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Paper: HST Images of B2 Radio Galaxies: The Link between Circumnuclear Dust and Radio Properties
Volume: 249, The Central Kiloparsec of Starbursts and AGN: the La Palma Connection
Page: 306
Authors: de Ruiter, H. R.; Parma, P.; Fanti, R.; Capetti, A.; Morganti, R.
Abstract: We discuss V and I HST images of radio galaxies selected from the B2 sample of low-luminosity radio galaxies. Absorption maps were constructed that highlight the presence of circumnuclear dust on scales of typically a few kpc or less. Dust is detected in about half of the radio galaxies observed. Our basic conclusion is that the weaker radio galaxies (with power below 1024 W Hz-1) often have jets that tend to be perpendicular to the dust features, while the dust masses and sizes (of order 104.4 Modot and 500 pc respectively) are smaller than in galaxies with higher radio luminosities. There is a linear correlation between the dust mass detected near the nucleus and radio power; this correlation holds either for total or core radio power.
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