Английская Википедия:CN Andromedae

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CN Andromedae (CN And) is an eclipsing binary star in the constellation Andromeda. Its maximum apparent visual magnitude is 9.62 and drops down to a minimum of 10.2 during the main eclipse. It is classified as a Beta Lyrae variable with a period roughly of 0.4628 days.[1]

System

The two stars in this system orbit very close to each other; their spectrum cannot be separated and as a whole they have a spectrum of an F5V star. They are in marginal contact,[2] and there is a mass flow from the primary star to the secondary at a rate of Шаблон:Nowrap.[3] The binary orbit is slowly decaying at rate 1.5*10−7 days/year. The third suspected component of the system is the red dwarf star with mass about 0.11 Шаблон:Solar mass, at 38Шаблон:± years orbit around binary. [4]

Variability

The light curve of CN Andromedae shows a primary eclipse, with its brightness dropping down to 10.21 magnitude, and a secondary one down to a magnitude of 9.9.[1] This phenomenon repeats with a cycle of approximately 11.1 hours, with period decreasing in time due to the mass transfer from one star to the other.[3]

References

Шаблон:Reflist

Шаблон:Stars of Andromeda

  1. 1,0 1,1 Ошибка цитирования Неверный тег <ref>; для сносок GCVS не указан текст
  2. Ошибка цитирования Неверный тег <ref>; для сносок Siwak2010 не указан текст
  3. 3,0 3,1 Ошибка цитирования Неверный тег <ref>; для сносок VanHamme2001 не указан текст
  4. Шаблон:Cite journal