Physics – Optics
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21425701m&link_type=abstract
American Astronomical Society, AAS Meeting #214, #257.01; Bulletin of the American Astronomical Society, Vol. 41, p.757
Physics
Optics
Scientific paper
The James Webb Space Telescope and Adaptive Optics on the Thirty Meter Telescope will provide deep, high spatial resolution windows on the near-infrared universe. These missions will potentially resolve individuals stars in galaxies out to the Virgo Cluster and beyond. However, in order to take full advantage of these capabilities a better understanding of the IR properties of stars especially in their luminous, later evolutionary states, (e.g. red giant branch and asymptotic giant branch) are required. As a first step, we are acquiring high spatial resolution near-IR imaging of stars in nearby galaxies that already have well characterized star formation histories from optical HST data. Here we report the star formation history of dwarf irregular galaxy KKH 98 as derived from near-infrared Keck Adaptive Optics images of over 400 IR bright stars. The IR derived star formation history is a good match to that derived from optical HST data of over 4000 stars. We discuss the age ranges over which each waveband is most reliable.
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