Gliese 832c

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Exoplanet
Gliese 832c

Size comparison between Gliese 832c (left, artist's impression) and the earth

Size comparison between Gliese 832c (left, artist's impression) and the earth
Constellation crane
Position
equinox : J2000.0
Right ascension 21h 33m 33.98s
declination −49 ° 00 ′ 32.4 ″
Orbit data
Central star 832
Major semi-axis 0.163 ± 0.006 AU
eccentricity 0.18 ± 0.13
Period of circulation 35.68 ± 0.03 d
Further data
Minimum dimensions 5.40 ± 0.95 M ⊕
distance 4.954 ± 0.025 pc
history
discovery Robert A. Wittenmyer et al.
Date of discovery 2014

Gliese 832c is an exoplanet that the approximately 16 light-years from the sun distant red dwarf Gliese 832 in the constellation Crane orbits. It was discovered in 2014 by a team led by the Australian astronomer Robert A. Wittenmeyer from the University of New South Wales using the radial velocity method. The planet is one of two planets orbiting Gliese 832, next to the Jupiter-like planet Gliese 832b, which was discovered in 2008 and orbits further out. It is located in the habitable zone of its central star.

properties

Gliese 832c has a minimum mass of around 5.4 earth masses and is classified as super earth . The planet orbits its central star in almost 36 days on a slightly eccentric orbit, which partially runs along the inner boundary of the habitable zone of Gliese 832. Despite the much greater proximity of the orbit to the star compared to the orbit of the earth in the solar system , it receives roughly the same radiation energy, since Gliese 832 is a faint red dwarf. On Gliese 832c, temperatures similar to the Earth could prevail, but they are likely to be subject to large seasonal fluctuations. If there is a dense atmosphere, as is expected for super-earths, Gliese 832c could possibly be too hot and significantly less life-friendly and more likely to represent a “super- Venus ”.

Gliese 832c is listed in the Habitable Exoplanets Catalog of the Planetary Hability Laboratory ( PHL ) of the University of Puerto Rico at Arecibo with an Earth Similarity Index (ESI) of 0.81.

Web links

Commons : Gliese 832c  - Collection of images, videos and audio files

Individual evidence

  1. ^ A b van Leeuwen, F .: Validation of the new Hipparcos reduction . arxiv : 0708.1752 .
  2. ↑ a b c d e NASA Exoplanet Archive: Gliese 832. Retrieved May 6, 2015 .
  3. ↑ a b c d Wittenmyer, RA et al .: GJ 832c: A super-earth in the habitable zone . arxiv : 1406.5587 .
  4. ↑ a b c astronews.com from June 30, 2014: Habitable super-earth in the neighborhood? Retrieved May 6, 2015 .
  5. ↑ a b c Spectrum of June 27, 2014: Gliese 832 c discovered Inhabitable or not? Retrieved May 6, 2015 .
  6. ^ A b University of Puerto Rico at Arecibo: A Nearby Super-Earth with the Right Temperature but Extreme Seasons. Retrieved May 6, 2015 .
  7. ^ University of Puerto Rico at Arecibo: Habitable Exoplanets Catalog. Retrieved May 7, 2015 .