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4 papers · 1 filter
Interpreting the Ionization Sequence in AGN Emission-Line Spectra
Chris T. Richardson, James T. Allen, Jack A. Baldwin +2
We investigate the physical cause of the great range in the ionization level seen in the spectra of narrow lined active galactic nuclei (AGN). Mean field independent component anal…
Deep Chandra X-ray Imaging of a Nearby Radio Galaxy 4C+29.30: X-ray/Radio Connection
Aneta Siemiginowska, Łukasz Stawarz, Chi C. Cheung +8
We report results from our deep Chandra X-ray observations of a nearby radio galaxy, 4C+29.30 (z=0.0647). The Chandra image resolves structures on sub-arcsec to arcsec scales, reve…
A large-scale shock surrounding a powerful radio galaxy
J. H. Croston, M. J. Hardcastle, B. Mingo +4
We report the Chandra detection of a large-scale shock, on scales of 200 kpc, in the cluster surrounding the powerful radio galaxy 3C 444 (PKS 2211-17). Our 20-ks Chandra observati…
The Sudden Death of the Nearest Quasar
Kevin Schawinski, Daniel A. Evans, Shanil Virani +13
Galaxy formation is significantly modulated by energy output from supermassive black holes at the centers of galaxies which grow in highly efficient luminous quasar phases. The tim…