TITLE:
Galaxy Formation and Chemical Evolution
AUTHORS:
Sandeep Sahijpal
KEYWORDS:
Galactic Chemical Evolution, Galaxy Formation, Solar Neighborhood, Solar Elemental Abundances
JOURNAL NAME:
International Journal of Astronomy and Astrophysics,
Vol.4 No.3,
August
22,
2014
ABSTRACT: The manner the galaxy
accretes matter, along with the star formation rates at different epochs,
influences the evolution of the stable isotopic inventories of the galaxy. A
detailed analysis is presented here to study the dependence of the galactic
chemical evolution on the accretion scenario of the galaxy along with the star
formation rate during the early accretionary phase of the galactic thick disk
and thin disk. Our results indicate that a rapid early accretion of the galaxy
during the formation of the galactic thick disk along with an enhanced star
formation rate in the early stages of the galaxy accretion could explain the
majority of the galactic chemical evolution trends of the major elements.
Further, we corroborate the recent suggestions regarding the formation of a
massive galactic thick disk rather than the earlier assumed low mass thick
disk.