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- Title
Temperature Evolution of Molecular Clouds in the Central Molecular Zone.
- Authors
Krieger, Nico; Ott, Jürgen; Walter, Fabian; Kruijssen, J. M. Diederik; Beuther, Henrik; Crocker, Roland M.; Longmore, Steven N.; Bicknell, Geoffrey V.
- Abstract
We infer the absolute time dependence of kinematic gas temperature along a proposed orbit of molecular clouds in the Central Molecular Zone (CMZ) of the Galactic Center (GC). Ammonia gas temperature maps are one of the results of the “Survey of Water and Ammonia in the Galactic Center” (SWAG, PI: J. Ott); the dynamical model of molecular clouds in the CMZ was taken from Kruijssen et al. (2015). We find that gas temperatures increase as a function of time in both regimes before and after the cloud passes pericenter on its orbit in the GC potential. This is consistent with the recent proposal that pericenter passage triggers gravitational collapse. Other investigated quantities (line width, column density, opacity) show no strong sign of time dependence but are likely dominated by cloud-to-cloud variations.
- Publication
Proceedings of the International Astronomical Union, 2016, Vol 11, Issue S322, p160
- ISSN
1743-9213
- Publication type
Article
- DOI
10.1017/S1743921316011960