Abundance analyses of the new R Coronae Borealis stars ASAS-RCB-8 and ASAS-RCB-10

B. P. Hema; Gajendra Pandey; Devika Kamath; N. Kameswara Rao; David Lambert; Vincent M. Woolf

doi:10.1088/1538-3873/aa7f25

Abundance analyses of the new R Coronae Borealis stars ASAS-RCB-8 and ASAS-RCB-10

B. P. Hema, Gajendra Pandey, Devika Kamath, N. Kameswara Rao, David Lambert, Vincent M. Woolf

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

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.

Original language	English
Article number	104202
Pages (from-to)	1-8
Number of pages	8
Journal	Publications of the Astronomical Society of the Pacific
Volume	129
Issue number	980
DOIs	https://doi.org/10.1088/1538-3873/aa7f25
Publication status	Published - 1 Oct 2017

Keywords

stars: abundances
stars: chemically peculiar
stars: distances

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10.1088/1538-3873/aa7f25

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abstract = "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.",

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T1 - Abundance analyses of the new R Coronae Borealis stars ASAS-RCB-8 and ASAS-RCB-10

AU - Hema, B. P.

AU - Pandey, Gajendra

AU - Kamath, Devika

AU - Rao, N. Kameswara

AU - Lambert, David

AU - Woolf, Vincent M.

PY - 2017/10/1

Y1 - 2017/10/1

N2 - 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.

AB - 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.

KW - stars: abundances

KW - stars: chemically peculiar

KW - stars: distances

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Abundance analyses of the new R Coronae Borealis stars ASAS-RCB-8 and ASAS-RCB-10

Abstract

Keywords

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