The hot R Coronae Borealis star DY Centauri is a binary

Abstract

The remarkable hot R Coronae Borealis star DY Cen is revealed to be the first and only binary system to be found among the R Coronae Borealis (RCB) stars and their likely relatives, including the Extreme Helium stars and the hydrogen-deficient carbon stars. Radial velocity determinations from 1982-2010 have shown DY Cen is a single-lined spectroscopic binary in an eccentric orbit with a period of 39.67 days. It is also one of the hottest and most H-rich member of the class of RCB stars. The system may have evolved from a common-envelope to its current form.

Published in The Astrophysical Journal Letters; one missing reference has been added in order to fit the published version ApJ, 760, L3

References in corpus (3)

• Stellar archaeology: the evolving spectrum of FG Sge
• A Radial Velocity Study of Composite-Spectra Hot Subdwarf Stars with the Hobby-Eberly Telescope
• High-resolution optical spectroscopy of DY Cen: diffuse interstellar bands in a proto-fullerene circumstellar environment?

Cited by in corpus (4)

• The ongoing pursuit of R Coronae Borealis stars: ASAS-3 survey strikes again
• SALT revisits DY Cen: a rapidly-evolving strontium-rich single helium star
• On the binary helium star DY Centauri: Chemical composition and evolutionary state
• The changing nebula around the hot R Coronae Borealis star DY Centauri