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Title:
A Dense Microcluster of Class 0 Protostars in NGC 2264 D-MM1
Authors:
Teixeira, Paula S.; Zapata, Luis A.; Lada, Charles J.
Affiliation:
AA(Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138; , .; Departamento de Física da Faculdade de Ciências da Universidade de Lisboa, Ed. C8, Campo Grande, 1749-016, Lisboa, Portugal.; Laboratório Associado Instituto D. Luiz-SIM, Universidade de Lisboa, Campo Grande, 1749-016, Lisboa, Portugal.), AB(Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany; .), AC(Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138; , .)
Publication:
The Astrophysical Journal, Volume 667, Issue 2, pp. L179-L182. (ApJL Homepage)
Publication Date:
10/2007
Origin:
UCP
ApJ Keywords:
Stars: Circumstellar Matter, Stars: Planetary Systems: Protoplanetary Disks, Stars: Formation, Techniques: Interferometric
DOI:
10.1086/522494
Bibliographic Code:
2007ApJ...667L.179T

Abstract

We present sensitive and high angular resolution (~1") 1.3 mm continuum observations of the dusty core D-MM1 in the Spokes cluster in NGC 2264 using the Submillimeter Array. A dense microcluster of seven Class 0 sources was detected in a 20''×20'' region with masses between 0.4 and 1.2 Msolar and deconvolved sizes of ~600 AU. We interpret the 1.3 mm emission as arising from the envelopes of the Class 0 protostellar sources. The mean separation of the 11 known sources (SMA Class 0 and previously known infrared sources) within D-MM1 is considerably smaller than the characteristic spacing between sources in the larger Spokes cluster and is consistent with hierarchical thermal fragmentation of the dense molecular gas in this region.
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