Английская Википедия:HD 7449
Шаблон:Short description Шаблон:Starbox begin Шаблон:Starbox observe Шаблон:Starbox character Шаблон:Starbox astrometry Шаблон:Starbox orbit Шаблон:Starbox detail Шаблон:Starbox catalog Шаблон:Starbox reference Шаблон:Starbox end
HD 7449 is a binary star system about Шаблон:Val way. The primary star, HD 7449 A, is a main-sequence star belonging to the spectral class F9.5. It is younger than the Sun. The primary star is slightly depleted of heavy elements, having 80% of solar abundance.[1]
Companion
The stellar companion HD 7449 B, belonging to spectral class M4.5, was discovered in 2015.[2] A survey in 2017 has failed to find additional stars with masses above 0.35Шаблон:Solar mass in the system.[3]
The most recent parameters for HD 7449 B as of 2022 come from a combination of data from radial velocity, astrometry, and imaging, showing that it is about Шаблон:Jupiter mass (Шаблон:Solar mass), and orbiting with a semi-major axis of about 34.7 AU and an orbital period of about 175 years.[4]
Planetary system
In 2011 one super-Jupiter-mass planet, Шаблон:Ill on a very eccentric orbit around HD 7449 A was discovered utilising the radial velocity method.[1] A second, long-term radial velocity trend is present, and a second planet or brown dwarf has been proposed as the cause of this trend.[1][5] However, in 2015 a low-mass stellar companion (HD 7449 B) was found, which is likely the cause of the long-term trend. The large eccentricity of the inner planet is likely caused by this stellar companion.[6] In 2022, the inclination and true mass of HD 7449 Ab were measured via astrometry.[4]
Шаблон:OrbitboxPlanet begin Шаблон:OrbitboxPlanet Шаблон:Orbitbox end
References
- ↑ 1,0 1,1 1,2 Ошибка цитирования Неверный тег
<ref>; для сносокDumusque2011не указан текст - ↑ Open Exoplanet Catalogue an open source database of all discovered extrasolar planets HD 7449
- ↑ Шаблон:Citation
- ↑ 4,0 4,1 Ошибка цитирования Неверный тег
<ref>; для сносокFeng2022не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокWittenmyer2019не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокRodigas2015не указан текст
- Английская Википедия
- F-type main-sequence stars
- M-type main-sequence stars
- Binary stars
- Planetary systems with one confirmed planet
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- Henry Draper Catalogue objects
- Hipparcos objects
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