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Table 3

Carbon, nitrogen, and oxygen isotopic ratios for AGB carbon stars.

Star 12C/13Ca 14N/15Nb 16O/17Oc 16O/18Oc

N-type
AQ Sgr 52 1230 860 ± 150(4) 763 ± 280(8)
BL Ori 57 3700 625 ± 235(3) 1094 ± 600(7)
R Lep 62 1730 ± 700(6)
RT Cap 59 650 ± 250(5) 735 ± 220(6)
RV Cyg 74 610 ± 190(6) 606 ± 300(6)
S Sct 45 784 ± 176(3) 727 ± 114(4)
ST Cam 61 1250 925 ± 230(6) 1290 ± 380(4)
TU Gem 59 1562 ± 470(5)
TW Oph 65 830 ± 400(5) 980 ± 370(5)
TX Psc 42 1040 1200 ± 410(6) 660 ± 370(7)
U Cam 97 2000 1095 ± 300(4) 500 ± 200(3)
U Hya 32 1800 ± 230(2) 1220 ± 100(5)
UU Aur 50 1100 930 ± 380(4) 875 ± 230(5)
UX Dra 26 820 ± 400(5) 560 ± 40(5)
V460 Cyg 61 4600 870 ± 360(6) 562 ± 300(5)
V Aql 82 1800 1110 ± 800(4) 700 ± 0(2)
VY UMa 44 820 ± 145(5) 725 ± 450(7)
W CMa 53 1060 ± 250(4) 830 ± 0(3)
W Ori 79 4280 1200 ± 500(6) 850 ± 180(4)
Y Hya 82 850 ± 270(6) 1100 ± 70(3)
Y Tau 58 880 1250 ± 300(6) 1224 ± 800(6)
X Cnc 52 3330 1045 ± 165(7) 1600 ± 150(3)
Z Psc 55 1320 695 ± 140(6) 732 ± 280(3)
SC-type
CY Cyg 6 620 ± 50(3) 770 ± 500(2)
FU Mon 27 535 ± 100(7) 400 ± 10(6)
GP Ori 35 660 550 ± 190(6) 682 ± 140(6)
RZ Peg 12 862 ± 380(5) 890 ± 400(5)
WZ Cas 5 640 504 ± 130(6) 1250 ± 350(7)
J-type
R Scl 19 300 500
RY Dra 3.6 385 ± 250(4) >200
T Lyr 3.2 450 ± 60(4)
VX And 13 900 770 650 ± 170(3)
Y Cvn 3 3200 270 ± 55(4) >300

Notes.

(a)

Carbon isotope ratios from Lambert et al. (1986), Abia et al. (2002), and Hedrosa et al. (2013).

(b)

Nitrogen isotope ratios from Hedrosa et al. (2013).

(c)

The number in parenthesis indicates the number of 12C17,18O lines used, respectively. The dispersion found among the different lines is indicated when more than two lines are used.

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