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Published September 1, 2000 | Accepted Version + Published
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Star Formation in Clusters: Early Subclustering in the Serpens Core

Testi, Leonardo ORCID icon
Sargent, Anneila I. ORCID icon
Olmi, Luca ORCID icon
Onello, Joseph S.
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Abstract

We present high-resolution interferometric and single-dish observations of molecular gas in the Serpens cluster-forming core. Star formation does not appear to be homogeneous throughout the core, but is localized in spatially and kinematically separated subclusters. The stellar (or protostellar) density in each of the subclusters is much higher than the mean for the entire Serpens cluster. This is the first observational evidence for the hierarchical fragmentation of protocluster cores suggested by cluster formation models.

Additional Information

© 2000 The American Astronomical Society. Received 2000 March 3; accepted 2000 May 24; published 2000 August 22. We thank Cathie Clarke and the referee, Paul Ho, for comments that much improved this Letter. The Owens Valley millimeter-wave array is supported by NSF grant AST 96-13717. Research on young star and disk systems is also supported by the Norris Planetary Origins Project and NASA's Origins of Solar Systems program (through grant NAGW-4030). The FCRAO observations were supported by NSF grant AST 97-25951. J. S. O. thanks the Cornell University Department of Astronomy for continuing support and warm hospitality.

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Published - Testi_2000_ApJ_540_L53.pdf

Accepted Version - 0005522.pdf

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