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| Paper: |
A Hubble Space Telescope Spectroscopic Survey of LINER/H II Transition Nuclei |
| Volume: |
290, Active Galactic Nuclei: from Central Engine to Host Galaxy |
| Page: |
387 |
| Authors: |
Barth, A. J.; Ho, L. C.; Filippenko, A. V. |
| Abstract: |
About 15% of nearby galaxies have transition-type nuclei with emission line ratios that are intermediate between those of LINERs and normal HII regions. Various mechanisms have been proposed to explain the ionization of these objects, including ionization by unusually hot stars, shock excitation, and composite systems consisting of weak AGNs surrounded by star-forming regions. We have obtained new Hubble Space Telescope spectra, using a 0.2"-wide slit, of 15 transition nuclei in nearby galaxies, in order to spatially resolve the emission regions and constrain the excitation mechanisms and power sources. In this poster, we present preliminary results from this survey. |
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