Exploring the SDSS Dataset with Linked Scatter Plots: I. EMP, CEMP, and
  CV Stars
  We present the results of a search for extremely metal-poor (EMP),
carbon-enhanced metal-poor (CEMP), and cataclysmic variable (CV) stars using a
new exploration tool based on linked scatter plots (LSPs). Our approach is
especially designed to work with very large spectrum data sets such as the
SDSS, LAMOST, RAVE, and Gaia data sets, and it can be applied to stellar,
galaxy, and quasar spectra. As a demonstration, we conduct our search using the
SDSS DR10 data set. We first created a 3326-dimensional phase space containing
nearly 2 billion measures of the strengths of over 1600 spectral features in
569,738 SDSS stars. These measures capture essentially all the stellar atomic
and molecular species visible at the resolution of SDSS spectra. We show how
LSPs can be used to quickly isolate and examine interesting portions of this
phase space. To illustrate, we use LSPs coupled with cuts in selected portions
of phase space to extract EMP stars, CEMP stars, and CV stars. We present
identifications for 59 previously unrecognized candidate EMP stars and 11
previously unrecognized candidate CEMP stars. We also call attention to 2
candidate He~II emission CV stars found by the LSP approach that have not yet
been discussed in the literature.
