Английская Википедия:HD 95109

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Шаблон:About 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 95109 (U Carinae) is a Classical Cepheid variable, a type of variable star, in the constellation Carina. Its apparent magnitude is 6.86.

Файл:UCarLightCurve.png
A near-infrared (J band) light curve for U Carinae, adpated from Laney and Stobie (1992)[1]

U Car is a δ Cepheid variable with a period of 38.7681 days. It was one of the earliest Cepheids to be discovered. It has also one of the longest periods, and hence is one of the most luminous in the class.[2] There are still only a few Cepheids with longer periods, including RS Puppis, SV Vulpeculae, and the unusual S Vulpeculae.[3]

The brightness variation in U Car is caused by fundamental mode pulsations. The radius and temperature both vary, with the radius changing by Шаблон:Solar radius during each cycle.[4] The temperature variation causes the spectral type to vary between F6 and G7.

References

Шаблон:Reflist

Шаблон:Stars of Carina

  1. Ошибка цитирования Неверный тег <ref>; для сносок Laney не указан текст
  2. Шаблон:Cite journal
  3. Ошибка цитирования Неверный тег <ref>; для сносок gcvs не указан текст
  4. Шаблон:Cite journal