Star formation and gas inflows in the OH Megamaser galaxy IRAS03056+2034
  We have obtained observations of the OH Megamaser galaxy IRAS03056+0234 using
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 to star forming regions. The GMOS-IFU
data cover the spectral range of 4500 to 7500 \AA\ 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 1.2$\times$
10$^{8}$M$_{\odot}$, an ionizing photon luminosity of log Q[H$^{+}$]=53.8 and a
star formation rate of 4.9 M$_{\odot}$ 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 $\sim$45 km s$^{-1}$ and a mass inflow
rate of $\sim$7.7$\times$10$^{-3}$ M$_{\odot}$ yr$^{-1}$.
