Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 409, Issue 1, Pages 396-404Publisher
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-2966.2010.17323.x
Keywords
galaxies: kinematics and dynamics; galaxies: spiral; galaxies: star clusters: general; galaxies: star formation; galaxies: structure
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We consider models of gas flow in spiral galaxies in which the spiral structure has been excited by various possible mechanisms: a global steady density wave, self-gravity of the stellar disc and an external tidal interaction, as well as the case of a galaxy with a central rotating bar. In each model we estimate in a simple manner the likely current positions of star clusters of a variety of ages, ranging from similar to 2 to around similar to 130 Myr, depending on the model. We find that the spatial distribution of clusters of different ages varies markedly depending on the model, and propose that observations of the locations of age-dated stellar clusters is a possible discriminant between excitation mechanisms for spiral structure in an individual galaxy.
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