1206.0740 (C. B. Brook et al.)

Thin disc, Thick Disc and Halo in a Simulated Galaxy    [PDF]

C. B. Brook, G. S. Stinson, B. K. Gibson, D. Kawata, E. L. House, M. S. Miranda, A. V. Macciò, K. Pilkington, R. Roškar, J. Wadsley, T. R. Quinn

Within a cosmological hydrodynamical simulation, we form a disc galaxy with sub- components which can be assigned to a thin stellar disc, thick disk, and a low mass stellar halo via a chemical decomposition. The thin and thick disc populations so selected are distinct in their ages, kinematics, and metallicities. Thin disc stars are young (<6.6 Gyr), possess low velocity dispersion ({\sigma}U,V,W = 41, 31, 25 km/s), high [Fe/H], and low [O/Fe]. The thick disc stars are old (6.6View original: http://arxiv.org/abs/1206.0740