The physical properties of the compact star forming region N88A and its neighbourhood in the SMC. I. Excitation and abundances

Details The physical properties of the compact star forming region N88A and its neighbourhood in the SMC. I. Excitation and abundances The physical properties of the compact star forming region N88A and its neighbourhood in the SMC. I. Excitation and abundances

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003a%26a...407..905t&link_type=abstract

Astronomy and Astrophysics, v.407, p.905-912 (2003)

Astronomy and Astrophysics

Astrophysics

4

Galaxies: Magellanic Clouds, Ism: Individual Objects: N88A (Smc), Ism: Hii Regions, Ism: Abundances, Infrared: Ism, Stars: Early-Type

Scientific paper

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 mu m. 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 mu m/2.11 mu m line ratio in the K band spectrum, suggesting that N88A is effectively ionized by a source of type Based on observations obtained at the European Southern Observatories, La Silla and El Paranal, Chile.

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