NDLI: Radio observations of the S0 galaxy NGC 1218 (3C 78)

Content Provider	Raman Research Institute
Author	Saikia, D. J. Patnaik, A. R. Subrahmanya, C. R. Unger, S. W. Prabhu, T. P. Cornwell, T. J. Graham, D. A.
Copyright Year	1986
Abstract	The authors present VLA observations of the S0 galaxy NGC 1218 at λ20 and 6 cm with both the A and D arrays, at λ20 cm with the B array and at λ2 and 1.3 cm with the A array. They also present VLBI observations at λ6 cm with the European Network. The high-resolution radio observations reveal a flat-spectrum core and a one-sided jet whose width increases with distance from the nucleus. Assuming Faraday rotation to be small at λ6 cm, the magnetic field lines in the outer region of the jet are inclined to its axis and appear to diverge. The large-scale structure does not exhibit well-defined lobes but forms an extended halo with a largely circumferential magnetic field. The authors suggest that the observed one-sidedness of the jet could perhaps be due to a difference in the collimation of the jets on opposite sides of the nucleus, in addition to any possible effects of relativistic beaming.
Starting Page	545
File Format	PDF
ISSN	00358711
Alternate Webpage(s)	http://dspace.rri.res.in/handle/2289/4223
e-ISSN	13652966
Volume Number	219
Journal	Monthly Notices of Royal Astronomical Society (MNRAS)
Language	English
Publisher	Royal Astronomical Society
Publisher Date	1986-04-01
Access Restriction	Open
Rights Holder	The Royal Astronomical Society
Subject Keyword	Centimeter Waves High Resolution Radio Galaxies Galactic Structure Galactic Nuclei Astronomical Spectroscopy Astronomical Maps Spectral Resolution Astronomy and Astrophysics Visible Spectrum
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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