Paper:	The Pillars of the Second Generation
Volume:	267, Hot Star Workshop III: the Earliest Stages of Massive Star Birth
Page:	111
Authors:	Walborn, N. R.
Abstract:	The ubiquitous triggered, second-generation star formation around the peripheries of massive young clusters is reviewed. Frequently, the most luminous second-generation sources are located at the heads of dust pillars oriented toward the central cluster. Recent HST WFPC2 and NICMOS observations of 30 Doradus are emphasized, but a number of other regions exhibiting the phenomenon are also discussed, including the Galactic 30 Dor counterpart NGC 3603. The next evolutionary phase of such objects is the giant shell HII region, as epitomized by N11 in the LMC, NGC 604 in M33, and NGC 4214 I-A. Detailed information about the nearby objects provides valuable insights for the interpretation of more distant starbursts.

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