Rotation of the Galaxy NGC 1316 associated with the Radio Source Fornax A

Abstract

THE peculiar So galaxy NGC 1316 lies between the two intense regions of radio emission that constitute the double radio source Fornax A (refs. 1 and 2). The radio centroid lies within the optical boundary of the galaxy. The physical association of the galaxy and the radio source has been put beyond doubt by Arp's discovery3 of extremely faint optical radiation emanating from curved pathways connecting each radio emitting region with the galaxy. In the immediate vicinity of NGC 1316 these pathways appear to form extensions to the major axis of the main elliptical body of the galaxy. This major axis makes an angle of about 45° with the line joining the radio maxima. Further out the pathways curve sharply and enter the radio emitting region.

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SEARLE, L. Rotation of the Galaxy NGC 1316 associated with the Radio Source Fornax A. Nature 207, 1282 (1965). https://doi.org/10.1038/2071282a0

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