All Figures

$\begin{figure} \par\includegraphics[width=12cm,clip]{5052_f01.ps} \end{figure}$ Figure 1: Spectrum of WR 61 (solid line), together with the WNE grid model 09-14 ( $T_\ast$ = 63 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.7, dotted line). The IUE spectrum ( top panel) has been divided by the reddened model continuum (see Fig. 3), while the optical and the near-IR spectra were normalized by eye.
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In the text

$\begin{figure} \par\includegraphics[width=13.3cm,clip]{5052_f02.ps} \end{figure}$ Figure 2: Parameters of the Galactic WN stars (labels: WR-Numbers). Shown is the "transformed radius'' $R_{\rm t}$ (see text) versus the stellar temperature $T_\ast$ . Dark/red filled symbols refer to stars with detectable hydrogen, while light/green filled symbols denote hydrogen-free stars. The symbol shapes are coding for the spectral subtype (see inlet). In the lower, hatched part of the diagram the winds are very thick, and the parameter space is degenerate such that any stars located in this part can be arbitrarily shifted parallel to the grey lines.
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In the text

$\begin{figure} \par\includegraphics[width=14cm,clip]{5052_f03.ps} \end{figure}$ Figure 3: Spectral energy distribution (SED). The IUE observation (noisy line) and photometry in b, $\varv$ , J, H and K (blocks labelled with magnitude) is compared with the reddened flux (smooth line: model continuum; dotted line: model spectrum with lines) from the WNE grid model 09-14 ( $T_\ast = 63$ kK, $\log~ (R_{\rm t}/R_\odot) = 0.7$ ). Reddening parameters and $\log L$ are suitably adjusted. The adopted absolute magnitude of $M_\varv = -4.45$ mag for the WN5 subtype implies a distance modulus of $D\!M$ = 14.73 mag.
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In the text

$\begin{figure} \par\includegraphics[width=8.5cm,clip]{5052_f04.ps} \end{figure}$ Figure 4: Absolute visual magnitudes of Galactic WN stars with known distance. The dark (red) symbols refer to stars with detectable hydrogen, while symbols with light (green) filling stand for hydrogen-free stars. The thick lines indicate the relations which we adopted for stars of unknown distance.
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In the text

$\begin{figure} \par\includegraphics[width=8.6cm,clip]{5052_f05.ps} \end{figure}$ Figure 5: Galactic position of the analyzed WN stars. The meaning of the symbols is the same as in Fig. 2. Stars with distances known from cluster/association membership are represented by bigger symbols, while smaller symbols rely on our $M_\varv$ calibration of the WN subtypes. The sun ( $\odot$ ) and the Galactic Center ("GC'') are indicated.
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In the text

$\begin{figure} \par\includegraphics[width=8.4cm,clip]{5052_f06.ps} \end{figure}$ Figure 6: Empirical mass-loss rate versus luminosity for the Galactic WN stars. Dark (red) filled symbols refer to stars with detectable hydrogen (WNL), while light (green) filled symbols denote hydrogen-free stars (WNE). The thick straight lines correspond to the mass loss - luminosity relation proposed by Nugis & Lamers (2000) for hydrogen-free WN stars (upper line) and for a hydrogen mass fraction of 40% (lower line).
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In the text

$\begin{figure} \par\includegraphics[width=15.7cm,clip]{5052_f07.ps} \end{figure}$ Figure 7: Observed line profiles of WR 2 (solid line), compared to a model without rotation (dashed) and after convolution corresponding to $v_{\rm rot} \sin i = 1900$ km s^-1 (dotted).
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In the text

$\begin{figure} \par\includegraphics[width=11.5cm,clip]{5052_f08.ps} \end{figure}$ Figure 8: Hertzprung-Russell diagram of the Galactic WN stars. The bigger symbols refer to stars whose distances are known from cluster/association membership. The filling color reflects the surface composition (dark/red: with hydrogen; light/green: hydrogen-free). The symbol shapes are coding for the spectral subtype (see inlet). A little arrow indicates that this particular star might be actually hotter because of the parameter degeneracy discussed in Sect. 4.1.
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In the text

$\begin{figure} \par\includegraphics[width=8.5cm,clip]{5052_f09.ps} \end{figure}$ Figure 9: Hertzprung-Russell diagram with the analyzed WN stars, now omitting the close binaries. The symbols have the same meaning as in Fig. 8. The evolutionary tracks from Meynet & Maeder (2003) account for the effects of rotation (labels: initial mass). Thick lines refer to the different WR phases (see inlet).
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In the text

$\begin{figure} \par\includegraphics[width=8.5cm,clip]{5052_f10.ps} \end{figure}$ Figure 10: Hertzprung-Russell diagram with the analyzed WN stars, now omitting the close binaries. The symbols have the same meaning as in Fig. 8. This set of evolutionary tracks from Meynet & Maeder (2003) is calculated for zero rotation (labels: initial mass). Thick lines refer to the different WR phases (see inlet).
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In the text

$\begin{figure} \par\includegraphics[width=17.3cm,clip]{5052_f11.ps} \end{figure}$ Figure 11: Comparison of the Galactic WN stars with synthetic populations. Top-left panel: HRD of the analyzed Galactic WN stars (see Fig. 8 for the meaning of the symbols). Close binaries are omitted. Other panels: synthetic WN population, based on the Geneva tracks (Meynet & Maeder 2003). The filling color reflects the surface composition (dark/red: with hydrogen; light/green: almost hydrogen-free). The synthetic populations are for different assumptions as indicated in the plots. Top-right panel: evolution with rotation, Salpeter IMF ( $\beta$ = 1.35); bottom-left panel: evolution without rotation, Salpeter IMF ( $\beta$ = 1.35); bottom-right panel: evolution without rotation and "steep'' IMF ( $\beta = 2.00$ ).
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr001.ps} \end{figure}$ Figure 12: Model: WNE 14-18, $T_\ast$ = 112 kK, $\log~ (R_{\rm t}/R_\odot) = 0.3$ .
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr002.ps} \end{figure}$ Figure 13: Model: WNE 16-16, $T_\ast$ = 141 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.5.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr003.ps} \end{figure}$ Figure 14: Individual Model: WNL 12-09, $T_\ast$ = 89 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.2 but $\varv _\infty = 2700$ km s^-1.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr006.ps} \end{figure}$ Figure 15: Model: WNE 12-18, $T_\ast$ = 89 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.3.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr007.ps} \end{figure}$ Figure 16: Model: WNE 14-18, $T_\ast$ = 112 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.3.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr010.ps} \end{figure}$ Figure 17: Model: WNL 09-09, $T_\ast$ = 63 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.2.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr012.ps} \end{figure}$ Figure 18: Model: WNL 06-11, $T_\ast$ = 45 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.0.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr016.ps} \end{figure}$ Figure 19: Model: WNL 06-12, $T_\ast$ = 45 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.9.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr018.ps} \end{figure}$ Figure 20: Model: WNE 14-18, $T_\ast$ = 112 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.3.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr020.ps} \end{figure}$ Figure 21: Model: WNE 09-12, $T_\ast$ = 63 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.9.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr022.ps} \end{figure}$ Figure 22: Individual Model: 06-08, $T_\ast$ = 45 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.3 with $\varv _\infty$ = 1800 km s^-1 and $X_{\rm H}$ = 0.40.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr024.ps} \end{figure}$ Figure 23: Individual Model: 07-08, $T_\ast$ = 50 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.35 with $\varv _\infty$ = 2000 km s^-1 and $X_{\rm H}$ = 0.44.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr025.ps} \end{figure}$ Figure 24: Individual Model: 07-06, $T_\ast$ = 50 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.5 with $\varv _\infty$ = 1800 km s^-1 and $X_{\rm H}$ = 0.44.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr028.ps} \end{figure}$ Figure 25: Model: WNL 07-09, $T_\ast$ = 50 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.2.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr034.ps} \end{figure}$ Figure 26: Model: WNE 09-13, $T_\ast$ = 63 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.8.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr035.ps} \end{figure}$ Figure 27: Model: WNL 08-12, $T_\ast$ = 56 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.9.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr036.ps} \end{figure}$ Figure 28: Model: WNE 12-19, $T_\ast$ = 89 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.2.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr037.ps} \end{figure}$ Figure 29: Model: WNE 13-17, $T_\ast$ = 100 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.4.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr040.ps} \end{figure}$ Figure 30: Model: WNL 06-14, $T_\ast$ = 45 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.7.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr044.ps} \end{figure}$ Figure 31: Model: WNE 11-13, $T_\ast$ = 79 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.8.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr046.ps} \end{figure}$ Figure 32: Individual Model: WNE 14-13 $T_\ast$ = 112 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.8 but $\varv _\infty$ = 2450 km s^-1.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr049.ps} \end{figure}$ Figure 33: Model: WNL 08-11, $T_\ast$ = 56 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.0.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr051.ps} \end{figure}$ Figure 34: Model: WNE 10-12, $T_\ast$ = 71 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.9.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr054.ps} \end{figure}$ Figure 35: Model: WNE 09-12, $T_\ast$ = 63 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.9.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr055.ps} \end{figure}$ Figure 36: Model: WNE 08-13, $T_\ast$ = 56 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.8.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr061.ps} \end{figure}$ Figure 37: Model: WNE 09-14, $T_\ast$ = 63 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.7.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr062.ps} \end{figure}$ Figure 38: Model: WNE 10-17, $T_\ast$ = 71 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.4.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr063.ps} \end{figure}$ Figure 39: Model: WNE 06-10, $T_\ast$ = 45 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.1.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr066.ps} \end{figure}$ Figure 40: Model: WNL 06-12, $T_\ast$ = 45 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.9.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr067.ps} \end{figure}$ Figure 41: Model: WNE 08-13, $T_\ast$ = 56 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.8.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr071.ps} \end{figure}$ Figure 42: Model: WNE 08-12, $T_\ast$ = 56 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.9.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr074.ps} \end{figure}$ Figure 43: Model: WNE 08-14, $T_\ast$ = 56 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.7.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr075.ps} \end{figure}$ Figure 44: Model: WNE 09-15, $T_\ast$ = 63 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.6.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr078.ps} \end{figure}$ Figure 45: Model: WNL 07-11, $T_\ast$ = 50 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.0.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr082.ps} \end{figure}$ Figure 46: Model: WNL 08-14, $T_\ast$ = 56 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.7.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr084.ps} \end{figure}$ Figure 47: Model: WNE 07-12, $T_\ast$ = 50 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.9.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr085.ps} \end{figure}$ Figure 48: Individual Model: 07-10, $T_\ast$ = 50 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.1 with $\varv _\infty$ = 1000 km s^-1 and $X_{\rm H}$ = 0.40.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr087.ps} \end{figure}$ Figure 49: Model: WNL 06-08, $T_\ast$ = 45 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.3.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr089.ps} \end{figure}$ Figure 50: Model: WNL 05-07, $T_\ast$ = 40 kK, $\log (R_{\rm t}/R_\odot) = 1.4$ .
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr091.ps} \end{figure}$ Figure 51: Model: WNE 10-17, $T_\ast$ = 71 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.4.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr094.ps} \end{figure}$ Figure 52: Model: WNE 08-12, $T_\ast$ = 56 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.9.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr100.ps} \end{figure}$ Figure 53: Model: WNE 11-18, $T_\ast$ = 79 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.3.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr105.ps} \end{figure}$ Figure 54: Model: WNL 04-10, $T_\ast$ = 35 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.1.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr107.ps} \end{figure}$ Figure 55: Model: WNL 07-13, $T_\ast$ = 50 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.8.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr108.ps} \end{figure}$ Figure 56: Model: WNL 05-07, $T_\ast$ = 40 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.4.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr110.ps} \end{figure}$ Figure 57: Model: WNE 10-16, $T_\ast$ = 71 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.5.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr115.ps} \end{figure}$ Figure 58: Model: WNE 07-12, $T_\ast$ = 50 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.9.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr116.ps} \end{figure}$ Figure 59: Model: WNL 05-13, $T_\ast$ = 40 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.8.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr120.ps} \end{figure}$ Figure 60: Model: WNE 07-13, $T_\ast$ = 50 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.8.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr123.ps} \end{figure}$ Figure 61: Model: WNE 06-14, $T_\ast$ = 45 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.7.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr124.ps} \end{figure}$ Figure 62: Model: WNL 06-14, $T_\ast$ = 45 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.7.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr128.ps} \end{figure}$ Figure 63: Model: WNL 10-10, $T_\ast$ = 71 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.1.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr129.ps} \end{figure}$ Figure 64: Model: WNE 09-12, $T_\ast$ = 63 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.9.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr130.ps} \end{figure}$ Figure 65: Model: WNL 06-11, $T_\ast$ = 45 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.0.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr131.ps} \end{figure}$ Figure 66: Model: WNL 06-08, $T_\ast$ = 45 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.3.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr134.ps} \end{figure}$ Figure 67: Model: WNE 09-14, $T_\ast$ = 63 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.7.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr136.ps} \end{figure}$ Figure 68: Model: WNL 10-16, $T_\ast$ = 71 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.5.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr147.ps} \end{figure}$ Figure 69: Model: WNL 05-12, $T_\ast$ = 40 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.9.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr148.ps} \end{figure}$ Figure 70: Model: WNL 05-08, $T_\ast$ = 40 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.3.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr149.ps} \end{figure}$ Figure 71: Model: WNE 09-14, $T_\ast$ = 63 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.7.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr152.ps} \end{figure}$ Figure 72: Model: WNL 11-10, $T_\ast$ = 79 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.1.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr156.ps} \end{figure}$ Figure 73: Model: WNL 05-10, $T_\ast$ = 40 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.1.
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In the text

$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr158.ps} \end{figure}$ Figure 74: Model: WNL 06-09, $T_\ast$ = 45 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.2.
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In the text

$\begin{figure} \par\includegraphics[width=12cm,clip]{5052_f01.ps} \end{figure}$	Figure 1: Spectrum of WR 61 (solid line), together with the WNE grid model 09-14 ( $T_\ast$ = 63 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.7, dotted line). The IUE spectrum ( top panel) has been divided by the reddened model continuum (see Fig. 3), while the optical and the near-IR spectra were normalized by eye.
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$\begin{figure} \par\includegraphics[width=8.5cm,clip]{5052_f04.ps} \end{figure}$	Figure 4: Absolute visual magnitudes of Galactic WN stars with known distance. The dark (red) symbols refer to stars with detectable hydrogen, while symbols with light (green) filling stand for hydrogen-free stars. The thick lines indicate the relations which we adopted for stars of unknown distance.
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$\begin{figure} \par\includegraphics[width=8.6cm,clip]{5052_f05.ps} \end{figure}$	Figure 5: Galactic position of the analyzed WN stars. The meaning of the symbols is the same as in Fig. 2. Stars with distances known from cluster/association membership are represented by bigger symbols, while smaller symbols rely on our $M_\varv$ calibration of the WN subtypes. The sun ( $\odot$ ) and the Galactic Center ("GC'') are indicated.
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$\begin{figure} \par\includegraphics[width=15.7cm,clip]{5052_f07.ps} \end{figure}$	Figure 7: Observed line profiles of WR 2 (solid line), compared to a model without rotation (dashed) and after convolution corresponding to $v_{\rm rot} \sin i = 1900$ km s^-1 (dotted).
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$\begin{figure} \par\includegraphics[width=8.5cm,clip]{5052_f09.ps} \end{figure}$	Figure 9: Hertzprung-Russell diagram with the analyzed WN stars, now omitting the close binaries. The symbols have the same meaning as in Fig. 8. The evolutionary tracks from Meynet & Maeder (2003) account for the effects of rotation (labels: initial mass). Thick lines refer to the different WR phases (see inlet).
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$\begin{figure} \par\includegraphics[width=8.5cm,clip]{5052_f10.ps} \end{figure}$	Figure 10: Hertzprung-Russell diagram with the analyzed WN stars, now omitting the close binaries. The symbols have the same meaning as in Fig. 8. This set of evolutionary tracks from Meynet & Maeder (2003) is calculated for zero rotation (labels: initial mass). Thick lines refer to the different WR phases (see inlet).
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$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr001.ps} \end{figure}$	Figure 12: Model: WNE 14-18, $T_\ast$ = 112 kK, $\log~ (R_{\rm t}/R_\odot) = 0.3$ .
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$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr002.ps} \end{figure}$	Figure 13: Model: WNE 16-16, $T_\ast$ = 141 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.5.
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$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr003.ps} \end{figure}$	Figure 14: Individual Model: WNL 12-09, $T_\ast$ = 89 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.2 but $\varv _\infty = 2700$ km s^-1.
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$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr006.ps} \end{figure}$	Figure 15: Model: WNE 12-18, $T_\ast$ = 89 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.3.
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$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr007.ps} \end{figure}$	Figure 16: Model: WNE 14-18, $T_\ast$ = 112 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.3.
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$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr010.ps} \end{figure}$	Figure 17: Model: WNL 09-09, $T_\ast$ = 63 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.2.
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$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr012.ps} \end{figure}$	Figure 18: Model: WNL 06-11, $T_\ast$ = 45 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.0.
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$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr016.ps} \end{figure}$	Figure 19: Model: WNL 06-12, $T_\ast$ = 45 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.9.
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$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr018.ps} \end{figure}$	Figure 20: Model: WNE 14-18, $T_\ast$ = 112 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.3.
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$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr020.ps} \end{figure}$	Figure 21: Model: WNE 09-12, $T_\ast$ = 63 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.9.
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$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr022.ps} \end{figure}$	Figure 22: Individual Model: 06-08, $T_\ast$ = 45 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.3 with $\varv _\infty$ = 1800 km s^-1 and $X_{\rm H}$ = 0.40.
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$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr024.ps} \end{figure}$	Figure 23: Individual Model: 07-08, $T_\ast$ = 50 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.35 with $\varv _\infty$ = 2000 km s^-1 and $X_{\rm H}$ = 0.44.
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$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr025.ps} \end{figure}$	Figure 24: Individual Model: 07-06, $T_\ast$ = 50 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.5 with $\varv _\infty$ = 1800 km s^-1 and $X_{\rm H}$ = 0.44.
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$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr028.ps} \end{figure}$	Figure 25: Model: WNL 07-09, $T_\ast$ = 50 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.2.
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$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr034.ps} \end{figure}$	Figure 26: Model: WNE 09-13, $T_\ast$ = 63 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.8.
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$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr035.ps} \end{figure}$	Figure 27: Model: WNL 08-12, $T_\ast$ = 56 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.9.
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$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr036.ps} \end{figure}$	Figure 28: Model: WNE 12-19, $T_\ast$ = 89 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.2.
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$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr037.ps} \end{figure}$	Figure 29: Model: WNE 13-17, $T_\ast$ = 100 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.4.
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$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr040.ps} \end{figure}$	Figure 30: Model: WNL 06-14, $T_\ast$ = 45 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.7.
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$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr044.ps} \end{figure}$	Figure 31: Model: WNE 11-13, $T_\ast$ = 79 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.8.
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$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr046.ps} \end{figure}$	Figure 32: Individual Model: WNE 14-13 $T_\ast$ = 112 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.8 but $\varv _\infty$ = 2450 km s^-1.
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$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr049.ps} \end{figure}$	Figure 33: Model: WNL 08-11, $T_\ast$ = 56 kK, $\log~ (R_{\rm t}/R_\odot)$ = 1.0.
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$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr051.ps} \end{figure}$	Figure 34: Model: WNE 10-12, $T_\ast$ = 71 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.9.
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$\begin{figure} \par\includegraphics[width=16.5cm,clip]{finalfits.dir/wr054.ps} \end{figure}$	Figure 35: Model: WNE 09-12, $T_\ast$ = 63 kK, $\log~ (R_{\rm t}/R_\odot)$ = 0.9.
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