The [Fe/O] Ratio in Field Stars and the History of Star Formation of the Solar Neighbourhood

Details The [Fe/O] Ratio in Field Stars and the History of Star Formation of the Solar Neighbourhood The [Fe/O] Ratio in Field Stars and the History of Star Formation of the Solar Neighbourhood

Apr 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aspc...92..307g&link_type=abstract

Formation of the Galactic Halo...Inside and Out, ASP Conference Series, Vol. 92, 1996, Heather Morrison and Ata Sarajedini, eds.

Physics

52

Scientific paper

From a reanalysis of O and Fe abundances in a large sample of stars in the solar neighbourhood, we found that the Fe/O abundance ratio is nearly constant in the (inner) halo and the thick disk. Within a homogeneous collapse scenario, this means that the timescale for halo collapse was <=\ the typical lifetime of type Ia SNe progenitors ( ~ 1 Gyr). The Fe/O ratio raised by ~ 0.2 dex while the O/H ratio hold constant during the transition from the thick to thin disk phases, indicating a sudden decrease in star formation in the solar neighbourhood at that epoch.

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