Английская Википедия:Gliese 849
Шаблон:Short description Шаблон:Starbox begin Шаблон:Starbox observe Шаблон:Starbox character Шаблон:Starbox astrometry Шаблон:Starbox detail Шаблон:Starbox catalog Шаблон:Starbox reference |- style="background-color: #A0B0FF;" colspan="3" | Planet |- bgcolor="#FFFAFA" | Gliese 849b || data Шаблон:Starbox end
Gliese 849, or GJ 849, is a small, solitary star in the equatorial constellation of Aquarius. It has a reddish hue and is invisible to the naked eye with an apparent visual magnitude of 10.41.[1] The distance to this star is Шаблон:Convert based on parallax,[2] but it is drifting closer to the Sun with a radial velocity of −15.3 km/s.[1] It has a pair of confirmed gas giant companions.[3]
The stellar classification of GJ 849 is M3.5V,[4] which means this is a small red dwarf star generating energy through hydrogen fusion at its core region. Various studies have found super-solar abundances in the spectra,[3] indicating that the elemental abundances of higher mass elements is significantly higher than in the Sun. The star has about half the mass and size of the Sun,[5] and is spinning slowly with a rotation period of approximately 39 days.[6] The estimated age of the star is more than three billion years.[5] It is radiating a mere 2.9%[7] of the luminosity of the Sun from its photosphere at an effective temperature of 3,490 K.[7]
Planetary system
In late 2006, a long-period Jupiter-like exoplanet was reported to be orbiting the red dwarf in a period just over 5 years in length. There was also a linear trend in the radial velocities which suggested another longer period companion.[5] The trend in the radial velocities was confirmed in 2013.[8] An orbit for the second exoplanet was finally determined in 2015. The first planet discovered, Gliese 849 b, was the first planet discovered orbiting a red dwarf with a semi-major axis greater than 0.21 AU.[3]
Шаблон:OrbitboxPlanet begin Шаблон:OrbitboxPlanet Шаблон:OrbitboxPlanet Шаблон:Orbitbox end
See also
- List of star systems within 25–30 light-years
- Gliese 317
- Gliese 649
- Gliese 581
- List of extrasolar planets
References
External links
- ↑ 1,0 1,1 Ошибка цитирования Неверный тег
<ref>; для сносокAnderson_Francis_2012не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокGaiaDR3не указан текст - ↑ 3,0 3,1 3,2 Ошибка цитирования Неверный тег
<ref>; для сносокFeng2015не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокSchweitzer_et_al_2019не указан текст - ↑ 5,0 5,1 5,2 Ошибка цитирования Неверный тег
<ref>; для сносокButler2006не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокmnras452_3_2745не указан текст - ↑ 7,0 7,1 Ошибка цитирования Неверный тег
<ref>; для сносокPineda2021не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокBonfils2013не указан текст
- Английская Википедия
- M-type main-sequence stars
- Planetary systems with two confirmed planets
- Aquarius (constellation)
- Durchmusterung objects
- Gliese and GJ objects
- Hipparcos objects
- 2MASS objects
- Страницы, где используется шаблон "Навигационная таблица/Телепорт"
- Страницы с телепортом
- Википедия
- Статья из Википедии
- Статья из Английской Википедии
- Страницы с ошибками в примечаниях
