New ``Orion Population'' Emission Line Stars in the Taurus Star Formation Region

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Scientific paper

SDSS imaging and spectroscopic data for the Taurus star formation region have been used to find nineteen probable new T Tau stars of spectral type M2 - M6 and five new Herbig Ae stars. The Ae stars have broad H$\alpha$ emission and in some cases emission in the Paschen lines. The candidate T Tau stars are characterized by bright emission in the hydrogen Balmer lines and the CaII H and K lines, by weak absorption in the NaI 8190\AA{} doublet, indicating low gravity, by excess emission at the reddest wavelengths, and by excess emission in the u band, all indicators of their pre-main sequence nature. The SDSS colors of these and other known T Tau stars are used to identify candidate T Tau stars from the photometric data and to trace their distribution across the Taurus dark cloud. Based on data from the Sloan Digital Sky Survey (http://www.sdss.org/). This research is supported by NASA via grant 1264472 to Princeton University.

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