14 Andromedae b

Extrasolar planet in Andromeda constellation 14 Andromedae b / Spe 14 And b rv.pdf Radial velocity changes over time of 14 Andromedae caused by the orbit of 14 Andromedae b. Sato et al. Okayama PlanetSearch Program July 2, 2008 Doppler Spectroscopy yes "spe" from latin "spes" meaning hope Spe astron 0.775 AU km on 0.0094 186.76 0.11 0.12 d 2452853.0 2.1 86.08 2.76 2.95 m/s 14 Andromedae 3.559 0.114 0.122 ≥ Jupiter mass 14 Andromedae b (abbreviated 14 And b), formally named Spe ' s p iː, is a candidate exoplanet approximately 248 light-years away in the constellation of Andromeda. The 186-day period planet orbits about 83% the Earth-Sun distance from the giant star 14 Andromedae. It has a minimum mass of 3.559 times the mass of Jupiter. The planet orbits with an eccentricity of 0.0094, which means the orbital distance over the course of its revolution varies by only 0.02 AU. Nomenclature In July 2014 the International Astronomical Union launched NameExoWorlds, a process for giving proper names to certain exoplanets and their host stars.NameExoWorlds: An IAU Worldwide Contest to Name Exoplanets and their Host Stars https://web.archive.org/web/20170904221813/https://www.iau.org/news/pressreleases/detail/iau1404/ 2017-09-04 . IAU.org. 9 July 2014 The process involved public nomination and voting for the new names.http://nameexoworlds.iau.org/process NameExoWorlds The Process 2015-09-05 2015-08-15 https://web.archive.org/web/20150815025117/http://www.nameexoworlds.iau.org/process dead In December 2015, the IAU announced the name Spe for this planet.Final Results of NameExoWorlds Public Vote Released https://web.archive.org/web/20171202072549/http://www.iau.org/news/pressreleases/detail/iau1514/ 2017-12-02 , International Astronomical Union, 15 December 2015. The winning name was based on that submitted by the Thunder Bay Centre of the Royal Astronomical Society of CanadaThunder Bay Amateur Astronomers Name a Planet); namely 'Spes', Latin for 'hope'. (Spes was also the Roman goddess of hope.) The IAU substituted the ablative form 'Spe', which means 'where there is hope', to match that given to the host star at the same time.http://nameexoworlds.iau.org/names NameExoWorlds The Approved Names 2015-12-17 2018-02-01 https://web.archive.org/web/20180201043609/http://nameexoworlds.iau.org/names dead Discovery The preprint announcing 14 Andromedae b was submitted to the arXiv electronic repository on July 2, 2008, by Bun'ei Sato and collaborators, who discovered it using the Doppler Spectroscopy method, during the Okayama Planet Search radial velocity survey of G and K giants at Okayama Astrophysical Observatory. Planet challenged A 2023 study of planets around evolved stars, while presenting updated parameters for this planet, found that the radial velocity variations are correlated with stellar activity signals, casting doubt on the planet's existence. Based on this, a 2024 study listed it as one of several doubtful planets around giant stars (along with the other named planets 41 Lyncis b and 42 Draconis b). See also 81 Ceti b 6 Lyncis b References Planetary Companions to Evolved Intermediate-Mass Stars: 14 Andromedae, 81 Ceti, 6 Lyncis, and HD167042 https://academic.oup.com/pasj/article/60/6/1317/1391840 Sato Bun'ei Toyota Eri Omiya Masashi Izumiura Hideyuki Kambe Eiji Masuda Seiji Takeda Yoichi Itoh Yoichi Ando Hiroyasu Yoshida Michitoshi Kokubo Eiichiro Ida Shigeru 1 Publications of the Astronomical Society of Japan 60 6 1317–1326 2008 0807.0268 2008PASJ...60.1317S 10.1093/pasj/60.6.1317 67841762 Teng Huan-Yu Sato Bun'ei etal August 2023 Revisiting planetary systems in the Okayama Planet Search Program: A new long-period planet, RV astrometry joint analysis, and a multiplicity-metallicity trend around evolved stars Publications of the Astronomical Society of Japan 75 6 1030–1071 10.1093/pasj/psad056 2308.05343 2023PASJ...75.1030T Spaeth Dane Reffert Sabine etal September 2024 Non-radial oscillations mimicking a brown dwarf orbiting the cluster giant NGC 4349 No. 127 Astronomy & Astrophysics 689 A91 10.1051/0004-6361/202450163 free 2407.21583 2024A&A...689A..91S External links http://media4.obspm.fr/exoplanets/base/etoile.php?nom=14+And 14 Andromedae Exoplanets 2008-08-06 https://web.archive.org/web/20091125004955/http://media4.obspm.fr/exoplanets/base/etoile.php?nom=14+And 2009-11-25 dead https://exoplanet.eu/catalog/14_and_b--489/ Notes for Planet 14 And b Jean Schneider 2011 Extrasolar Planets Encyclopaedia 30 September 2011 Category:Andromeda (constellation) Category:Giant planets Category:Exoplanets discovered in 2008 Category:Exoplanets detected by radial velocity Category:Exoplanets with proper names Category:Exoplanets orbiting K-type stars Category:Exoplanets orbiting giant stars