Label Transfer From APOGEE to LAMOST and BOSS
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Date
2022-05
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Publisher
The Ohio State University
Abstract
In this century, large spectroscopic stellar surveys observe stars in a large range
of spectral types at different wavelengths, different resolutions with different data
analysis methods. In order to further study Galactic evolution, measurements of
stellar parameters for different surveys must be made precise and consistent. With
The Cannon 2, a data driven method, we can transfer stellar parameters between two
different surveys on the same scale directly. Using The Cannon 2, I investigated the
effect of the training set size on the accuracy of the predicted results. As the size of
the training set increasing, the accuracy of the inferred parameters increasing. The
training label's quality is the other factor that influences the label transfer results.
In this thesis, The Cannon 2 is also used to predicate stellar parameters for 10,000
F, G, K stars, with estimate Tef f less than 6000 K, from BOSS under the APOGEE
scale to reduce the labels' inconsistencies between two surveys.
Description
Keywords
The Cannon 2, APOGEE, LAMOST, BOSS, MaStar