Gliese 832 b
| Discovery[1] | |
|---|---|
| Discovered by | Baileyet al. |
| Discovery site | Anglo-Australian Observatory |
| Discovery date | September 1, 2008 |
| Doppler spectroscopy | |
| Orbital characteristics[2] | |
| 3.53+0.15 −0.16AU | |
| Eccentricity | 0.069+0.026 −0.027 |
| 3609+124 −121d 9.88+0.34 −0.33yr | |
| Inclination | 54.9°+6.6° −4.9°or125.1°+4.9° −6.6° |
| 41.0°+77.0° −23.0° | |
| 2457470+327 −294 | |
| 213.0°±33.0° | |
| Star | Gliese 832 |
| Physical characteristics[2] | |
| Mass | 0.8+0.12 −0.11MJ |
Gliese 832 b(Gl 832 borGJ 832 b) is agas giantexoplanetabout 80% the mass of Jupiter, located 16.2light-yearsfrom the Sun in theconstellationofGrus,orbiting thered dwarfstarGliese 832.[3]
Orbit
[edit]The planet takes 9.88 years to revolve around its star at an orbital distance of 3.5AU;[2]at the time of discovery, this was the longest-periodJupiter-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
[edit]The planet was discovered at theAnglo-Australian Observatoryon September 1, 2008. It would induce anastrometricperturbation on its star of at least 0.95milliarcsecondsand 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 parameters updated by subsequent studies in 2011,[4]2014,[5]and 2022.[6]In 2023, an astrometric detection of the planet was announced, determining its inclination and revealing atrue mass80% the mass of Jupiter.[2]
References
[edit]- ^abcBailey, 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.S2CID17172233.
- ^abcdXiao, Guang-Yao; Liu, Yu-Juan; et al. (March 2023). "The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements".Research in Astronomy and Astrophysics.arXiv:2303.12409.
- ^Wall, Mike (June 25, 2014)."Nearby Alien Planet May Be Capable of Supporting Life".Space.Archivedfrom the original on July 12, 2018.RetrievedJuly 1,2014.
- ^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.S2CID119288366.
- ^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.S2CID12157837.
- ^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.S2CID249674385.
External links
[edit]- "GJ 832".Exoplanets.Archived fromthe originalon 2009-11-25.Retrieved2008-10-11.
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