The White Dwarf Cooling Age of NGC 6397
Brad Hansen (UCLA) - 13 Feb at 12:00 noon
The globular cluster NGC 6397 is one of the most metal poor
clusters in the Galaxy and thus presumably a fossil remnant from the
earliest stages of the formation of our galaxy. We report on deep HST
observations of this nearby cluster which probe the white dwarf cooling
sequence in this cluster in unprecedented detail. When combined with
white dwarf atmosphere and cooling models, this yields strong constraints
on the age of the cluster and constrains the formation epoch of the
globular cluster system.
The seminar will be held in 544 Campbell Hall.
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