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23 April 2024 |
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Article overview
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A Third Exoplanetary System with Misaligned Orbital and Stellar Spin Axes | | John A. Johnson
; Joshua N. Winn
; Simon Albrecht
; Andrew W. Howard
; Geoffrey W. Marcy
; J. Zachary Gazak
; | | Date: |
30 Jul 2009 | | Abstract: | We present evidence that the WASP-14 exoplanetary system has misaligned
orbital and stellar-rotational axes, with an angle lambda = 33.1 +/- 7.4 deg
between their sky projections. The evidence is based on spectroscopic
observations of the Rossiter-McLaughlin effect as well as new photometric
observations. WASP-14 is now the third system known to have a significant
spin-orbit misalignment, and all three systems have "super-Jupiter" planets
(M_P > 3 Mjup) and eccentric orbits. This finding suggests that the migration
and subsequent orbital evolution of massive, eccentric exoplanets is somehow
different from that of less massive close-in Jupiters, the majority of which
have well-aligned orbits. | | Source: | arXiv, 0907.5204 | | Services: | Forum | Review | PDF | Favorites | |
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