Deconvolving the Nucleus of Centaurus A Using Chandra PSF Library
| Autor: | David A. Schwartz, R. P. Kraft, Andrea Prestwich, C. Jones, D. Jerius, Ethan J. Schreier, S. S. Murray, Ian N. Evans, Almus T. Kenter, G. Fabbiano, Margarita Karovska, T. Aldcroft, Dong-Woo Kim, M. Elvis, F. A. Primini, Michael Juda, W. Cui, Takashi Isobe, Terrance J. Gaetz |
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| Rok vydání: | 2001 |
| Předmět: |
Physics
X-ray astronomy Supermassive black hole Active galactic nucleus High-energy astronomy Astrophysics::High Energy Astrophysical Phenomena Centaurus A Resolution (electron density) Astronomy Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Galaxy Observatory Astrophysics::Solar and Stellar Astrophysics Astrophysics::Galaxy Astrophysics |
| Zdroj: | Symposium - International Astronomical Union. 205:66-69 |
| ISSN: | 0074-1809 |
| DOI: | 10.1017/s0074180900220445 |
| Popis: | Centaurus A (NGC 5128) is a giant early-type galaxy containing the nearest (at 3.5 Mpc) radio-bright Active Galactic Nucleus (AGN). Cen A was observed with the High Resolution Camera (HRC) on the Chandra X-ray Observatory on several occasions since the launch in July 1999. The high-angular resolution (less than 0.5 arcsecond) Chandra/HRC 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 point spread functions (PSFs) were derived from the standard 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 asymmetric. We discuss several possible causes of this extended emission and of the asymmetries. |
| Databáze: | OpenAIRE |
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