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Streaming Motions Toward The Supermassive Black Hole In Ngc 1097, Kambiz Fathi, Thaisa Storchi-Bergmann, Rogemar A. Riffel, Claudia Winge, David J. Axon, Andew Robinson, Alessandro Marconi
Streaming Motions Toward The Supermassive Black Hole In Ngc 1097, Kambiz Fathi, Thaisa Storchi-Bergmann, Rogemar A. Riffel, Claudia Winge, David J. Axon, Andew Robinson, Alessandro Marconi
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We have used GMOS-IFU and high resolution HST-ACS observations to map, in unprecedented detail, the gas velocity field and structure within the 0.7 kpc circumnuclear ring of the SBb LINER/Seyfert 1 galaxy NGC 1097. We find clear evidence of radial streaming motions associated with spiral structures leading to the unresolved (< 3.5 parsecs) nucleus, which we interpret as part of the fueling chain by which gas is transported to the nuclear starburst and supermassive black hole.
The Supermassive Black Hole In Centaurus A: A Benchmark For Gas Kinematical Measurements, Alessandro Marconi, Guia Pastorini, Franco Pacini, David J. Axon, A. Capetti, D. Macchetto, A. M. Koekemoer, E. J. Shreier
The Supermassive Black Hole In Centaurus A: A Benchmark For Gas Kinematical Measurements, Alessandro Marconi, Guia Pastorini, Franco Pacini, David J. Axon, A. Capetti, D. Macchetto, A. M. Koekemoer, E. J. Shreier
Articles
We present new HST/STIS observations of Centaurus A. [SIII] 9533A was used to study the kinematics in the nuclear region with a 0.1" spatial resolution. The STIS data and the VLT/ISAAC spectra by Marconi et al. (2001) provide independent and consistent measures of the BH mass, which are in agreement with our previous estimate based on the ISAAC data alone: MBH=(1.1+/-0.1) 10^8 Msun for a disk inclination of i=25deg or or MBH=(6.5+/-0.7) 10^7 Msun for i=35deg, the largest i value allowed by the data. We find that the choice of the intrinsic surface brightness distribution, a crucial element in the …