Journal
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
Volume 62, Issue 6, Pages 1413-1422Publisher
OXFORD UNIV PRESS
DOI: 10.1093/pasj/62.6.1413
Keywords
Galaxy: disk; Galaxy: kinematics and dynamics; galaxies: ISM; galaxies: spiral; method: numerical
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Funding
- NINS
- Japan Society for the Promotion of Science
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We modeled the gas dynamics of barred galaxies using a three-dimensional, high-resolution, N-body + hydrodynamical simulation, and applied it to the Milky Way in an attempt to reproduce both the large-scale structure and the clumpy morphology observed in galactic H I and CO l-v diagrams. Owing to including of the multi-phase interstellar medium, self-gravity, star-formation, and supernovae feedback, the clumpy morphology, as well as the large-scale features, in observed l-v diagrams were naturally reproduced. We identified in our l-v diagrams with a number of not only large-scale peculiar features, such as the '3-kpc arm', '135-km s(-1) arm', and 'Connecting arm', but also clumpy features, such as 'Bania clumps', and then linked these features in a face-on view of our model. We give suggestions on the real structure of the Milky Way and on the fate of gas clumps in the central region.
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