The turbulent environment of low-mass dense cores
نویسندگان
چکیده
منابع مشابه
Non - Gaussian velocity shears in the environment of low mass dense cores
Abstract. We report on a novel kind of small scale structure in molecular clouds found in IRAM-30m and CSO maps of CO and CO lines around low mass starless dense cores. These structures come to light as the locus of the extrema of velocity shears in the maps, computed as the increments at small scale (∼ 0.02 pc) of the line velocity centroids. These extrema populate the non-Gaussian wings of th...
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We review the properties of low mass dense molecular cloud cores, including starless, prestellar, and Class 0 protostellar cores, as derived from observations. In particular we discuss them in the context of the current debate surrounding the formation and evolution of cores. There exist several families of model scenarios to explain this evolution (with many variations of each) that can be tho...
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Aims. The aim of this paper is to study with high angular resolution a dense core associated with a low-luminosity IRAS source, IRAS 00213+6530, in order to investigate whether low mass star formation is really taking place in isolation. Methods. We carried out observations at 1.2 mm with the IRAM 30 m telescope, and VLA observations in the continuum mode at 6 cm, 3.6 cm, 1.3 cm and 7 mm, toget...
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In a study of the velocity dispersion of molecular gas in maps of four dense cores, we Ðnd that : 3 (1) within the interiors of dense cores, the line widths are roughly constant at a value slightly but signiÐcantly higher than a purely thermal line width ; and (2) at the edges of the maps of the dense cores, it appears that the line width starts to increase. We suggest that these dense cores ar...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2006
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921307001172