WASP-20 is a close visual binary with a transiting hot Jupiter
Daniel Evans, John Southworth, Barry Smalley

TL;DR
The paper reveals that WASP-20 is a binary star system with a transiting hot Jupiter, and reanalyzes previous data to confirm the planet orbits the primary star, affecting its measured properties.
Contribution
It is the first to identify WASP-20 as a binary system and to analyze the planetary transit scenario considering both stellar components.
Findings
WASP-20 is a binary separated by 0.2578 arcseconds.
The planetary transit most likely occurs around the primary star.
Reanalysis increases the planet's mass and radius estimates.
Abstract
We announce the discovery that WASP-20 is a binary stellar system, consisting of two components separated by on the sky, with a flux ratio of in the -band. It has previously been assumed that the system consists of a single F9 V star, with photometric and radial velocity signals consistent with a low-density transiting giant planet. With a projected separation of approximately au between the two components, the detected planetary signals almost certainly originate from the brighter of the two stars. We reanalyse previous observations allowing for two scenarios, `planet transits A' and `planet transits B', finding that both cases remain consistent with a transiting gas giant. However, we rule out the `planet transits B' scenario because the observed transit duration requires star B to be significantly evolved, and therefore have…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
