The Spitzer Gould Belt Survey of Large Nearby Interstellar Clouds: Discovery of a Dense Embedded Cluster in the Serpens-Aquila Rift - AstrophysicsReportar como inadecuado




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Abstract: We report the discovery of a nearby, embedded cluster of young stellarobjects, associated filamentary infrared dark cloud, and 4.5 micron shockemission knots from outflows detected in Spitzer-IRAC mid-infrared imaging ofthe Serpens-Aquila Rift obtained as part of the Spitzer Gould Belt LegacySurvey. We also present radial velocity measurements of the region frommolecular line observations obtained with the Submillimeter Array SMA thatsuggest the cluster is co-moving with the Serpens Main embedded cluster 3degrees to the north. We therefore assign it the same distance, 260 pc. Thecore of the new cluster, which we call Serpens South, is composed of anunusually large fraction of protostars 77% at high mean surface density >430pc^-2 and short median nearest neighbor spacing 3700 AU. We perform basiccluster structure characterization using nearest neighbor surface densitymapping of the YSOs and compare our findings to other known clusters withequivalent analyses available in the literature.



Autor: R. A. Gutermuth, T. L. Bourke, L. E. Allen, P. C. Myers, S. T. Megeath, B. C. Matthews, J. K. Jørgensen, J. Di Francesco, D. War

Fuente: https://arxiv.org/







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