Discovery of an accretion shock cone in 22 Vulpeculae

Astronomy and Astrophysics – Astronomy

Scientific paper

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Dwarf Stars, Eclipsing Binary Stars, Hot Stars, Shock Waves, Stellar Mass Accretion, Supergiant Stars, Absorption Spectra, Iue, Magnesium, Spaceborne Astronomy

Scientific paper

A previous report that 22 Vul is a zeta Aurigae-type eclipsing binary is
supported by the discovery of evidence for an accretion shock cone in 22
Vul similar to those found in zeta Aurigae and 32 Cygni. Such systems
consist of a cool supergiant star primary and a hot dwarf secondary (G3
Ib-II and B9 in the case of 22 Vul) and undergo atmospheric eclipses.

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