CHEMICAL ABUNDANCES AND GAS CONTENT IN DISK GALAXIES: CORRELATIONS WITH THE lambda SPIN PARAMETER
Por:
Cervantes-Sodi, B, Hernandez, X
Publicada:
1 abr 2009
Resumen:
By using a very simple and general model to describe the dynamics of disk galaxies, we estimate the lambda spin parameter for a sample of observed galaxies and present a study in which we show that several important physical properties are intrinsically related to the dynamics of the systems. Although correlations between average metallicity with magnitude or Hubble type are evident, we obtain equally strong correlations with the spin parameter, where galaxies with low lambda valties present higher abundances and galaxies with high lambda values are poor in metals. Also, the gas content of the galaxies correlates with lambda, with high lambda systems showing higher gas mass fractions than low lambda galaxies, highlighting the important role this parameter plays in the structure of disk galaxies and the proposal of lambda as a robust and objective physical measure of galactic morphology.
Filiaciones:
Cervantes-Sodi, B:
Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico
Hernandez, X:
Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico
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