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- W2081424151 abstract "We present optical, near-infrared (NIR) images and spectra of the compact, dusty and complex HII region N88A in the SMC. The data were obtained mainly in the visible with the Boller & Chivens (B&C) spectrograph at the ESO 1.5 m telescope and recently with the infrared spectrometer and array camera (ISAAC) at the VLT, around 2 μm. The NIR observations identified a region emitting in H2, both in and around the two major components of N88. Using long-slit spectra obtained in the 3600–10 100 Å wavelength range we have re-determined the key physical parameters of electron temperature and densities. The spectral type of the complex exciting source of N88A has been classified as an O6-O8 V, using He and H lines in the visible and NIR, with the HeI 1.7 μm/2.11 μm line ratio in the K band spectrum, suggesting that N88A is effectively ionized by a source of type <O7 V. However, from reddening correction and the temperature determined by photoionization model calculations, the ionizing source should also contain a very early type O star. A comparison with a recent photometric study shows that the V magnitude of the exciting source of N88A has previously been overestimated. The chemical abundances of He, O, N, Ne, S, and Ar, from emission-line intensities, are also derived. Abundancies are consistent with the average abundances for SMC HII regions." @default.
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- W2081424151 date "2003-09-01" @default.
- W2081424151 modified "2023-10-14" @default.
- W2081424151 title "The physical properties of the compact star forming region N88A and its neighbourhood in the SMC" @default.
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- W2081424151 doi "https://doi.org/10.1051/0004-6361:20030974" @default.
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