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

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Title: Direct imaging discovery of a Jovian exoplanet within a triple-star system.
Authors: Wagner, Kevin (AUTHOR), Apai, Dániel (AUTHOR), Kasper, Markus (AUTHOR), Kratter, Kaitlin (AUTHOR), McClure, Melissa (AUTHOR), Robberto, Massimo (AUTHOR), Beuzit, Jean-Luc (AUTHOR)
Source: Science (pre-March 2025). 8/12/2016, Vol. 353 Issue 6300, p673-678. 6p. 2 Color Photographs, 1 Chart, 3 Graphs.
Subjects: Extrasolar planets, Gas giants, Multiple stars, Infrared astronomy, Infrared spectroscopy, Extrasolar planetary orbits, Atmospheres of extrasolar planets
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. [ABSTRACT FROM AUTHOR]
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Database: Psychology and Behavioral Sciences Collection
Description
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. [ABSTRACT FROM AUTHOR]
ISSN:00368075
DOI:10.1126/science.aaf9671