The Underlying Nature of Nearby BL Lac Objects

Details The Underlying Nature of Nearby BL Lac Objects The Underlying Nature of Nearby BL Lac Objects

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995hst..prop.5938u&link_type=abstract

HST Proposal ID #5938

Computer Science

Hst Proposal Id #5938 Agn

Scientific paper

The host galaxies and near environments of BL Lac objects are an important clue to their underlying nature, revealing whether they are relativistically beamed low-luminosity radio galaxies or luminous distant quasars gravitationally microlensed by foreground galaxies. In the former case, the host galaxies should be bright ellipticals in rich cluster environments; in the latter, the BL Lac nuclei should be off- center and some host galaxies should be spirals. High resolution imaging may also reveal the presence of close companions, indicative of the importance of interactions to the blazar phenomenon. We propose to study the host galaxies and environments of four radio-selected BL Lac objects from a well-defined, complete sample at redshiftS ~< 0.3. No comparable HST data exist or are planned for any BL Lac objects.

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