Direct imaging discovery of a Jovian exoplanet within a triple-star system (original) (raw)

ADS

;

• Apai, Dániel ;
• Kasper, Markus ;
• Kratter, Kaitlin ;
• McClure, Melissa ;
• Robberto, Massimo ;
• Beuzit, Jean-Luc

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 semimajor 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 multistar systems. HD 131399Ab is one of the lowest mass (4 ± 1 Jupiter masses) and coldest (850 ± 50 kelvin) exoplanets to have been directly imaged.

Publication:

Science

Pub Date:

August 2016

DOI:

10.1126/science.aaf9671

10.48550/arXiv.1607.02525

arXiv:

arXiv:1607.02525

Bibcode:

2016Sci...353..673W

Keywords:

• ASTRONOMY, PLANET SCI;
• Astrophysics - Earth and Planetary Astrophysics;
• Astrophysics - Solar and Stellar Astrophysics

E-Print:

Published via Science First Release on July 7, 2016