We present HST/NICMOS observations of a sample of LIRGs. We show that active star formation appears to be occurring not only in the bright nuclei of these galaxies, but also in luminous super-star clusters and giant HII regions with ages of up to 20-40Myr. This population of bright clusters and HII regions is unprecedented in normal galaxies and emphasizes the effects of the extreme star formation in LIRGs.
@article{arxiv.astro-ph/0211485,
title = {Massive star formation in Luminous Infrared Galaxies},
author = {A. Alonso-Herrero and G. H. Rieke and M. J. Rieke and N. Z. Scoville},
journal= {arXiv preprint arXiv:astro-ph/0211485},
year = {2007}
}