The halo infall timescale

Details The halo infall timescale The halo infall timescale

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993phr...227..235t&link_type=abstract

Physics Reports, Volume 227, Issue 1-5, p. 235-242.

Physics

8

Scientific paper

There is an accumulating body of observational evidence which seems to support the view that the duration of the phase of star formation and nucleosynthesis activity in the halo of our Galaxy may have been of the order of 2-3 × 109 years. Such evidence arises from abundance determinations for metal-deficient field halo stars and globular cluster stars, as well as from age determinations for the local white dwarf population and for the halo and disk populations of globular clusters. We briefly review these diverse observational constraints on the timescale of halo evolution and discuss some possible implications for dynamical models for the collapse of the halo and the onset of star formation activity in the Galactic disk.

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