The disc-dominated host galaxy of FR-I radio source B2 0722+30
We present new observational results that conclude that the nearby radio galaxy B2 0722+30 is one of the very few known disc galaxies in the low–redshift Universe that host a classical double–lobed radio source. In this paper, we use H i observations, deep optical imaging, stellar population synthesis modelling and emission–line diagnostics to study the host galaxy, classify the active galactic nucleus (AGN) and investigate environmental properties under which a radio–loud AGN can occur in this system. Typical for spiral galaxies, B2 0722+30 has a regularly rotating gaseous disc throughout which star formation occurs. Dust heating by the ongoing star formation is likely responsible for the high infrared luminosity of the system. The optical emission–line properties of the central region identify a Low Ionization Nuclear Emission–line Region (LINER)–type nucleus with a relatively low [O iii] luminosity, in particular when compared with the total power of the Fanaroff & Riley type–I radio source that is present in this system. This classifies B2 0722+30 as a classical radio galaxy rather than a typical Seyfert galaxy. The environment of B2 0722+30 is extremely H i–rich, with several nearby interacting galaxies. We argue that a gas–rich interaction involving B2 0722+30 is a likely cause for the triggering of the radio AGN and/or the fact that the radio source managed to escape the optical boundaries of the host galaxy.
Subjectskinematics and dynamics
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From major merger to radio galaxy: Low surface-brightness stellar counterpart to the giant HI ring around B2 0648+27 (Research Note) Emonts, B.H.C.; Morganti, R.; van Gorkom, J.H.; Oosterloo, T.A.; Brogt, E.; Tadhunter, C.N. (University of Canterbury. University Centre for Teaching and LearningUniversity of Canterbury. AVC Research Office, 2008)We present the detection of a low surface-brightness stellar counterpart to an enormous (190 kpc) ring of neutral hydrogen (HI) gas that surrounds the nearby radio galaxy B2 0648+27. This system is currently in an ...
Rowlands, K.; Dunne, L.; Dye, S.; Aragon-Salamanca, A.; Maddox, S.; da Cunha, E.; Smith, D.J.B.; Bourne, N.; Eales, S.; Gomez, H.L.; Smail, I.; Alpaslan, M.; Clark, C.J.R.; Driver, S.; Ibar, E.; Ivison, R.J.; Robotham, A.; Smith, M.W.L.; Valiante, E. (University of Canterbury. Physics and Astronomy, 2014)We present a comparison of the physical properties of a rest-frame 250μm selected sample of massive, dusty galaxies from 0 < z < 5.3. Our sample comprises 29 high- redshift submillimetre galaxies (SMGs) from the literature, ...
Emonts, B.H.C.; Morganti, R.; Struve, C.; Oosterloo, T.A.; van Moorsel, G.; Tadhunter, C.N.; van der Hulst, J.M.; Brogt, E.; Holt, J.; Mirabal, N. (University of Canterbury. AVC Research Office, 2010)n important aspect of solving the long-standing question as to what triggers various types of active galactic nuclei (AGN) involves a thorough understanding of the overall properties and formation history of their host ...