Английская Википедия:Cygnus OB2-8A

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

Cygnus OB2 #8A is a double-lined spectroscopic binary located near the centre of the Cygnus OB2 association located 5,500 light years away.

Discovery

Until 1951 Cyg OB2 #8 had been known only as an anonymous catalogue entry in the Bonner Durchmusterung. Then it was identified as one of several highly luminous hot stars close together in Cygnus. Despite being commonly referred to as Schulte #8A, the number 8 was first published in an earlier paper.[1] Schulte identified the grouping as a massive stellar association and split star #8 into four components, including #8A.[2]

System

The Cygnus OB2 #8A system contains two massive luminous O class stars in a 21.9 day orbit. The primary is a Шаблон:Solar mass supergiant and the secondary is a Шаблон:Solar mass giant star.[3] The two stars are not thought to be exchanging mass and their luminosity classes match the main sequence turnoff in the Cyg OB2 association at around O6.[4] The nearby stars Cyg OB2 #8B, #8C, and #8D, originally thought to be a single star, are all massive and luminous class O stars.

References

Шаблон:Reflist

External links

Шаблон:Sky

Шаблон:Stars of Cygnus

  1. Шаблон:Cite journal
  2. Шаблон:Cite journal
  3. Шаблон:Cite journal
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