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Very Large Excesses of 18 O in Hydrogen-deficient Carbon and R Coronae Borealis Stars: Evidence for White Dwarf Mergers

Clayton, Geoffrey C; Geballe, Thomas R; Herwig, Falk; Fryer, Christopher; Asplund, Martin


We have found that at least seven hydrogen-deficient carbon (HdC) and R Coronae Borealis (RGB) stars, have 16O/ 18O ratios close to and in some cases less than unity, values that are orders of magnitude lower than measured in other stars (the solar value

CollectionsANU Research Publications
Date published: 2007
Type: Journal article
Source: Astrophysical Journal, The
DOI: 10.1086/518307


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