Star formation and gas inflows in the OH megamaser galaxy IRAS03056+2034

We have obtained observations of the OH megamaser galaxy IRAS03056+2034 using the Gemini Multi-Object Spectrograph (GMOS) Integral Field Unit (IFU), Very Large Array (VLA), and Hubble Space Telescope (HST). The HST data reveals spiral arms containing knots of emission associated with star-forming regions. The GMOS-IFU data cover the spectral range of 4500-7500 angstrom at a velocity resolution of 90 km s(-1) and spatial resolution of 506 pc. The emission-line flux distributions reveal a ring of star-forming regions with radius of 786 pc centred at the nucleus of the galaxy, with an ionized gas mass of 2.1 x 10(5) M-circle dot, an ionizing photon luminosity of log Q[H+] = 53.3, and a star formation rate of 1.4 M-circle dot yr(-1). The emission-line ratios and radio emission suggest that the gas at the nuclear region is excited by both starburst activity and an active galactic nucleus. The gas velocity fields are partially reproduced by rotation in the galactic plane, but show, in addition, excess redshifts to the east of the nucleus, consistent with gas inflows towards the nucleus, with velocity of similar to 45 km s(-1) and a mass inflow rate of similar to 2.2 x 10(-3) M-circle dot yr(-1).