HD 131399 A b is the proposed exoplanet of the star HD 131399 A , which is part of the triple star system HD 131399 . Located in 320 ± 23 St. years from the Sun in the constellation Centaurus [1] . The other two stars B and C revolve around the common center of mass and together around the star HD 131399 A.
| HD 131399 A b | |
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| Opening | |
| opening date | |
| Orbital characteristics | |
| physical characteristics | |
Observations of the object showed that it has a spectral class later than L0, and maybe K or M. The proper motion of the “planet” does not coincide with the motion of the star HD 131399 A [2] .
Estimated Features
It was assumed that the planet is about 16 million years old, its mass is 4 ± 1 masses of Jupiter , and the temperature is 850 ± 50 K (580 ± 50 ° C). In this case, it would be one of the coldest and least massive exoplanets that could be photographed [1] [3] . Analysis in the near infrared spectrum (1.4–1.6 μm) showed that the atmosphere consists of water and methane. Scientists believe that life on it is unlikely due to the lack of a solid surface, liquid water and the presence of strong winds, as well as periodic rains of liquid iron in the upper atmosphere. One year on HD 131399 A b equals 550 Earth. For 100-140 years, all three suns are visible all day, so the planet is fully lit. Double sunrises and sunsets are also observed. When a single sun sets, two rise.
Opening
It was “discovered” using the Very Large Telescope spherical lens at the European Southern Observatory, located in the Atacama Desert in Chile. The first exoplanet discovered by the SPHERE system (Spectro-Polarimetric High-contrast Exoplanet REsearch).
Notes
- ↑ 1 2 Wagner K., Apai D., Kasper M. et al. Direct imaging discovery of a Jovian exoplanet within a triple-star system (Eng.) // Science: journal. - 2016. - Vol. 353 , no. 6300 . - P. 673–678 . - DOI : 10.1126 / science.aaf9671 . - . - arXiv : 1607.02525 .
- ↑ Evidence that the Directly-Imaged Planet HD 131399 Ab is a Background Star
- ↑ A Surprising Planet with Three Suns . ESO (July 7, 2016). Archived June 29, 2018.