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- W328978078 abstract "We study the association between embedded star clusters and young stellar objects believed to be precursors of intermediate mass stars (2 10 3 L � , meaning M > 5 Maccording to accretion models), in- dicative of the presence of a large number of less massive young stellar objects. An analysis of the K-source surface density con- firms that the higher luminosity Class I sources are embedded in young clusters of sizes � 0.1-0.3 pc and volume densities > 3000-12000 stars pc 3 . Conversely, the lower luminosity Class I sources (Lbol < 10 3 L� ,i .e .,M < 5 M�) are associ- ated with small groups of young stellar objects or isolated. This indicates that intermediate mass star progenitors lie in clusters whose member richness increases with the progenitor mass it- self. The Class I sources appear as the most massive and less evolved objects in the clusters and tend to be located near the star surface density peaks, suggesting a mass and age segregation which may be partly explained by models of competitive accre- tion. TheK luminosity functions of the clusters are indicative of populations of coeval stars 10 5 -10 6 yr old roughly distributed according to the field stars initial mass function. A scenario in which clusters are formed by contraction and fragmentation of molecular cores, with less massive stars first leaving the birth- line, is proposed." @default.
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- W328978078 date "2000-01-01" @default.
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- W328978078 title "Star formation in the Vela molecular clouds. IV. Young embedded star clusters towards D-cloud class I sources" @default.
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