13 February 2003 Preliminary abundance analysis of galactic bulge main sequence, subgiant, and giant branch stars observed during microlensing with Keck/HIRES
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Abstract
We present an abundance analysis of six main sequence turnoff, subgiant, and giant branch stars toward the Galactic bulge that were observed with Keck/HIRES during microlensing events. This is an early look at the first detailed chemical analysis of main sequence stars in the Galactic bulge. Lensing events allow the effective aperture of Keck to be increased beyond its current dimensions; although, some events still stretched its spectroscopic capabilities. Future large telescopes with high resolution and high throughput spectrometers will allow the study of abundances in distant stellar populations and in less evolved stars with greater ease.
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Robert M. Cavallo, Kem Holland Cook, D. Minniti, T. Vandehei, "Preliminary abundance analysis of galactic bulge main sequence, subgiant, and giant branch stars observed during microlensing with Keck/HIRES", Proc. SPIE 4834, Discoveries and Research Prospects from 6- to 10-Meter-Class Telescopes II, (13 February 2003); doi: 10.1117/12.457702; https://doi.org/10.1117/12.457702
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