The Lyman break analogue Haro 11: spatially resolved chemodynamics with
  VLT FLAMES
  Using VLT/FLAMES optical integral field unit observations, we present the
first spatially resolved spectroscopic study of the well known blue compact
galaxy Haro11, thought to be a local analogue to high redshift Lyman Break
Galaxies. Haro11 displays complex emission line profiles, consisting of narrow
(FWHM<200 km/s) and broad (FWHM 200-300 km/s) components. We identify three
distinct emission knots kinematically connected to one another. A
chemodynamical analysis is presented, revealing that spatially resolved ionic
and elemental abundances do not agree with those derived from integrated
spectra across the galaxy. We conclude that this is almost certainly due to the
surface-brightness-weighting of electron temperature in integrated spectra,
leading to higher derived abundances. We find that the eastern knot has a low
gas density, but a higher temperature (by ~4,000 K) and consequently an oxygen
abundance ~0.4 dex lower than the neighbouring regions. A region of enhanced
N/O is found specifically in Knot C, confirming previous studies that found
anomalously high N/O ratios in this system. Maps of the Wolf-Rayet feature at
4686A reveal large WR populations (~900-1500 stars) in Knots A and B. The lack
of WR stars in Knot C, combined with an age of ~7.4 Myr suggest that a recently
completed WR phase may be responsible for the observed N/O excess. Conversely,
the absence of N-enriched gas and strong WR emission in Knots A and B suggests
we are observing these regions at an epoch where stellar ejecta has yet to cool
and mix with the ISM.
