Direct Imaging Discovery of a Jovian Exoplanet Within a Triple Star System

Abstract

Direct imaging allows for the detection and characterization of exoplanets via their thermal emission. We report the discovery via imaging of a young Jovian planet in a triple star system and characterize its atmospheric properties through near-infrared spectroscopy. The semi-major axis of the planet is closer relative to that of its hierarchical triple star system than for any known exoplanet within a stellar binary or triple, making HD 131399 dynamically unlike any other known system. The location of HD 131399Ab on a wide orbit in a triple system demonstrates that massive planets may be found on long and possibly unstable orbits in multi-star systems. HD 131399Ab is one of the lowest mass (4+/-1 MJup) and coldest (850+/-50 K) exoplanets to have been directly imaged.

References in corpus (9)

• Dynamical Outcomes of Planet-Planet Scattering
• On the Luminosity of Young Jupiters
• Five Planets Orbiting 55 Cancri
• The Planetary Mass Companion 2MASS1207-3932 B: Temperature, Mass and Evidence for an Edge-On Disk
• The primordial binary population II: Recovering the binary population for intermediate mass stars in Sco OB2
• Multi-order TODCOR: application to observations taken with the CORALIE echelle spectrograph
• Direct detection of exoplanet host star companion gamma Cep B and revised masses for both stars and the sub-stellar object
• Planet formation in stellar binaries II: overcoming the fragmentation barrier in alpha Centauri and gamma Cephei-like systems
• The role of the energy equation in the fragmentation of protostellar discs during stellar encounters

Cited by in corpus (29)

• Shadows and spirals in the protoplanetary disk HD 100453
• Multiple Disk Gaps and Rings Generated by a Single Super-Earth
• orbitize!: A Comprehensive Orbit-fitting Software Package for the High-contrast Imaging Community
• Direct detection of scattered light gaps in the transitional disk around HD 97048 with VLT/SPHERE
• Characterizing 51 Eri b from 1-5 $\mu$m: a partly-cloudy exoplanet
• Direct Imaging and Astrometric Detection of a Gas Giant Planet Orbiting an Accelerating Star
• Evolution of Gas Giant Entropy During Formation by Runaway Accretion
• Sulfur Hazes in Giant Exoplanet Atmospheres: Impacts on Reflected Light Spectra
• Cloud Atlas: Discovery of Patchy Clouds and High-amplitude Rotational Modulations In a Young, Extremely Red L-type Brown Dwarf
• Effects of Latent Heating on Atmospheres of Brown Dwarfs and Directly Imaged Planets
• A HARPS RV search for planets around young nearby stars
• The B-Star Exoplanet Abundance Study: a co-moving 16-25 Mjup companion to the young binary system HIP 79098
• PSYM-WIDE: a survey for large-separation planetary-mass companions to late spectral type members of young moving groups
• Orbiting a binary: SPHERE characterisation of the HD 284149 system
• A high precision technique to correct for residual atmospheric dispersion in high-contrast imaging systems
• Phase Quantization Study of Spatial Light Modulator for Extreme High contrast Imaging
• Implementing focal-plane phase masks optimized for real telescope apertures with SLM-based digital adaptive coronagraphy
• The unstable fate of the planet orbiting the A-star in the HD 131399 triple stellar system
• Experimental test of a 40 cm-long R=100 000 spectrometer for exoplanet characterisation
• The Scorpion Planet Survey: Wide-Orbit Giant Planets Around Young A-type Stars
• An Early Catalog of Planet Hosting Multiple Star Systems of Order Three and Higher
• KELT-17: a chemically peculiar Am star and a hot-Jupiter planet
• Irregular Fixation: I. Fixed points and librating orbits of the Brown Hamiltonian
• PeX 1. Multi-spectral expansion of residual speckles for planet detection
• On-sky closed loop correction of atmospheric dispersion for high-contrast coronagraphy and astrometry
• NA-SODINN: a deep learning algorithm for exoplanet image detection based on residual noise regimes
• Candidate exoplanet host HD131399A: a nascent Am star
• YSES 2b is a background star: Differential astrometric M-dwarf measurements in time
• Formation of wide-orbit gas giants near the stability limit in multi-stellar systems