Structures and Spectra of Hot Gas around Nearby BL Lac Objects

Details Structures and Spectra of Hot Gas around Nearby BL Lac Objects Structures and Spectra of Hot Gas around Nearby BL Lac Objects

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cxo..prop..103b&link_type=abstract

Chandra Proposal ID #01700598

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Chandra Proposal Id #01700598

Scientific paper

If FR I radio galaxies and BL Lac objects are parts of a single population, and only their orientation causes them to appear different (the BL Lac ``unification'' scheme), then they should have the same isotropic properties. We recently extended existing radio and optical tests to the X-ray by searching near BL Lacs for X-ray emission which matches the X-ray envelopes of FR I objects found by Worrall & Birkinshaw (1994). The well-known object PKS 0521-365 shows an unexpectedly strong halo when observed with the ROSAT HRI. Here we propose to use ACIS-I to obtain images and spectroscopy for PKS 0521-365 and three other BL Lacs. The data will determine the physical relationship between halos and their AGN and test the unification scheme.

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