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Protostellar formation in rotating interstellar clouds. VIII - Inner core formationThe results are presented of a variety of spherically symmetric one-dimensional (1D) calculations intended to determine the robustness of the dynamical hiccup phenomenon in protostellar cores. The 1D models show that the phenomenon is relatively insensitive to changes in the equations of state, numerical resolution, initial density and temperature, and the radiative transfer approximation. In 1D, the hiccup results in an explosive destruction of the entire inner protostellar core. Inner core formation is studied with a sequence of three-dimensional models which show that rapid inner core rotation stabilizes the hiccup instability. Instead, the inner core becomes quite flat and undergoes a cycle of binary fragmentation, binary decay into a single object surrounded by a bar, breakup of the bar into a binary, etc. When lesser amounts of rotation are involved, the inner core does hiccup somewhat, but mass is ejected in only a few directions, leading to several broad streams of ejecta.
Document ID
19900026004
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Boss, Alan P.
(Carnegie Institution of Washington Washington, DC, United States)
Date Acquired
August 14, 2013
Publication Date
November 1, 1989
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 346
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
90A13059
Funding Number(s)
CONTRACT_GRANT: NSF AST-85-15644
CONTRACT_GRANT: NAGW-1410
Distribution Limits
Public
Copyright
Other

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