Imaging the NLR in a complete sample of z<0.5 radio-quiet PG quasars

Details Imaging the NLR in a complete sample of z<0.5 radio-quiet PG quasars Imaging the NLR in a complete sample of z<0.5 radio-quiet PG quasars

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8239f&link_type=abstract

HST Proposal ID #8239

Physics

Hst Proposal Id #8239 Agn Physics

Scientific paper

Quasar activity is an important and little understood phase in the evolution of galaxies, where a central engine leaves its visible imprints in the galaxy through strong ionization and heating of the ISM. But, what is the structure of these hot emission line regions in quasars? Do quasars have ionization cones due to obscuring tori, as in Seyferts? Is this emission line region different in radio-loud and radio-quiet quasars, and possibly affected by radio jets shaping the ISM, or is there a contribution from star formation? How is the emission- line region affected by different host galaxies? To answer these questions one needs the high resolution of HST. Surprisingly, however, a thorough study of quasar emission- line regions has not yet been made with HST. Here we propose to use the Linear Ramp Filters {LRF} and now available dithering techniques to survey a complete sample of the seven brightest radio-quiet z<0.5 PG quasars and image their narrow line regions {NLRs} with H ST. A similar survey of Seyfert galaxies we have conducted with the LRFs has revealed spectacular jet- and bowshock-like structures, and ionization cones. Since the NLR will be affected by the host galaxy type, energy input from the central engine, the presence or absence of a nuclear torus, different types of jets, star formation, or tidal interactions, the program will help us to investigate a number of key elements of AGN physics.

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