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Evidence for a large exomoon orbiting Kepler-1625b.

ABSTRACT: Exomoons are the natural satellites of planets orbiting stars outside our solar system, of which there are currently no confirmed examples. We present new observations of a candidate exomoon associated with Kepler-1625b using the Hubble Space Telescope to validate or refute the moon's presence. We find evidence in favor of the moon hypothesis, based on timing deviations and a flux decrement from the star consistent with a large transiting exomoon. Self-consistent photodynamical modeling suggests that the planet is likely several Jupiter masses, while the exomoon has a mass and radius similar to Neptune. Since our inference is dominated by a single but highly precise Hubble epoch, we advocate for future monitoring of the system to check model predictions and confirm repetition of the moon-like signal.

SUBMITTER: Teachey A

PROVIDER: S-EPMC6170104 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature

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Evidence for a large exomoon orbiting Kepler-1625b.

Teachey Alex A Kipping David M DM

Science advances 20181003 10

Exomoons are the natural satellites of planets orbiting stars outside our solar system, of which there are currently no confirmed examples. We present new observations of a candidate exomoon associated with Kepler-1625b using the Hubble Space Telescope to validate or refute the moon's presence. We find evidence in favor of the moon hypothesis, based on timing deviations and a flux decrement from the star consistent with a large transiting exomoon. Self-consistent photodynamical modeling suggests ...[more]

PMID: 30306135

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Dataset Information

Evidence for a large exomoon orbiting Kepler-1625b.

Publications

Evidence for a large exomoon orbiting Kepler-1625b.

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