Английская Википедия:14 Herculis
Шаблон:Short description Шаблон:Starbox begin Шаблон:Starbox observe Шаблон:Starbox character Шаблон:Starbox astrometry Шаблон:Starbox detail Шаблон:Starbox catalog Шаблон:Starbox reference Шаблон:Starbox end
14 Herculis or 14 Her is the Flamsteed designation of a K-type main-sequence star Шаблон:Convert away in the constellation Hercules. It is also known as HD 145675. Because of its apparent magnitude, the star cannot be seen with the naked eye. As of 2021, 14 Herculis is known to host two exoplanets in orbit around the star.[1]
Stellar components
14 Herculis is an orange dwarf star of the spectral type K0V. The star has about 98 percent of the mass, 97 percent of the radius, and only 67 percent of the luminosity of the Sun. The star appears to be 2.7 times as enriched with elements heavier than hydrogen (based on its abundance of iron), in comparison to the Sun.[1] It may have been the most metal rich star known as of 2001.[2]
Planetary system
In 1998 a planet, 14 Herculis b was discovered orbiting 14 Herculis via radial velocity.[3][4] This was formally published in 2003.[5] The planet has an eccentric orbit with a period of 4.8 years.[6] In 2005, a possible second planet was proposed, designated 14 Herculis c.[7] The parameters of this planet were very uncertain, but an initial analysis suggested that it was in the 4:1 resonance with the inner planet, with an orbital period of almost 19 years at an orbital distance of 6.9 AU.[6] The existence of the planet 14 Herculis c was confirmed in 2021, along with a rough orbit determination.[8]
A 2021 study combining radial velocity and astrometry found that the planetary orbits are not coplanar, which may indicate a strong planet-planet scattering event in the past.[1] Subsequent astrometric studies have found differing results; a 2022 study found inclinations consistent with aligned orbits,[9] while a 2023 study again found misaligned orbits.[10] The latter study also found signs of a third candidate planet with a period of about 10 years, but this signal is most likely related to the star's magnetic activity cycle.[10]
Direct imaging of the outer planet 14 Herculis c with the James Webb Space Telescope is planned.[11]
Шаблон:OrbitboxPlanet begin Шаблон:OrbitboxPlanet Шаблон:OrbitboxPlanet Шаблон:Orbitbox end
See also
References
External links
Шаблон:14 Herculis Шаблон:Stars of Hercules Шаблон:Sky
- ↑ 1,0 1,1 1,2 Ошибка цитирования Неверный тег
<ref>; для сносокGagliuffi2021не указан текст - ↑ S. Feltzing and G. Gonzalez, "The nature of super-metal-rich stars* Detailed abundance analysis of 8 super-metal-rich star candidates", 2001
- ↑ Ошибка цитирования Неверный тег
<ref>; для сносокpress releaseне указан текст - ↑ Шаблон:Cite conference
- ↑ Ошибка цитирования Неверный тег
<ref>; для сносокButler2003не указан текст - ↑ 6,0 6,1 Ошибка цитирования Неверный тег
<ref>; для сносокwittenmyerне указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокGozdziewski2006не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокRosenthal2021не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокFeng2022не указан текст - ↑ 10,0 10,1 Ошибка цитирования Неверный тег
<ref>; для сносокBenedict2023не указан текст - ↑ Шаблон:Cite web
- Английская Википедия
- Flamsteed objects
- Hercules (constellation)
- Henry Draper Catalogue objects
- Hipparcos objects
- Gliese and GJ objects
- Durchmusterung objects
- K-type main-sequence stars
- Planetary systems with two confirmed planets
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