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SPIN–ORBIT ALIGNMENT FOR THREE TRANSITING HOT JUPITERS: WASP-103b, WASP-87b, and WASP-66b

Addison, B C ; Tinney, C G ; Wright, D J ; Bayliss, D

The Astrophysical journal, 2016-05, Vol.823 (1), p.29-29 [Periódico revisado por pares]

United States

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  • Título:
    SPIN–ORBIT ALIGNMENT FOR THREE TRANSITING HOT JUPITERS: WASP-103b, WASP-87b, and WASP-66b
  • Autor: Addison, B C ; Tinney, C G ; Wright, D J ; Bayliss, D
  • Assuntos: Alignment ; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ; DISTANCE ; EVOLUTION ; Extrasolar planets ; Feeding ; Gas giant planets ; L-S COUPLING ; Optical fibers ; ORBITS ; Planets ; RADIAL VELOCITY ; SATELLITES ; STABILITY ; STARS ; TELESCOPES
  • É parte de: The Astrophysical journal, 2016-05, Vol.823 (1), p.29-29
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: We have measured the sky-projected spin-orbit alignments for three transiting hot Jupiters, WASP-103b, WASP-87b, and WASP-66b, using spectroscopic measurements of the Rossiter-McLaughlin effect, with the CYCLOPS2 optical fiber bundle system feeding the UCLES spectrograph on the Anglo-Australian Telescope. The resulting sky-projected spin-orbit angles of [lambda] = 3[degrees] + or - 33[degrees], [lambda] = -8[degrees] + or - 11[degrees], and [lambda] = -4[degrees] + or - 22[degrees] for WASP-103b, WASP-87b, and WASP-66b, respectively, suggest that these three planets are likely on nearly aligned orbits with respect to their host star's spin axis. WASP-103 is a particularly interesting system as its orbital distance is only 20% larger than its host star's Roche radius and the planet likely experiences strong tidal effects. WASP-87 and WASP-66 are hot (T sub(eff)= 6450 + or - 120 K and T sub(eff)= 6600 + or - 150 K, respectively) mid-F stars, making them similar to the majority of stars hosting planets on high-obliquity orbits. Moderate spin-orbit misalignments for WASP-103b and WASP-66b are consistent with our data, but polar and retrograde orbits are not favored for these systems.
  • Editor: United States
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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