Online material
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Fig. 4a
GTC-OSIRIS spectra of OB-type stars in IC 1613. The spectra have been rebinned to 3 pixels and corrected by each star’s radial velocity, except for 71 708, for which we used IC 1613’s systemic velocity −234 km s-1 (Lu et al. 1993). The evolution of HeII4541/HeI4471 is clearly seen. |
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Fig. 4b
continued. |
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Fig. 6
Best fit FASTWIND model (red) to the sample stars (black). The chart shows the principal diagnostic spectral lines, as in Fig. 5. Stellar identification numbers are provided on the right-hand side of the plot. Axes are only provided for the bottom target for clarity’s sake; the same axes are used for the remaining stars. |
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Appendix A: Finding charts for the sample stars
Finding charts for the newly identified OB stars are provided in this section. The images were taken with the Wide Field Camera (WFC) at the 2.5 m Isaac Newton Telescope (INT); for more details see GHV09. All the identification charts show a field of 2′ × 2′, observed with broad Harris V-band filter.
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Fig. A.1
Stars 60269 (B0.5 I), 60782 (O9.5 III), 61331 (O9.7 II), 64066 (O3 III((f))) and 65426 (O6 III). |
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Fig. A.2
Star 36611 (O7 III-V). |
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Fig. A.3
Stars 67684 (O8.5 I), 69476 (O6.5 III) and 71708 (late-O III+neb). |
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Fig. A.4
Star 75661 (O8 III). |
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Fig. A.5
Star 60882 (B0.5 I-III). |
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Fig. A.6
Star 27381 (B1-1.5 I). |
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Fig. A.7
Star 35071 (B2.5 III). |
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© ESO, 2013