1365-2966.2011.18527.x

Evaporation of Jupiter-like planets orbiting extreme horizontal branch stars

Ealeal Bear^*, Noam Soker

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

We study the evaporation of planets orbiting close to hot (extreme) horizontal branch (EHB) stars. These planets survived the common envelope phase inside the envelope of the red giant star progenitor. We find that Jupiter-like planets orbiting within ∼10R_⊙ from an EHB star suffer a non-negligible mass-loss during their ∼10⁸-yr evolution on the horizontal branch. The evaporated gas is ionized and becomes a source of Balmer lines. Such planets might be detected by the periodic variation of the Doppler shift of the Balmer lines.

Original language	English
Pages (from-to)	1788-1792
Number of pages	5
Journal	Monthly Notices of the Royal Astronomical Society
Volume	414
Issue number	2
DOIs	https://doi.org/10.1111/j.1365-2966.2011.18527.x
State	Published - Jun 2011
Externally published	Yes

Keywords

Planets and satellites: atmospheres
Stars: general
Stars: horizontal branch

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AB - We study the evaporation of planets orbiting close to hot (extreme) horizontal branch (EHB) stars. These planets survived the common envelope phase inside the envelope of the red giant star progenitor. We find that Jupiter-like planets orbiting within ∼10R⊙ from an EHB star suffer a non-negligible mass-loss during their ∼108-yr evolution on the horizontal branch. The evaporated gas is ionized and becomes a source of Balmer lines. Such planets might be detected by the periodic variation of the Doppler shift of the Balmer lines.

KW - Planets and satellites: atmospheres

KW - Stars: general

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