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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 693389.0, MPI für Astronomie / Publikationen_mpia
The progression of star formation in the Rosette Molecular Cloud
Authors:Ybarra, J. E.; Lada, E. A.; Román-Zúñiga, C. G.; Balog, Z.; Wang, J.; Feigelson, E. D.
Date of Publication (YYYY-MM-DD):2013
Title of Journal:The Astrophysical Journal
Issue / Number:2
Start Page:id. 140 (9 pp)
Audience:Not Specified
Abstract / Description:Using Spitzer Space Telescope and Chandra X-Ray Observatory data, we identify young stellar objects (YSOs) in the Rosette Molecular Cloud (RMC). By being able to select cluster members and classify them into YSO types, we are able to track the progression of star formation locally within the cluster environments and globally within the cloud. We employ the nearest neighbor method analysis to explore the density structure of the clusters and YSO ratio mapping to study age progressions in the cloud. We find a relationship between the YSO ratios and extinction that suggests star formation occurs preferentially in the densest parts of the cloud and that the column density of gas rapidly decreases as the region evolves. This suggests rapid removal of gas may account for the low star formation efficiencies observed in molecular clouds. We find that the overall age spread across the RMC is small. Our analysis suggests that star formation started throughout the complex around the same time. Age gradients in the cloud appear to be localized and any effect the H II region has on the star formation history is secondary to that of the primordial collapse of the cloud.
Free Keywords:ISM: clouds; ISM: individual objects: Rosette Molecular Cloud; methods: data analysis; stars: formation
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
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