The Milky Way Tomography with SDSS and LSST

Details The Milky Way Tomography with SDSS and LSST The Milky Way Tomography with SDSS and LSST

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009pobeo..86..109i&link_type=abstract

Publications of the Astronomical Observatory of Belgrade, vol. 86, pp. 109-116

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Scientific paper

The accurate multi-band SDSS photometry to a faint limit and over a large fraction of the sky has enabled tomographic studies of the Milky Way structure: for main sequence stars, the photometric distance estimates are sufficiently precise (˜10 per cent) to directly map the three-dimensional distribution of stars at distances exceeding 10 kpc, and to study distributions of various other parameters. In particular, the SDSS photometry also enables fairly precise metallicity estimates (˜0.2 dex) for F and G stars, and comparison of positions measured by SDSS and half a century earlier Palomar Observatory Sky Survey results in accurate proper motions (random errors of ˜3-5 mas/yr). We summarize recent SDSS results based on this tomographic approach, and discuss what further progress in this context can be expected from the Large Synoptic Survey Telescope (LSST). LSST will obtain similar imaging data as SDSS to about 5 magnitudes deeper limit, and over twice as large sky area.

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