Barnard 59: No Evidence for Further Fragmentation

Details Barnard 59: No Evidence for Further Fragmentation Barnard 59: No Evidence for Further Fragmentation

2012-01-10

arxiv.org/abs/1201.2129v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

15 pages, 2 figures, 2 tables. Accepted by The Astrophysical Journal

Scientific paper

The dense molecular clump at the center of the Barnard 59 (B59) complex is the only region in the Pipe Nebula that has formed a small,stellar cluster. The previous analysis of a high resolution near-IR dust extinction map revealed that the nuclear region in B59 is a massive, mostly quiescent clump of 18.9 solar masses. The clump shows a monolithic profile, possibly indicating that the clump is on the way to collapse, with no evident fragmentation that could lead to another group of star systems. In this paper we present new analysis that compares the dust extinction map with a new dust emission radio-continuum map of higher spatial resolution. We confirm that the clump does not show any significant evidence for prestellar fragmentation at scales smaller than those probed previously.

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