Excess barium in a K dwarf-white dwarf binary system.

Jeffries, Robin D; Smalley, Barry

Abstract

We present spectroscopic evidence for an excess of the s-process element barium, in the rapidly rotating, K-dwarf component of the wide binary system 2REJ0357+283. The secondary star is a hot white dwarf (WD) and our result argues for a model where the K-star has accreted mass and angular momentum from the asymptotic giant branch progenitor of the WD and lends strong support to the wind-accretion hypothesis for barium giant formation. If our tentative detection of excess carbon can be confirmed, then we propose that 2REJ0357+283 is very similar to the two dwarf carbon star plus hot WD binary systems that have been found recently.

Citation

Jeffries, R. D., & Smalley, B. (1996). Excess barium in a K dwarf-white dwarf binary system. Astronomy and Astrophysics, 315, L19-L22

• Journal Article Type: Letter
• Acceptance Date: Sep 17, 1996
• Publication Date: 1996-11
• Deposit Date: Feb 14, 2024
• Journal: Astronomy and Astrophysics
• Print ISSN: 2329-1273
• Publisher: Hans Publishers
• Peer Reviewed: Peer Reviewed
• Volume: 315
• Pages: L19-L22
• Keywords: STARS: ABUNDANCES; STARS: CARBON; BINARIES: GENERAL; STARS: ROTATION; STARS: WHITE DWARFS; ULTRAVIOLET: STARS
• Publisher URL: https://ui.adsabs.harvard.edu/abs/1996A%26A...315L..19J/abstract