Direct imaging discovery of a Jovian exoplanet within a triple-star system

Kevin Wagner, Daniel Apai, Markus Kasper, Kaitlin Kratter, Melissa McClure, Massimo Robberto, Jean Luc Beuzit

Research output: Contribution to journalArticle

43 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)673-678
Number of pages6
Issue number6300
StatePublished - Aug 12 2016


ASJC Scopus subject areas

  • Medicine(all)
  • General

Cite this

Wagner, K., Apai, D., Kasper, M., Kratter, K., McClure, M., Robberto, M., & Beuzit, J. L. (2016). Direct imaging discovery of a Jovian exoplanet within a triple-star system. Science, 353(6300), 673-678.