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- W3100012252 abstract "In this paper we present for the first time, the study of low resolution $H$- and $K$- band spectra of 7 DY,Per type and suspects stars as well as DY,Persei itself. We also observed $H$- and $K$- band spectra of 3 R Coronae Borealis (RCB) stars, 1 hydrogen-deficient carbon (HdC) star and 14 cool carbon stars including normal giants as comparisons. High $^{12}$C/$^{13}$C and low $^{16}$O/$^{18}$O ratios are characteristic features of majority RCBs and HdCs. We have estimated $^{16}$O/$^{18}$O ratios of the programme stars from the relative strengths of the $^{12}$C$^{16}$O and $^{12}$C$^{18}$O molecular bands observed in $K$- band. Our preliminary analysis suggest that a quartet of the DY,Per suspects along with DY,Persei itself seems to show isotopic ratio strength consistent with the ones of RCB/HdC stars whereas two of them do not show significant $^{13}$C and $^{18}$O in their atmospheres. Our analysis provides further indications that DY,Per type stars could be related to RCB/HdC class of stars." @default.
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- W3100012252 date "2018-02-21" @default.
- W3100012252 modified "2023-10-02" @default.
- W3100012252 title "Are DY Persei Stars Cooler Cousins of R Coronae Borealis Stars?" @default.
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- W3100012252 doi "https://doi.org/10.3847/1538-4357/aaaae4" @default.
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