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Jet-Cloud Interactions in Compact Steep Spectrum Radio Sources

Capetti, A.; Koekemoer, A. M.; Morganti, R. +8 more

We have obtained HST/STIS long slit spectroscopy of the aligned emission line nebulae in three compact steep spectrum (CSS) radio sources - 3C67, 3C277.1, and 3C303.1. We find systematic offsets (~300-500kms) of the emission line velocities on one or both sides of the radio sources. We also see evidence for broad lines (FWHM~500kms) and complex em…

HST/STIS Spectroscopy of CSS sources: Kinematics and Ionisation of the Aligned Nebulae

Capetti, A.; Koekemoer, A. M.; Morganti, R. +9 more

We have obtained long slit spectra of 3C67 and 3C277.1 with the HST/STIS spectrograph. We present our preliminary results on the diagnostic emission line ratios along the radio source axes in 3C67 and 3C277.1.

Optical and UV Spectral Diagnostics for GPS and CSS Sources

Dopita, Michael A.

In this paper I examine the use of optical and UV spectral diagnostic ratios to distinguish between gas which is locally shock-excited by the interaction with a jet and that which is photoionised by the central engine. In many cases key UV lines remain unobserved except in the case of high redshift radio galaxies. However, in one case, the nearby …