Английская Википедия:HD 107146

Материал из Онлайн справочника
Перейти к навигацииПерейти к поиску

Шаблон:Short description Шаблон:Starbox begin Шаблон:Starbox image Шаблон:Starbox observe Шаблон:Starbox character Шаблон:Starbox astrometry Шаблон:Starbox detail Шаблон:Starbox catalog Шаблон:Starbox reference Шаблон:Starbox end

HD 107146 is a star in the constellation Coma Berenices that is located about Шаблон:Convert from Earth.[1] The apparent magnitude of 7.028 makes this star too faint to be seen with the unaided eye.

The physical properties of this star are similar to the Sun, including the stellar classification G2V,[2] making this a solar analog.[3] The mass of this star is about 109% of the solar mass (Шаблон:Solar mass) and it has about 99% the radius of the Sun (Шаблон:Solar radius).[4] It is a young star with an age between 80 and 200 Myr.[1] The axis of rotation is estimated at Шаблон:Val degrees to the line of sight and it completes a rotation in a relatively brief 3.5 days.[4]

Circumstellar disc

In 2003, astronomers recognized the excess infrared[5] and submillimeter[1] emission indicative of circumstellar dust, the first time such a debris disk phenomenon was noted around a star of similar spectral types to the Sun, though having a much younger age. In 2004 the Hubble Space Telescope detected the presence of a spatially resolved disk surrounding the star.[6][7]

The star's circumstellar disc has dimensions of approximately Шаблон:Nowrap.[1] The dusty ring is cool, with a temperature of Шаблон:Convert, and has a dust mass of 0.250Шаблон:± Шаблон:Earth mass and nearly no gas.[8] Analysis of the debris disk in the far-infrared and submillimeter wavelengths, carried out using the Hubble Space Telescope, suggests the presence of small grains in the disk.[6] The disk appears to be slightly elongated to form an ellipse with its minor axis at a position angle of Шаблон:Nowrap; working under the assumption that the disk is in fact circular gives it an inclination of Шаблон:Nowrap from the plane of the sky.[6] An analysis published in 2009 suggests the possible presence of a planet at a separation of 45-75 AU,[3] in the wide gap centered at 75.4 AU[8] which may be carved by the planet, but no planet with mass exceeding 1-2 Шаблон:Jupiter mass was observed in the gap.[9] Шаблон:OrbitboxPlanet begin Шаблон:OrbitboxPlanet disk Шаблон:Orbitbox end

Gallery

References

Шаблон:Reflist

Шаблон:Stars of Coma Berenices

Партнерские ресурсы
Криптовалюты
Магазины
Хостинг
Разное

  1. ↑ 1,0 1,1 1,2 1,3 Ошибка цитирования Неверный тег <ref>; для сносок apj604_414 не указан текст
  2. ↑ Ошибка цитирования Неверный тег <ref>; для сносок SIMBAD не указан текст
  3. ↑ 3,0 3,1 Ошибка цитирования Неверный тег <ref>; для сносок apj690_L65 не указан текст
  4. ↑ 4,0 4,1 Ошибка цитирования Неверный тег <ref>; для сносок mnrasl413_1_L71 не указан текст
  5. ↑ Ошибка цитирования Неверный тег <ref>; для сносок apj600_435 не указан текст
  6. ↑ 6,0 6,1 6,2 Ошибка цитирования Неверный тег <ref>; для сносок apj617_L147 не указан текст
  7. ↑ Ошибка цитирования Неверный тег <ref>; для сносок hubblesite не указан текст
  8. ↑ 8,0 8,1 Ошибка цитирования Неверный тег <ref>; для сносок Marino2018 не указан текст
  9. ↑ Шаблон:Citation
  10. ↑ Шаблон:Cite web
Источник — http://wikihandbk.com/ruwiki/index.php?title=Английская_Википедия:HD_107146&oldid=15085858