Astronomy:Kepler-1658
Kepler-1658 is a triple star system located in the constellation Cygnus.[1] Based on parallax measurements by the Gaia spacecraft,[2] it is located at a distance of 2,660 light-years (820 parsecs).
This is an hierarchical triple system whose primary is an F-type subgiant star with 1.45 times the Sun's mass and 3.26 times the Sun's radius.[3] The outer system, 50 astronomical units away from the primary, is an eclipsing binary whose components have an orbital period of 3.8 days: star B is probably a K-type dwarf with 0.8 times the Sun's mass, and star C a red dwarf with 0.19 times the mass of the Sun and 0.23 times the radius.[4]
Search for planets
In 2009, a hot Jupiter planet candidate (KOI-4.01, now known as Kepler-1658b) was identified around Kepler-1658 by the Kepler space telescope via the transit method. Initially ruled out as a false alarm, a 2019 study re-claimed its nature as a planet. This would be the first planet ever detected by Kepler.[5] Analysis of the Transiting Exoplanet Survey Satellite (TESS) data in 2022 showed that it is gradually spiraling into its star, with its orbit decaying.[6] However, in 2025 it was demonstrated that Kepler-1658b is a false positive planet.[4] In reality, all the data that supported the detection of a planet with physical orbital decay were caused by the eclipsing outer system, whose light travel time effect is responsible for the supposed orbital decay.[4]
References
- ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific 99 (617): 695. doi:10.1086/132034. Bibcode: 1987PASP...99..695R Constellation record for this object at VizieR.
- ↑ Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ Petigura, Erik A.; Rogers, James G.; Isaacson, Howard; Owen, James E.; Kraus, Adam L.; Winn, Joshua N.; MacDougall, Mason G.; Howard, Andrew W. et al. (April 2022). "The California-Kepler Survey. X. The Radius Gap as a Function of Stellar Mass, Metallicity, and Age" (in en). The Astronomical Journal 163 (4): 179. doi:10.3847/1538-3881/ac51e3. ISSN 0004-6256. Bibcode: 2022AJ....163..179P.
- ↑ 4.0 4.1 4.2 Winn, Joshua N.; Stefánsson, Guđmundur (2025-12-01). "Orbital Decay Candidates Reconsidered: WASP-4 b Is Not Decaying and Kepler-1658 b Is Not a Planet". The Planetary Science Journal 6 (12): 300. doi:10.3847/PSJ/ae21db. ISSN 2632-3338.
- ↑ Chontos, Ashley; Huber, Daniel; Latham, David W.; Bieryla, Allyson; Eylen, Vincent Van; Bedding, Timothy R.; Berger, Travis; Buchhave, Lars A. et al. (2019). "The Curious Case of KOI 4: Confirming Kepler ' s First Exoplanet Detection". The Astronomical Journal 157 (5): 192. doi:10.3847/1538-3881/ab0e8e. ISSN 1538-3881. Bibcode: 2019AJ....157..192C.
- ↑ Vissapragada, Shreyas; Chontos, Ashley; Greklek-McKeon, Michael; Knutson, Heather A.; Dai, Fei; González, Jorge Pérez; Grunblatt, Sam; Huber, Daniel et al. (2022). "The Possible Tidal Demise of Kepler's First Planetary System". The Astrophysical Journal Letters 941 (2): L31. doi:10.3847/2041-8213/aca47e. ISSN 2041-8205. Bibcode: 2022ApJ...941L..31V.
Cite error: <ref> tag with name "SIMBAD" defined in <references> is not used in prior text.
Cite error: <ref> tag with name "Zacharias2013" defined in <references> is not used in prior text.
Cite error: <ref> tag with name "Jönsson2020" defined in <references> is not used in prior text.
Cite error: <ref> tag with name "Su2022" defined in <references> is not used in prior text.
 |  |
