Английская Википедия:HD 87643
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 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]
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
External links
- ↑ Ошибка цитирования Неверный тег
<ref>; для сносокLaws2019не указан текст - ↑ 2,0 2,1 Шаблон:Cite journal
- Английская Википедия
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- Binary stars
- Nebulae
- B-type supergiants
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- Carina (constellation)
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- 2MASS objects
- Durchmusterung objects
- Orion variables
- B(e) stars
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