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Optical and Radio Surface Photometry of NGC 891

Published online by Cambridge University Press:  19 July 2016

R.J. Allen ,
S. Sukumar ,
F.X. Hu  and
P. C. Van Der Kruit
R.J. Allen
Affiliation:
1Astronomy Department, University of Illinois, Urbana, USA 2National Center for Supercomputing Applications, University of Illinois, Champaign, USA
S. Sukumar
Affiliation:
1Astronomy Department, University of Illinois, Urbana, USA
F.X. Hu
Affiliation:
3Kapteyn Astronomical Institute, University of Groningen, The Netherlands 4Purple Mountain Observatory, Nanjing, Peoples Republic of China
P. C. Van Der Kruit
Affiliation:
3Kapteyn Astronomical Institute, University of Groningen, The Netherlands

Abstract

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A general correlation between the radio and optical continuum surface brightness has been found in the edge-on galaxy NGC 891. This suggests that the relativistic electrons are produced/accelerated in the vicinity of evolved stars or stellar remnants which have a spatial distribution similar to old disk stars. In this picture, the magnetic field required for the synchrotron emission is carried up from the disk to high Z through instabilities and star-forming activity in the plane.

Type
5. The Polarization, Magnetic Field and Velocity Structure of External Spiral Galaxies
Information
Symposium - International Astronomical Union , Volume 140: Galactic and Intergalactic Magnetic Fields , 1990 , pp. 223 - 224
Copyright
Copyright © Kluwer 1990 

References

Allen, R.J. (1975) ‘Radio Observations of Spiral Structures in Galaxies”, in Weliachew, L. (ed.), La Dynamique des Galaxies Spirales, CNRS, Paris, pp. 157–197.Google Scholar
Van der Kruit, P.C. (1977) ‘The radio continuum emission of M51’, Astron. Astrophys. 59, 359–366.Google Scholar
Van der Kruit, P.C., Allen, R.J., and Rots, A.H. (1977) ‘Radio continuum emission from the HII complexes and the nonthermal disc of NGC 6946’, Astron. Astrophys. 55, 421–433.Google Scholar