The discovery of optical emission knots in the inner jet of Centaurus A

Details The discovery of optical emission knots in the inner jet of Centaurus A The discovery of optical emission knots in the inner jet of Centaurus A

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...273..154b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 273, Oct. 1, 1983, p. 154-166.

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29

Emission Spectra, Light Emission, Plasma Jets, Radio Galaxies, Continuous Radiation, Line Spectra, Shock Waves, Spectrum Analysis

Scientific paper

The authors have discovered three regions of intense optical emission in the inner ≡2 kpc of the Cen A jet. Two of the regions coincide with X-ray and radio knots and emit strong optical continuum radiation with superposed emission lines. The third region is situated between the other two and coincident with a low surface brightness inter-knot zone in the radio and X-ray maps. Spectra were obtained for each of the regions in the range 3700 - 7500 Å. The observed line emission is not representative of normal H II regions and is probably produced by shock heating or photoionization by a power-law continuum. The optical continuum could be due to synchrotron radiation. The line emission is attributed to dense clumps immersed in the flow. Possible origins of the clumps and a large-scale shock in the jet are discussed.

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