Bibcode
Westmoquette, M. S.; Exter, K. M.; Smith, L. J.; Gallagher, J. S.
Referencia bibliográfica
Science Perspectives for 3D Spectroscopy, Eso Astrophysics Symposia European Southern Observatory, Volume . ISBN 978-3-540-73490-1. Springer-Verlag Berlin Heidelberg, 2007, p. 159
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2007
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Descripción
We present Gemini North GMOS/IFU observations of the roots of the NGC
1569 super-galactic wind. This forms part of a larger and on-going study
of the formation and collimation mechanisms of galactic winds. Four IFU
pointings cover the base of the outflows originating from the central
super-star clusters; we present a preliminary analysis for two
positions. The choice of single-slit mode and the R831 grating
(dispersion = 0.34 Å pix-) allowed us to cover the
spectral range 4740-6860Å through 500 object fibres. We observe
the nebular diagnostic lines of Hα, Hβ,
[OIII]λλ4959,5007, [NII]λλ6548,6583,
[SII]λλ6716, 6731. The data were reduced using the
standard Gemini pipeline included with IRAF, and corrected for
differential atmospheric refraction. We find emission lines clearly
composed of multiple components—in most cases a bright narrow
feature (intrinsic FWHM = 50 kms-1) superimposed on a fainter
broad component (FWHM ≤ 300 kms-1). We discuss the origin
of these components, in the context of the wind/interstellar medium
interaction.