Английская Википедия:HD 87643

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

Файл:ESO- Reflection Nebula around HD 87643-phot-28a-09-fullres.jpg
Reflection nebula around HD 87643

HD 87643 is a B[e] class binary star embedded in a reflection nebula.

The system is described as having "one of the most extreme infrared excesses for this object class". It harbours a large amount of both hot and cold dust, and is surrounded by a debris disk with radius 2.5-3 AU[1] and an extended reflection nebula. and is important for astronomers in their study of stellar formation.[2]

Файл:V640CarLightCurve.png
A visual band light curve for V640 Carinae, plotted from AAVSO data

All the properties of HD 87643 are highly uncertain. Its distance has been estimated anywhere from one to six kpc. The General Catalogue of Variable Stars classifies it as an Orion variable, a pre-main sequence star, but other authors consider it to be a supergiant B[e] star. It has been confirmed to be a binary star system with the two stars separated by about 52 AU, but the nature of the companion is unknown.[2]

References

Шаблон:Reflist

External links

Шаблон:Stars of Carina

  1. Ошибка цитирования Неверный тег <ref>; для сносок Laws2019 не указан текст
  2. 2,0 2,1 Шаблон:Cite journal