SkyMapper stellar parameters for Galactic Archaeology on a grand-scale
Date
2019
Authors
Casagrande, Luca
Wolf, Christian
Mackey, Dougal
Nordlander, Thomas
Yong, David
Bessell, Michael
Journal Title
Journal ISSN
Volume Title
Publisher
Blackwell Publishing Ltd
Abstract
The SkyMapper photometric surveys provides uvgriz photometry for several millions sources in the Southern sky. We use DR1.1 to explore the quality of its photometry, and develop a formalism to homogenize zero-points across the sky using stellar effective temperatures. Physical flux transformations, and zero-points appropriate for this release are derived, along with relations linking colour indices to stellar parameters. Reddening-free pseudo-colours and pseudo-magnitudes are also introduced. For late-type stars which are best suited for Galactic Archaeology, we show that SkyMapper + 2MASS are able to deliver a precision better than 100 K in effective temperatures (depending on the filters), ∼0.2 dex for metallicities above −2, and a reliable distinction between M-dwarfs and -giants. Together with astrometric and asteroseismic space mission, SkyMapper promises to be a treasure trove for stellar and Galactic studies.
Description
Keywords
stars: fundamental parameters, stars: late-type, Galaxy: stellar content
Citation
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Source
Monthly Notices of the Royal Astronomical Society
Type
Journal article
Book Title
Entity type
Access Statement
Open Access