Nuclear spirals in the inner Milky Way
We use hydrodynamical simulations to construct a new coherent picture for the gas flow in the Central Molecular Zone (CMZ), the region of our Galaxy within R ≲ 500 pc. We relate connected structures observed in (l, b, v) data cubes of molecular tracers to nuclear spiral arms. These arise naturally...
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| Main Authors: | , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
21 April 2017
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| In: |
Monthly notices of the Royal Astronomical Society
Year: 2017, Volume: 469, Issue: 2, Pages: 2251-2262 |
| ISSN: | 1365-2966 |
| DOI: | 10.1093/mnras/stx944 |
| Online Access: | Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1093/mnras/stx944 Verlag, kostenfrei, Volltext: https://academic.oup.com/mnras/article/469/2/2251/3747502/Nuclear-spirals-in-the-inner-Milky-Way 
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| Author Notes: | Matthew G.L. Ridley, Mattia C. Sormani, Robin G. Treß, John Magorrian, Ralf S. Klessen |
| Summary: | We use hydrodynamical simulations to construct a new coherent picture for the gas flow in the Central Molecular Zone (CMZ), the region of our Galaxy within R ≲ 500 pc. We relate connected structures observed in (l, b, v) data cubes of molecular tracers to nuclear spiral arms. These arise naturally in hydrodynamical simulations of barred galaxies, and are similar to those that can be seen in external galaxies such as NGC 4303 or NGC 1097. We discuss a face-on view of the CMZ, including the positions of several prominent molecular clouds, such as Sgr B2, the 20 and 50 km s−1 clouds, the polar arc, Bania Clump 2 and Sgr C. Our model is also consistent with the larger scale gas flow, up to R ≃ 3 kpc, thus providing a consistent picture of the entire Galactic bar region. |
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| Item Description: | Gesehen am 24.07.2017 |
| Physical Description: | Online Resource |
| ISSN: | 1365-2966 |
| DOI: | 10.1093/mnras/stx944 |