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User:Kepler-1229b/Gliese 581 f

Coordinates: Sky map 15h 19m 27s, −07° 43′ 19″
From Wikipedia, the free encyclopedia

Gliese 581 f or Gl 581 f is a nonexistent exoplanet in the Gliese 581 system, located 20 light years (about 120 trillion miles) from Earth. It was the fifth planet claimed in the system and the sixth in order from the star. Its discovery was announced September 29, 2010.

Overview

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The planet was detected using radial velocity measurements combining the data from the HIRES instrument of the Keck 1 telescope and the HARPS instrument of ESO's 3.6m telescope at La Silla Observatory.[1]

The planet had a minimum mass of 7.0 Earth masses, suggesting that it may be either a large terrestrial planet (super earth) or a gaseous planet similar to Neptune. It orbits at a distance from its star of 0.758 AU, slightly more than Venus's distance from our Sun, but it is likely to be far too cold at its surface for liquid water.

Existence

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The existence of Gliese 581 f is controversial. Follow-up studies incorporating updated data from HARPS have not confirmed its existence,[2][3][4] and it appears the radial velocity variations at this period may instead be associated with the stellar activity cycle of Gliese 581 itself rather than any orbiting planet.[5]

References

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  1. ^ Vogt, Steven S. (2010-09-29). "The Lick-Carnegie Exoplanet Survey: A 3.1M⊕Planet in the Habitable Zone of the Nearby M3V Star Gliese 581". The Astrophysical Journal. 723: 954–965. arXiv:1009.5733. doi:10.1088/0004-637X/723/1/954. S2CID 3163906. {{cite journal}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
  2. ^ T. Forveille, X. Bonfils, X.Delfosse, R. Alonso, S. Udry, F. Bouchy, M. Gillon, C. Lovis, V. Neves, M. Mayor, F. Pepe, D. Queloz, N.C. Santos, D. Segransan, J.M. Almenara, H. Deeg, M. Rabus (2011). "The HARPS search for southern extra-solar planets XXXII. Only 4 planets in the Gl 581 system". arXiv:1109.2505 [astro-ph.EP].{{cite arXiv}}: CS1 maint: multiple names: authors list (link)
  3. ^ Baluev, Roman V. (2013). "The impact of red noise in radial velocity planet searches: only three planets orbiting GJ 581?". Monthly Notices of the Royal Astronomical Society. 429 (3): 2052–2068. arXiv:1209.3154. Bibcode:2013MNRAS.429.2052B. doi:10.1093/mnras/sts476.{{cite journal}}: CS1 maint: unflagged free DOI (link)
  4. ^ Tuomi, Mikko; Jenkins, James S. (2012). "Counting the number of planets around GJ 581. False positive rate of Bayesian signal detection methods". arXiv:1211.1280 [astro-ph.EP].{{cite arXiv}}: CS1 maint: multiple names: authors list (link)
  5. ^ Robertson, Paul; Endl, Michael; Cochran, William D.; Dodson-Robinson, Sarah E. (2013). "Hα Activity of Old M Dwarfs: Stellar Cycles and Mean Activity Levels for 93 Low-mass Stars in the Solar Neighborhood". The Astrophysical Journal. 764 (1): article id. 3. arXiv:1211.6091. Bibcode:2013ApJ...764....3R. doi:10.1088/0004-637X/764/1/3. S2CID 119178575.{{cite journal}}: CS1 maint: multiple names: authors list (link)
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Category:Gliese 581 Category:Exoplanet candidates Category:Libra (constellation) Category:Super-Earths Category:Terrestrial planets Category:Exoplanets discovered in 2010 Category:Exoplanets detected by radial velocity

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