Browsing by Subject "Galactic dynamics"

Browsing by Subject "Galactic dynamics"

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    The asymmetric drift, the local standard of rest, and implications from RAVE data 
    Golubov, O.; Just, A.; Bienayme, O.; Bland-Hawthorn, J.; Gibson, Brad K.; Grebel, E. K.; Munari, U.; Navarro, J. F.; Parker, Q.; Seabroke, G. (EDP Sciences, 2013-09)
    Context. The determination of the local standard of rest (LSR), which corresponds to the measurement of the peculiar motion of the Sun based on the derivation of the asymmetric drift of stellar populations, is still a ...

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    Cloud angular momentum and effective viscosity in global SPH simulations with feedback 
    Williamson, David John; Thacker, Robert John, 1970-; Wurster, James Howard; Gibson, Brad K. (Oxford University Press, 2014-08-21)
    We examine simulations of isolated galaxies to analyse the effects of localized feedback on the formation and evolution of molecular clouds. Feedback contributes to turbulence and the destruction of clouds, leading to a ...

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    Effective viscosity from cloud–cloud collisions in 3D global smoothed particle hydrodynamics simulations 
    Williamson, David John; Thacker, Robert John, 1970- (Oxford Academic, 2012-04)
    Analytic estimates of the viscous time-scale due to cloud–cloud collisions have been as high as thousands of Gyr. Consequently, cloud collisions are widely ignored as a source of viscosity in galactic discs. However, ...

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    The environmental dependence of neutral hydrogen in the GIMIC simulations 
    Cunnama, D.; Andrianomena, S.; Cress, C. M.; Faltenbacher, A.; Gibson, Brad K.; Theuns, T. (Oxford University Press, 2014-01-10)
    We use the Galaxies-Intergalactic Medium Interaction Calculation (GIMIC) cosmological hydrodynamic simulation at z = 0 to study the distribution and environmental dependence of neutral hydrogen (H I) gas in the outskirts ...

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    The halo shape and evolution of polar disc galaxies 
    Snaith, O. N.; Gibson, Brad K.; Brook, C. B.; Knebe, A.; Thacker, Robert John, 1970-; Quinn, T. R.; Governato, F.; Tissera, P. B. (Oxford University Press, 2012-09)
    We examine the properties and evolution of a simulated polar disc galaxy. This galaxy is composed of two orthogonal discs, one of which contains old stars (old stellar disc) and the other both younger stars and cold gas ...

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    The properties of the local spiral arms from RAVE data: two-dimensional density wave approach 
    Siebert, A.; Famaey, B.; Binney, J.; Burnett, B.; Faure, C.; Minchev, I.; Williams, M. E. K.; Bienayme, O.; Bland-Hawthorn, J.; Boeche, C.; Gibson, Brad K. (Oxford University Press, 2012-09)
    Using the Radial Velocity Experiment (RAVE) survey, we recently brought to light a gradient in the mean galactocentric radial velocity of stars in the extended solar neighbourhood. This gradient likely originates from ...