STIS Spectroscopy of Markarian 78

Details STIS Spectroscopy of Markarian 78 STIS Spectroscopy of Markarian 78

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7404w&link_type=abstract

HST Proposal ID #7404

Physics

Hst Proposal Id #7404 Agn/Quasars

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 resolution 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 STIS spectra across the MKN 78 nebulosity. These spectra will provide the crucial kinematic and physical information needed to converge on a detailed physical picture of the expanding radio source and its interaction with the circumnuclear gas. We note that although the object lies in the CVZ, we need a specific ORIENT and are therefore not requesting CVZ status {see p54 in call for proposals}.

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