| |
 |
| Paper: |
M/L ratios of two LMC globular clusters - NGC 1835 and NGC 1978 |
| Volume: |
13, The Formation and Evolution of Star Clusters |
| Page: |
158 |
| Authors: |
Meylan, G.; Dubath, P.; Mayor, M. |
| Abstract: |
Projected velocity dispersions are deduced from integrated light spectra of the cores of two LMC globular clusters: NGC 1835 and NGC 1978. A numerical cross-correlation technique gives a projected velocity dispersion percent(core) = 10.1 +/- 0.2 km/s in the case of NGC 1835 and percent(core) = 5.8 +/- 1.2 km/s in the case of NGC 1978. Multimass anisotropic King-Michie dynamical models are applied to the observational constraints given by the surface brightness profiles and the above central projected velocity dispersions. For NGC 1835, depending on the model, the values obtained for the total mass of the cluster range from 0.70 to 1.55 10 exp 6 solar masses, corresponding to mass-to-light ratios M/L(V) ranging from 2.5 to 5.2 (M/L(V)) solar. For NGC 1978, depending on the model, the values obtained for the total mass of the cluster range from 0.36 to 1.44 10 exp 6 solar masses, corresponding to mass-to-light ratios M/L(V) ranging from 1.2 to 4.2 (M/L(V)) solar. These values are typical of rich galactic globular clusters. |
|
|
|
|
|
