GJ 1132 b

Coordinates: Sky map 10h 14m 51.100s, −47° 09′ 12.00″
Source: Wikipedia, the free encyclopedia.
GJ 1132 b
Size comparison of GJ 1132 b with Earth.
Discovery[1]
Discovered byMEarth-South Array Team
Discovery siteChile
Discovery dateMay 10, 2015 (announced)[2] November 12, 2015 (confirmed)[3]
Transit
Orbital characteristics[4]
0.0153±0.0005 AU
Eccentricity<0.22
1.6289304(13) d[5]
Inclination86.58°±0.63°[6]
Semi-amplitude2.85±0.34 m/s
StarGJ 1132
Physical characteristics[4]
Mean radius
1.130±0.056 R🜨
Mass1.66±0.23 M🜨
Mean density
6.3±1.3 g/cm3
12.9±2.2 m/s2
13.6±1.0 km/s

GJ 1132 b (also known as Gliese 1132 b) is an exoplanet orbiting the red dwarf star GJ 1132 41 light-years (13 parsecs) from Earth,[1] in the constellation Vela. The planet is considered uninhabitable but cool enough to possess an atmosphere.[2] GJ 1132 b was discovered by the MEarth-South array in Chile.[7]

It has been called "one of the most important planets ever discovered beyond the Solar System": Due to its relative proximity to Earth, telescopes should be able to determine the composition of its atmosphere, the speed of its winds and the color of its sunsets.

transits. The planet's diameter is approximately 20% larger than that of the Earth[1] and its mass is estimated at 1.6 times that of Earth,[2] implying that it has an Earth-like rocky composition.[11] GJ 1132 b orbits its star every 1.6 days at a distance of 1.4 million miles (2.24 million kilometres).[7]

The planet receives 19 times more

tidally locked
due to its proximity to its star; however, under most circumstances where an atmosphere is thick, it would be able to transfer heat to the far side.

Atmosphere

In April 2017, a hydrogen-dominated atmosphere was claimed to have been detected around GJ 1132 b.[12][6] However, subsequent, more precise work ruled out the claim.[13] Instead, in 2021 detection of a hazy hydrogen atmosphere without helium but with the admixture methane and hydrogen cyanide (implying substantial underlying free nitrogen in the mix, at around 8.9% of the atmosphere) was claimed.[14] However, two subsequent studies found no evidence for molecular absorption in the HST WFC3 Spectrum of GJ 1132 b. Instead, the spectrum was found to be flat,[15][16] which is more consistent with our current understanding of photoevaporation.

Gallery

  • An artist's impression of the exoplanet GJ 1132 b.[17]
    An artist's impression of the exoplanet GJ 1132 b.[17]

See also

References

  1. ^
    S2CID 4385619
    .
  2. ^ a b c Chu, Jennifer (November 11, 2015). "New exoplanet in our neighborhood". MIT News. Retrieved 2015-11-12.
  3. ^ NASA Exoplanet Archive New ticker slide 1
  4. ^
    S2CID 119394477
    , A142.
  5. doi:10.3847/1538-4365/ac9da4. Vizier catalog entry
  6. ^
    S2CID 119049452
    .
  7. ^ a b "Astronomers Eager to Get a Whiff of Newfound Venus-like Planet". Harvard–Smithsonian Center for Astrophysics. November 11, 2015. Retrieved 2015-11-12.
  8. ^ Sample, Ian (11 November 2015). "Earth-like world could be 'most important planet found outside solar system'". The Guardian. Retrieved 2015-11-11.
  9. ^ Burgess, Matt. "Exoplanet GJ 1132b: the 'most important' ever found". Wired UK. Retrieved 2015-11-12.
  10. ^ "Getting Up Close and Personal with an Earth-Sized Exoplanet". The Kavli Foundation. November 11, 2015. Retrieved 2015-11-13.
  11. ^ a b Eva Botkin-Kowacki (2015-11-11). "Spotted: A rocky Earth-sized planet close by". The Christian Science Monitor.
  12. ^ "Atmosphere around super-Earth detected". Phys.Org. April 6, 2017. Retrieved April 6, 2017.
  13. S2CID 119061941
    .
  14. S2CID 232170188
    .
  15. S2CID 233025360
    .
  16. S2CID 235125875
    .
  17. ^ "Hubble Sees New Atmosphere Forming on a Rocky Exoplanet". esahubble.org. Retrieved 24 March 2021.
Retrieved from "https://en.wikipedia.org/w/index.php?title=GJ_1132_b&oldid=1188024675"