Close Binaries and the Abundance Discrepancy Problem in Planetary Nebulae

Galaxies

R. Wesson¹  H.M. J. Boffin²  D. Jones³  R.L. M. Corradi³  J. García-Rojas³ 

[1] Department of Physics and Astronomy, University College London, Gower St, London WC1E 6BT, UK;European Southern Observatory, Karl-Schwarzschild-Str. 2, 85738 Garching bei München, Germany;Instituto de Astrofísica de Canarias, E-38205 La Laguna, Tenerife, Spain;

关键词: planetary nebulae;    binarity;    abundances;    stellar evolution;   

DOI  :  10.3390/galaxies6040110

来源: DOAJ

【 摘 要 】

Motivated by the recent establishment of a connection between central star binarity and extreme abundance discrepancies in planetary nebulae, we have carried out a spectroscopic survey targeting planetary nebula with binary central stars and previously unmeasured recombination line abundances. We have discovered seven new extreme abundance discrepancies, confirming that binarity is key to understanding the abundance discrepancy problem. Analysis of all 15 objects with a binary central star and a measured abundance discrepancy suggests a cut-off period of about 1.15 days, below which extreme abundance discrepancies are found.

【 授权许可】

Unknown