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Electron Population Aging Models for Wide-Angle Tails
Andrew Young, Lawrence Rudnick, Debora M. Katz-Stone +1
Color-color diagrams have been useful in studying the spectral shapes in radio galaxies. At the workshop we presented color-color diagrams for two wide-angle tails, 1231+674 and 14…
Coaxial Jets and Sheaths in Wide-Angle-Tail Radio Galaxies
D. M. Katz-Stone, L. Rudnick, C. Butenhoff +1
We add 20, 6 and 3.6 cm wavelength VLA observations of two WATs, 1231+674 and 1433+553, to existing VLA data at 6 and 20 cm, in order to study the variations of spectral index as a…
Spectroscopy of Outlying H II Regions in Spiral Galaxies: Abundances and Radial Gradients
L. van Zee, J. J. Salzer, M. P. Haynes +2
We present the results of low dispersion optical spectroscopy of 186 H II regions spanning a range of radius in 13 spiral galaxies. Abundances for several elements (oxygen, nitroge…