The nuclear spiral in Arp102B: accretion flow or jet-cloud interaction?

Details The nuclear spiral in Arp102B: accretion flow or jet-cloud interaction? The nuclear spiral in Arp102B: accretion flow or jet-cloud interaction?

Feb 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007noao.prop..381r&link_type=abstract

NOAO Proposal ID #2007A-0381

Physics

Scientific paper

We have recently discovered a striking two-armed spiral structure in the nucleus (inner 2") of the broad-line radio galaxy Arp102B in HST/ACS H-alpha images. We have previously used GMOS IFU spectroscopy to show that a similar feature in the Liner NGC1097 is undergoing radial streaming motions towards the nucleus and is therefore most likely an accretion flow. As the kinematics of these features can be mapped by virtue of the line emission, they are providing the first physical insights into the fuelling chain by which nuclear activity and black hole growth is sustained. However, the case of Arp102B is complicated by the presence of a one-sided radio jet, which is spatially coincident with the Eastern H-alpha arm. We therefore wish to utilize the unique capabilities of GMOS IFU to map the kinematics and excitation of the H-alpha spiral stucture in order to determine if the H-alpha structure represents a jet-ISM interaction or a spiral accretion flow.

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