High-Resolution Narrow-Band Imaging of LINERs, in Search of Their Central Engines

Details High-Resolution Narrow-Band Imaging of LINERs, in Search of Their Central Engines High-Resolution Narrow-Band Imaging of LINERs, in Search of Their Central Engines

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996hst..prop.6436m&link_type=abstract

HST Proposal ID #6436

Computer Science

Hst Proposal Id #6436 Agn

Scientific paper

More than 30% of all galaxies contain LINER nuclei, which may be the weakest but most common manifestation of quasar activity. The nature of LINERs has, however, remained controversial. We propose narrow-band [OIII]5007 and Halpha+[NII] imaging of the nuclei of five LINER galaxies. These galaxies are representative of two types of LINERs that have been discovered by previous HST UV observations: UV bright, possessing a compact nuclear UV continuum source, and UV dark. We will use the images to test models for the central engines of LINERs, and to see whether the difference between UV-bright and UV-dark LINERs is the result of obscuration, episodic activity of the central UV source, or the absence of an AGN-like ionizing continuum source. Comparison of the results to similar data for Seyfert nuclei will test the idea that there is continuity between the properties of LINERs and more luminous AGNs. Although this is a self-contained project with its own objectives, the results will contribute to a large, on-going program of UV spectroscopy { HST/FOS, approved Cycle 5}, IR spectroscopy { ISO, approved}, radio mapping { VLA, approved} and X-ray imaging spectroscopy { ROSAT and ASCA archival data}. The multiwavelength database from this program will allow a unique, comprehensive study of a well-defined sample of LINERs.

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