IC 630 is a nearby early-type galaxy with a mass of 6 \times 10 ^ { 10 } M _ { \odot } with an intense burst of recent ( 6 Myr ) star formation .
It shows strong nebular emission lines , with radio and X-ray emission , which classifies it as an AGN .
With VLT-SINFONI and Gemini North-NIFS adaptive optics observations ( plus supplementary ANU 2.3m WiFeS optical IFU observations ) , the excitation diagnostics of the nebular emission species show no sign of standard AGN engine excitation ; the stellar velocity dispersion also indicate that a super-massive black hole ( if one is present ) is small ( M _ { \bullet } = 2.25 \times 10 ^ { 5 } ~ { } M _ { \odot } ) .
The luminosity at all wavelengths is consistent with star formation at a rate of about 1–2 M _ { \odot } /yr .
We measure gas outflows driven by star formation at a rate of 0.18 M _ { \odot } /yr in a face-on truncated cone geometry .
We also observe a nuclear cluster or disk and other clusters .
Photo-ionization from young , hot stars is the main excitation mechanism for [ \ion Fe2 ] and hydrogen , whereas shocks are responsible for the H _ { 2 } excitation .
Our observations are broadly comparable with simulations where a Toomre-unstable , self-gravitating gas disk triggers a burst of star formation , peaking after about 30 Myr and possibly cycling with a period of about 200 Myr .