NLTE spectroscopic analysis of the 3He anomaly in subluminous B-type stars

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Table 7.

Influence of He I 10830 Å on the sensitivity study for BD+48° 2721.

Mock spectrum	S/N	log n(⁴He)	log n(³He)
Model II++	84		−2.56 ± 0.05	0.16 ± 0.06
Model II++	100		−2.58 ± 0.02	0.17 ± 0.06
Model II++	200	−3.34 ± 0.02	−2.57 ± 0.01	0.17 ± 0.06
Model II++	300	−3.34 ± 0.01	−2.57 ± 0.01	0.17 ± 0.06
BD+48° 2721^a	84

Notes. Given uncertainties are the same as in Table 6. From Table 4: Model II++ (T_eff = 20 700 K, log(g) = 4.81, log n(⁴He) = −3.34, log n(³He) = −2.57, He I 6678 Å and He I 10830 Å included).

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