Speckle Imaging Excludes Low-Mass Companions Orbiting the Exoplanet Host Star TRAPPIST-1
arXiv:1610.05269 · doi:10.3847/2041-8205/829/1/L2
Abstract
We have obtained the highest resolution images available of TRAPPIST-1 using the Gemini-South telescope and our speckle imaging camera. Observing at 692 and 883 nm, we reached the diffraction limit of the telescope providing a best resolution of 27 mas or, at the distance of TRAPPIST-1, a spatial resolution of 0.32 AU. Our imaging of the star extends from 0.32 to 14.5 AU. We show that to a high confidence level, we can exclude all possible stellar and brown dwarf companions, indicating that TRAPPIST-1 is a single star.
Accepted in ApJ Letters, 13 Sept. 2016 issue
References in corpus (4)
- The K2 Mission: Characterization and Early results
- The Solar Neighborhood XXXV: Distances to 1404 M Dwarf Systems Within 25 pc in the Southern Sky
- Most Sub-Arcsecond Companions of Kepler Exoplanet Candidate Host Stars are Gravitationally Bound
- Near-Infrared Detection and Characterization of the Exoplanet HD 95086 b with the Gemini Planet Imager
Cited by in corpus (15)
- GJ 367b: A dense ultra-short period sub-Earth planet transiting a nearby red dwarf star
- Two temperate super-Earths transiting a nearby late-type M dwarf
- The Densities of Planets in Multiple Stellar Systems
- Two young planetary systems around field stars with ages between 20-320 Myr from TESS
- A pair of Sub-Neptunes transiting the bright K-dwarf TOI-1064 characterised with CHEOPS
- Evidence for Spin-orbit Alignment in the TRAPPIST-1 System
- HATS-74Ab, HATS-75b, HATS-76b and HATS-77b: Four Transiting Giant Planets around K and M Dwarfs
- Detection of Planetary and Stellar Companions to Neighboring Stars via a Combination of Radial Velocity and Direct Imaging Techniques
- A super-Earth and a mini-Neptune near the 2:1 MMR straddling the radius valley around the nearby mid-M dwarf TOI-2096
- A Mini-Neptune from TESS and CHEOPS Around the 120 Myr Old AB Dor member HIP 94235
- TESS discovery of a sub-Neptune orbiting a mid-M dwarf TOI-2136
- The young mini-Neptune HD 207496b that is either a naked core or on the verge of becoming one
- The HD 93963 A transiting system: A 1.04d super-Earth and a 3.65 d sub-Neptune discovered by TESS and CHEOPS
- A close-in puffy Neptune with hidden friends: The enigma of TOI 620
- The TESS-Keck Survey. XI. Mass Measurements for Four Transiting sub-Neptunes orbiting K dwarf TOI-1246