Far-infrared and submillimeter observations of the multiple cores in S255, W3, and OMC-1 - Evidence for fragmentation?

D. T. Jaffe, J. A. Davidson, M. Dragovan, R. H. Hildebrand

Research output: Contribution to journalArticlepeer-review

Abstract

The authors present far-IR and sub-mm maps of S255 which reveal the presence of a previously undiscovered cloud core 1arcmin north of S255-IR. This second core has a mass greater than the core in S255-IR and a temperature ≡10K lower. The authors also present 40 μm - 400 μm photometry of these two cores and of the previously observed double cloud cores in W3 and OMC-1 and use the mapping and photometry results to derive temperatures, densities, masses, and visual extinctions for the cores. Molecular line observations indicate velocity differences of 1.4 - 4 km s-1 between the two cores in a given cloud. If the multiple cores at different velocities result from large-scale fragmentation of a rotating parent cloud, approximately 90% of the initial angular momentum is now in the orbital motion of the cores.
Original languageEnglish
Pages (from-to)637-642
JournalThe Astrophysical Journal
Volume284
DOIs
Publication statusPublished - 1 Sep 1984
Externally publishedYes

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