Physics
Scientific paper
Jul 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994hst..prop.5471w&link_type=abstract
HST Proposal ID #5471
Physics
Hst Proposal Id #5471 Quasars &Amp, Agn Quasars &Amp, Agn
Scientific paper
We aim to study the interaction between jets and the interstellar medium in the central few kpc of the Seyfert galaxy Markarian 78. In a long-slit survey of Seyfert galaxies, MKN 78 was identified as the outstanding example in which [OIII] 5007 profile structure clearly reveals the interaction between radio jets and the interstellar medium. Even in this optimum case, however, the important structures are within a few arcsec of the nucleus, and HST resoution is needed to trace the interaction in detail. We have already obtained a deep HST [OIII] image and a deep VLA 3.6 cm radio map, and these confirm the exceptional nature of MKN 78 as a laboratory for understanding the jet-ISM interaction. To complete our original HST proposal, we now ask for HST FOS spectra of several carefully chosen locations in the MKN 78 nebulosity. These will provide the crucial kinematic and physical information needed to converge on a detailed and unambiguous physical picture of the expanding radio source and its interaction with the circumnuclear gas. We note that at dec +65, MKN 78 is ideally placed within the CVZ (though we do not REQUIRE continuous viewing).
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