Abundance Analyses of the New R Coronae Borealis Stars ASAS-RCB-8 and ASAS-RCB-10

作者：Hema B P^*; Pandey Gajendra; Kamath Devika; Rao N Kameswara; Lambert David; Woolf Vincent M

来源：Publications of the Astronomical Society of the Pacific, 2017, 129(980): 104202.

DOI：10.1088/1538-3873/aa7f25

• stars: abundances
• stars: chemically peculiar
• stars: distances

Abundance analyses of the two newly discovered R Coronae Borealis (RCB) stars ASAS-RCB-8 and ASAS-RCB-10 were conducted using high-resolution optical spectra and model atmospheres. Their chemical compositions place the pair among the majority class of RCBs. ASAS-RCB-10 is one of the most N-poor majority RCBs with an above average O abundance. Relative to ASAS-RCB-10, ASAS-RCB-8 is H poor by 1.6 dex, O-poor by 0.7 dex but N-rich by 0.8 dex suggesting a higher contamination by CNO-cycled material.

• 出版日期2017-10-1