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Emission Lines: Sign of a New Energy Source?

Published online by Cambridge University Press:  14 August 2015

David S. De Young
David S. De Young*
Affiliation:
Kitt Peak National Observatory Tucson, Arizona

Extract

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In addition to the occurrence of emission line regions coexistent with extended radio sources which have been discussed at this Symposium, this phenomenon has been observed earlier in 3C277.3 (Miley et al. 1981) and in Centaurus A (Graham and Price 1981). This gas has been detected only in the Fanaroff and Riley “Class I” radio sources. Data concerning this class of object suggest that outflow from the nucleus is proceeding at transonic or subsonic speeds and this correlation has led to the suggestion (De Young 1981) that the origin of the emission line gas arises from entrainment of the interstellar medium into the ejected material.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 97: Extragalactic Radio Sources , 1982 , pp. 69 - 70
Copyright
Copyright © Reidel 1982 

References

Chevalier, R.A. 1974, Ap.J. , 188, 501.Google Scholar
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Graham, J.A., and Price, R.M. 1981, Ap.J. , 274, 813.Google Scholar
Miley, G.K., Heckman, T.M., Butcher, H.R. and van Breugel, W.J. 1981, Ap.J. Lett , 247, L5.Google Scholar
Miley, G.K., Norman, C., and Silk, J. 1981, in preparation.Google Scholar