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Paper: Three Concurrent Phases of Massive-Star Evolution in a Pulsar-Wind Nebula
Volume: 425, Hot and Cool: Bridging Gaps in Massive Star Evolution
Page: 277
Authors: Morris, P.; Van Dyk, S.; Mauerhan, J.; Hillier, D. J.; Lang, C.
Abstract: The nebular material associated the the SNR G54.1+0.3 (hereafter G54) contains the the first reported instance of triggered star formation in the immediate vicinity of a Pulsar and its Wind Nebula (PWN). With 2MASS and Spitzer colors and followup near-IR spectroscopy, we have discovered the presence of a hot, massive and most likely evolved Be-type star among the cluster of stars hosted by the pulsar. This star has probably triggered cloud collapse and formation of at least 11 YSOs, which ring the nebula. In this unique cluster are now identified three concurrent stages of stellar evolution, from massive star birth, post-Main-Sequence transition, and stellar death.
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