http://arxiv.org/abs/1810.02362
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.
A. Teachey and D. Kipping
Mon, 8 Oct 18
23/43
Comments: 98 pages, 22 figures, 5 tables. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). Select data products available at this https URL
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