Journal Article

Evaporation of Jupiter-like planets orbiting extreme horizontal branch stars

Ealeal Bear and Noam Soker

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 414, issue 2, pages 1788-1792
Published in print June 2011 | ISSN: 0035-8711
Published online June 2011 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2011.18527.x
Evaporation of Jupiter-like planets orbiting extreme horizontal branch stars

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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 ∼10 R 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.

Keywords: planets and satellites: atmospheres; stars: general; stars: horizontal branch

Journal Article.  4472 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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