Formation of massive, dense cores by cloud–cloud collisions
نویسندگان
چکیده
منابع مشابه
Studies of dense cores in regions of massive star formation
We report the results of a multitransitional study of four southern molecular clouds in the CS J = 2−1, J = 3−2, J = 5 − 4, J = 7 − 6; CO J = 1 − 0, J = 3 − 2; C34S J = 2 − 1 and C18O J = 1 − 0 lines observed with SEST and CSO telescopes. To analyze the obtained maps we applied a MEM deconvolution technique which improves the resolution significantly, if the signal-to-noise ratio is sufficientl...
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Context. High-mass stars, though few in number, play a major role in the interstellar energy budget and the shaping of the Galactic environment. However, despite this importance, the formation of high-mass stars is not well understood, due to their large distances, short time scales, and heavy extinction. Aims. Chemical composition of the massive cores forming high-mass stars can put some const...
متن کاملHNCO in massive galactic dense cores
We surveyed 81 dense molecular cores associated with regions of massive star formation and Sgr A in the JK−1K1 = 505 − 404 and 10010 − 909 lines of HNCO. Line emission was detected towards 57 objects. Selected subsamples were also observed in the 101 − 000, 404 − 303, 707 − 606, 15015 − 14014, 16016 − 15015 and 21021 − 20020 lines, covering a frequency range from 22 to 461 GHz. HNCO lines from ...
متن کاملS-bearing molecules in massive dense cores
Context. Although few in number, high-mass stars play a major role in the interstellar energy budget and the shaping of the Galactic environment; however, the formation of high-mass stars is not well understood, because of their large distances, short time scales, and heavy extinction. Aims. The chemical composition of the massive cores forming high-mass stars can put some constraints on the ti...
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The current generation of millimeter interferometers have revealed a population of compact (r ∼< 0.1 pc), massive (M ∼ 100 M⊙) gas cores that are the likely progenitors of massive stars. I review models for the evolution of these objects from the observed massive core phase through collapse and into massive star formation, with particular attention to the least wellunderstood aspects of the pro...
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ژورنال
عنوان ژورنال: Publications of the Astronomical Society of Japan
سال: 2018
ISSN: 0004-6264,2053-051X
DOI: 10.1093/pasj/psy011