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Seyfert Galaxies

Published online by Cambridge University Press:  14 August 2015

B. M. Lewis
B. M. Lewis*
Affiliation:
Nuffield Radio Astronomy Laboratories, Jodrell Bank, Cheshire, Great Britain

Abstract

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The four Seyfert galaxies with systemic velocities of less than 2000 km s−1 have been observed at 21 cm with the Jodrell Bank 250-ft telescope and a 5 MHz overall bandwidth setting of the 256 channel auto-correlation spectrometer. Relatively strong signals of 0.5 f.u. are observed in NGC 1068 and 4151, while less well-determined signals of ∼ 0.25 f.u. and covering a wide velocity range are seen in both NGC 3227 and 4051. Measures of the systemic velocity, velocity width and Hi mass are obtained, the Hi mass/L being normal for galaxies of their Hubble type.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 44: External Galaxies and Quasi-Stellar Objects , 1972 , pp. 267 - 268
Copyright
Copyright © Reidel 1972 

References

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