Black holes in 4 nearby radio galaxies

Creators: Mould, Jeremy; Readhead, Tony; Cotter, Garret; Batt, David; Durré, Mark

Abstract

We study the velocity dispersion profiles of the nuclei of NGC 1326, 2685, 5273 and 5838 in the CO first overtone band. There is evidence for a black hole (BH) in NGC 1326 and 5838. Gas is seen flowing out of the nuclear region of NGC 5273. We put upper limits on the nuclear BHs responsible for its activity and that of NGC 2685.

Additional Information

© 2014 Springer Science+Business Media Dordrecht. Received: 26 June 2014; Accepted: 18 October 2014; Published online: 4 March 2015. We thank our referee for comments that improved the paper. We are grateful for the support of the Australian Research Council through DP140100435. G. Cotter acknowledges support from STFC grant ST/K005596/1. Spectra were extracted using a version of the Spextool program modified for the Palomar Triple-Spec Spectrograph (Cushing et al. 2004; Cushing 2011). We acknowledge the Hubble Legacy Archive, a facility of STScI, which is operated by AURA for the National Aeronautics and Space Administration (NASA). This research has made use of the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA. This research has also made use of IRAF, software written by NOAO and data products from the Gemini Observatory, which are operated by AURA under a cooperative agreement with NSF. David Batt was a summer student at Swinburne University while this work was carried out.

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