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CHAPTER V
Identification of the Nucleus in the Spiral Galaxy NGC 4631


ABSTRACT

We present broad band infrared photometry of the edge-on spiral galaxy NGC 4631. The position of peak infrared intensity is found to lie not on the most optically prominent part of the galaxy, but in the nearby area of strongest dust absorption. This position is discussed in relation to the rotation curve measured by G. and A. de Vaucouleurs, and the radio continuum maps of Pooley. We conclude that the location of the infrared peak is probably the true position of the nucleus.

Key words: galaxies - infrared photometry

Running title: Identification of the Nucleus in NGC 4631