Abstract
Most of our knowledge about spiral structure is based upon phenomena which are essentially linked to young Population I objects (i.e., 0—B associations, HII regions, dust lanes, molecular clouds, HI complexes, radio emission, etc.). According to dynamical theories of spiral structure, the phenomena mentioned above are just the high visibility products of a more subtle perturbation acting on the underlying Old Disk Population. The only wavelength domain where the disk component may dominate, and be therefore directly observable, is the NIR around 2µm. Following this line of thought, we have obtained maps in the H—band of the spiral galaxy NGC 6946, where we observe clear signs of spiral structure.
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© 1990 Kluwer Academic Publishers
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Baffa, C., Giovanardi, C., Hunt, L.K. (1990). Near Infrared Spiral Structure in NGC 6946. In: Fabbiano, G., Gallagher, J.S., Renzini, A. (eds) Windows on Galaxies. Astrophysics and Space Science Library, vol 160. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0543-6_47
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DOI: https://doi.org/10.1007/978-94-009-0543-6_47
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-6731-7
Online ISBN: 978-94-009-0543-6
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