Gliese 832 b

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Gliese 832 b
Discovery [1]
Discovered by Bailey et al.
Discovery site Anglo-Australian Observatory
Discovery dateSeptember 1, 2008
Doppler spectroscopy
Orbital characteristics [2]
3.7±0.1  AU
Eccentricity 0.05±0.03
3853+51
−47  d
10.55+0.14
−0.13  yr
Inclination 51°±3° or 134°±3°
61°+17°
−13° or 265°+12°
−15°
2456696+454
−338  JD
207°+22°
−31°
Star Gliese 832
Physical characteristics [2]
Mass 0.99+0.09
−0.08  MJ

    Gliese 832 b (Gl 832 b or GJ 832 b) is a gas giant exoplanet about the mass of Jupiter, located 16.2 light-years from the Sun in the constellation of Grus, orbiting the red dwarf star Gliese 832. [3]

    Contents

    Orbit

    The planet takes 10.5 years to revolve around its star at an orbital distance of 3.7 AU; [2] at the time of discovery, this was the longest-period Jupiter-like planet known orbiting a red dwarf. [1] The brightness of the faint parent star at that distance corresponds to the brightness of the Sun from 80 AU (or 100 times brighter than a full Moon as seen from Earth).

    Discovery

    The planet was discovered at the Anglo-Australian Observatory on September 1, 2008. It would induce an astrometric perturbation on its star of at least 0.95 milliarcseconds and is thus a good candidate for being detected by astrometric observations. Despite its relatively large angular distance, direct imaging is problematic due to the star–planet contrast. [1] Gliese 832 b was confirmed and its orbital solution refined by subsequent studies in 2011, [4] 2014, [5] and 2022. [6] The planet was detected astrometrically by two different 2023 studies, determining its inclination and revealing a true mass close to the mass of Jupiter. [7] [2]

    See also

    References

    1. 1 2 3 Bailey, Jeremy; et al. (2008). "A Jupiter-like Planet Orbiting the Nearby M Dwarf GJ832". The Astrophysical Journal. 690 (1): 743–747. arXiv: 0809.0172 . Bibcode:2009ApJ...690..743B. doi:10.1088/0004-637X/690/1/743. S2CID   17172233.
    2. 1 2 3 4 Philipot, F.; Lagrange, A.-M.; et al. (October 2023). "A multi-technique approach to identifying and/or constraining radial-velocity substellar companions". Astronomy & Astrophysics . 678: A107. arXiv: 2308.05417 . Bibcode:2023A&A...678A.107P. doi:10.1051/0004-6361/202346612.
    3. ↑ Wall, Mike (June 25, 2014). "Nearby Alien Planet May Be Capable of Supporting Life". Space.com. Archived from the original on July 12, 2018. Retrieved July 1, 2014.
    4. ↑ Bonfils, Xavier; Delfosse, Xavier; Udry, Stéphane; Forveille, Thierry; Mayor, Michel; Perrier, Christian; Bouchy, François; Gillon, Michaël; Lovis, Christophe; Pepe, Francesco; Queloz, Didier; Santos, Nuno C.; Ségransan, Damien; Bertaux, Jean-Loup (2011). "The HARPS search for southern extra-solar planets XXXI. The M-dwarf sample". Astronomy and Astrophysics. 549: A109. arXiv: 1111.5019 . Bibcode:2013A&A...549A.109B. doi:10.1051/0004-6361/201014704. S2CID   119288366.
    5. ↑ Wittenmyer, R.A.; Tuomi, M.; Butler, R.P.; Jones, H. R. A.; Anglada-Escude, G.; Horner, J.; Tinney, C.G.; Marshall, J.P.; Carter, B.D.; et al. (2014). "GJ 832c: A super-earth in the habitable zone". The Astrophysical Journal. 1406 (2): 5587. arXiv: 1406.5587 . Bibcode:2014ApJ...791..114W. doi:10.1088/0004-637X/791/2/114. S2CID   12157837.
    6. ↑ Gorrini, P.; Astudillo-Defru, N.; et al. (August 2022). "Detailed stellar activity analysis and modelling of GJ 832: Reassessment of the putative habitable zone planet GJ 832c". Astronomy & Astrophysics . 664: A64. arXiv: 2206.07552 . Bibcode:2022A&A...664A..64G. doi:10.1051/0004-6361/202243063. S2CID   249674385.
    7. ↑ Xiao, Guang-Yao; Liu, Yu-Juan; et al. (May 2023). "The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements". Research in Astronomy and Astrophysics . 23 (5): 055022. arXiv: 2303.12409 . Bibcode:2023RAA....23e5022X. doi:10.1088/1674-4527/accb7e. S2CID   257663647.
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