Deconvolving the nucleus of centaurus using a Chandra PSF library

Details Deconvolving the nucleus of centaurus using a Chandra PSF library Deconvolving the nucleus of centaurus using a Chandra PSF library

Jan 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001iaus..205...66k&link_type=abstract

Galaxies and their Constituents at the Highest Angular Resolutions, Proceedings of IAU Symposium #205, held 15-18 August 2000 at

Physics

2

Scientific paper

Centaurus A (NGC 5128) is a giant early-type galaxy containing the nearest (at 3.5 Mpc) radio-bright AGN. Cen A was observed with the Chandra X-ray Observatory on several occasions since the launch in July 1999. The high-angular resolution (less than 0.5 arcsecond on axis) Chandra images reveal X-ray multi-scale structures in this object with unprecedented detail and clarity, including the bright nucleus believed to be associated with a supermassive black hole. We explored the spatial extent of the Cen A nucleus using deconvolution techniques on the full resolution Chandra images. Model PSFs were derived from the Chandra raytrace PSF library as well as unresolved point sources observed with Chandra. The deconvolved images show that the Cen A nucleus is resolved and possibly asymmetric. We discuss several possible causes of this extended emission and of the asymmetries.

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