The Origin of the Alignment Effect: Spectroscopy and Imaging of Radio Galaxies at Z~1.2

Details The Origin of the Alignment Effect: Spectroscopy and Imaging of Radio Galaxies at Z~1.2 The Origin of the Alignment Effect: Spectroscopy and Imaging of Radio Galaxies at Z~1.2

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995hst..prop.5966d&link_type=abstract

HST Proposal ID #5966

Physics

Hst Proposal Id #5966 Agn

Scientific paper

In Cycle 4, we have obtained deep images of 3C 324 (z=1.206)and 3C 368 (z=1.132), two prototypical examples of the radiogalaxy ``alignment effect,'' wherein the rest--frame UVcontinuum closely shares the orientation of the FR II radiosource. These remarkable images reveal complex structurescomprised of compact clumps and filaments distributed overtens of kpc. This unprecedentedly detailed view has raisedmany new questions concerning the origin(s) of this UV light.Polarimetric measurements suggest that much of this continuummay be scattered radiation from the central AGN, but we haveno working model to explain all of the observed properties.We propose to conduct a detailed dissection of 3C368,combining WFPC2 emission line and UV continuumimaging with FOS spectroscopy to determine the physicalconditions in the emission line gas and continuumsubstructures on kiloparsec scales. With such data, we canstrongly constrain proposed models for the aligned continuum.Our Cycle 4 imaging and (for 3C 368, polarimetry), togetherwith deep Keck spectroscopy and infrared imaging (all inhand), recommends this galaxy as an ideal target for such adetailed investigation. By thoroughly investigating 3C368,we hope to firmly establish the origin and the physics underlyingthe spectacular morphologies of high redshift radio galaxies.

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