Astronomy & Astrophysics

All Figures

$\begin{figure} \par\includegraphics[width = 8.8cm]{2543f01} \end{figure}$ Figure 1: A composite six-color image of the LMC H II region N 214C and the OB association LH 110 in which it lies. The image, taken with the ESO NTT/SuSI2, results from the co-addition of narrow and broad-band filters R and H $\alpha$ (red), V and [O III] (green), and B and H $\beta$ (blue). The field size is 364'' $\times$ 348'' corresponding to 91 $\times$ 87 pc. North is up and east to the left. The brightest star, situated toward the middle of the nebula, is the Sk $-71^{\circ }51$ cluster. The striking compact H II blob lies $\sim$ 60'' ( $\sim$ 15 pc) north of Sk $-71^{\circ }51$ . See Fig. 7 for identifications of the compact nebulae lying north-west of N 214C.
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In the text

$\begin{figure} \par\includegraphics[width=8.8cm]{2543f02}\end{figure}$ Figure 2: The H II region N 214C through the broad-band filter V obtained using ESO NTT equipped with SuSI2. North is up and east to the left. Field size: 206'' $\times$ 208'' ( $\sim$ 52 $\times$ 52 pc). The stars for which spectroscopy has been obtained are labelled, as well as some noteworthy stars of the sample indicated in Fig. 3. The subfield (21 $.\!\!^{\prime\prime}$ 8²) on which the deconvolution has been carried out is also shown.
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In the text

$\begin{figure} \par\includegraphics[width = 8.8cm,clip]{2543f03} \end{figure}$ Figure 3: Color-magnitude, V versus B - V, diagram for the 2341 stars observed toward LMC N 214C. Three isochrones are shown, 1 Myr with $A_{\rm V} = 0.5$ mag (red curve), 1 Gyr (dotted blue), and 10 Gyr (dashed-dotted green), computed for a metallicity of Z = 0.008 (Lejeune & Schaerer 2001) and a distance modulus of 18.6 mag. A number of masses between 2 and 80 $M_{\odot }$ are indicated for the 1 Myr isochrone. The arrow indicates the reddening shift for $A_{\rm V}$ = 1 mag. The numbers refer to the stellar identifications presented in Fig. 2.
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In the text

$\begin{figure} \par\includegraphics[width=6.7cm]{2543f04a}\hspace*{6mm} \includegraphics[width=6.7cm]{2543f04b} \end{figure}$ Figure 4: The deconvolution subfield around the hot star Sk $-71^{\circ }51$ in V (see Fig. 2). Left: single frame after subtraction of the nebular background, exposure time 60 s, seeing about 8.5 pixels (0 $.\!\!^{\prime\prime}$ 72). Right: the same field after deconvolution. The resulting FWHM of the sources is 3 pixels, or 0 $.\!\!^{\prime\prime}$ 25 on the sky. Field size 21 $.\!\!^{\prime\prime}$ 7² ( $\sim$ 5.4² pc). North is up and east to the left.
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In the text

$\begin{figure} \par\includegraphics[width =8.8cm]{2543f05} \end{figure}$ Figure 5: An H $\alpha$ image with a deep intensity cut displaying the northern and southern-eastern ridges. Field size the same as in Fig. 2.
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In the text

$\begin{figure} \par\includegraphics[width = 8.8cm]{2543f06} \end{figure}$ Figure 6: A composite color image of the nebular blob lying $\sim$ 60'' (15 pc) north of the Sk $-71^{\circ }51$ cluster. Based on individual images taken through narrow-band filters H $\alpha$ (red), [O III] (green) and H $\beta$ (blue). Size 513 $\times$ 363 pixels, 43'' $\times$ 31'' on the sky, corresponding to $\sim$ 11 $\times$ 8 pc. North is up and east to the left. The brightest star north of the emission peak is # 1145 and the one south of the peak is # 1104. The faint star situated toward the center of the blob is # 1132. The two relatively bright stars in the eastern and western lobes are # 1136 and # 1121 respectively (see also Table 4).
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In the text

$\begin{figure} \par\includegraphics[width = 8cm]{2543f07} \end{figure}$ Figure 7: H $\alpha$ image of the anonymous compact nebulae, labelled N 214H-1, 2, and 3 and the diffuse N 214H-4, all lying north-west of N 214C. Field size $\sim$ 88'' $\times$ 88'' ( $\sim$ 22 $\times$ 22 pc). North is up and east to the left. See Table 4 for more information on the labelled stars.
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In the text

$\begin{figure} \par\includegraphics[width = 6.7cm]{2543f08a}\hspace*{6mm} \includegraphics[width = 6.7cm]{2543f08b} \end{figure}$ Figure 8: Line ratio maps of the H II region N 214C based on narrow-band filter images, after subtraction of point sources with DAOPHOT/allstar. The white circles around the stars are processing artefacts. Left: the extinction H $\alpha$ /H $\beta$ map. Right: the excitation [O III] /H $\beta$ map. Field size as in Fig. 2. North is up and east to the left.
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In the text

$\begin{figure} \par\includegraphics[width=8.8cm]{2543f09}\end{figure}$ Figure 9: Spectra of O type stars in the LMC H II region N 214C.
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In the text

$\begin{figure} \par\includegraphics[width=8.8cm]{2543f10}\end{figure}$ Figure 10: Spectra of B type stars in the LMC H II region N 214C.
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In the text

$\begin{figure} \par\includegraphics[width =8.8cm]{2543f05} \end{figure}$	Figure 5: An H $\alpha$ image with a deep intensity cut displaying the northern and southern-eastern ridges. Field size the same as in Fig. 2.
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$\begin{figure} \par\includegraphics[width = 8cm]{2543f07} \end{figure}$	Figure 7: H $\alpha$ image of the anonymous compact nebulae, labelled N 214H-1, 2, and 3 and the diffuse N 214H-4, all lying north-west of N 214C. Field size $\sim$ 88'' $\times$ 88'' ( $\sim$ 22 $\times$ 22 pc). North is up and east to the left. See Table 4 for more information on the labelled stars.
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$\begin{figure} \par\includegraphics[width = 6.7cm]{2543f08a}\hspace*{6mm} \includegraphics[width = 6.7cm]{2543f08b} \end{figure}$	Figure 8: Line ratio maps of the H II region N 214C based on narrow-band filter images, after subtraction of point sources with `DAOPHOT/allstar`. The white circles around the stars are processing artefacts. Left: the extinction H $\alpha$ /H $\beta$ map. Right: the excitation [O III] /H $\beta$ map. Field size as in Fig. 2. North is up and east to the left.
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$\begin{figure} \par\includegraphics[width=8.8cm]{2543f09}\end{figure}$	Figure 9: Spectra of O type stars in the LMC H II region N 214C.
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$\begin{figure} \par\includegraphics[width=8.8cm]{2543f10}\end{figure}$	Figure 10: Spectra of B type stars in the LMC H II region N 214C.
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