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We present deep, intermediate resolution, long slit Gemini GMOS-S opticalspectra of the SDSS type II quasar J002531-104022, which is a highly disturbedsystem currently undergoing a major merger event. We use these data to modelthe ages and reddenings of the stellar populations in three distinct spatialregions and find a remarkable uniformity in the properties of the young stellarpopulations (YSP) that dominate the optical spectra. The YSPs are all found tohave relatively young ages (tysp < 40$ Myr), strongly implying that the latestepisode of star formation and quasar activity have been triggeredquasi-simultaneously. The lack of reddening deduced from both continuummodelling and the measured Balmer decrements (E(B-V) <0.3) suggests thatstarburst and/or AGN induced outflows have already effectively removed asubstantial proportion of the gas and dust from the central region. Thesefindings starkly contrast with model predictions which suggest an offset of afew 100 Myr between the peak of merger induced star formation and the emergenceof the optically visible quasar activity. Based on our stellar population fitswe also show that the total stellar mass is in the range (4 - 17) X 10^10 solarmasses, lower than typically found for quasar host galaxies.

Clear evidence for the early triggering of a luminous quasar-like AGN in a major, gas rich merger