Bibcode
Allende-Prieto, C.; Shetrone, M.; Odewahn, S. C.; Benedict, G.; Castanheira, B. G.; de Jong, R.; Lambert, D. L.; MacQueen, P. J.; Marshall, J. L.; McArthur, B. E.; Sneden, C.; HETDEX Collaboration
Referencia bibliográfica
American Astronomical Society, AAS Meeting #219, #424.07
Advertised on:
1
2012
Número de citas
0
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Descripción
Spectroscopic surveys of stars in the Milky Way are growing rapidly in
size and scope, with the ambitious goals of unravelling the Galaxy's
formation and evolution, and finding out whether our galaxy fits the
current paradigm of hierarchical galaxy formation driven by cold dark
matter. These surveys follow target selection algorithms aimed at
extracting the most information out of a coarse sampling of the stars in
the Galaxy, and as result they are seriously biased. HETDEX will be the
first project to change that -- obtaining low-resolution (R 750) spectra
covering 350-550 nm that will render radial velocities and overall
metallicity for a flux-limited sample of > 100,000 stars down to V 20
over 60 square degrees. Questions that we hope to address include: 1)
the incidence of gross chemical peculiarities, 2) the metallicity
distributions of the main Galactic components, and 3) the frequency of
cold substructure over a range of scales. We show simulated data and
explore the performances of our preliminary data analysis software.