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The Milky Way Tomography with SDSS: III. Stellar Kinematics
N. A. Bond, Z. Ivezic, B. Sesar +2
We study Milky Way kinematics using a sample of 18.8 million main-sequence stars with r<20 and proper-motion measurements derived from SDSS and POSS astrometry, including ~170,000…
Discovery of a New, Polar-Orbiting Debris Stream in the Milky Way Stellar Halo
Heidi Jo Newberg, Brian Yanny, Benjamin A. Willett
We show that there is a low metallicity tidal stream that runs along l=143 deg. in the South Galactic Cap, about 34 kpc from the Sun, discovered from SEGUE stellar velocities. Sinc…
Tracing Sagittarius Structure with SDSS and SEGUE Imaging and Spectroscopy
Brian Yanny, Heidi Jo Newberg, Jennifer A. Johnson +12
We show that the Sagittarius dwarf tidal stream can be traced with very red K/M-giant stars selected from SDSS photometry. A subset of these stars are spectroscopically confirmed w…
SEGUE: A Spectroscopic Survey of 240,000 stars with g=14-20
II SEGUE Collaboration, Brian Yanny, Constance Rockosi +2
The SEGUE survey obtained 240,000 moderate resolution (R = 1800) spectra from 3900 - 9000 Angstroms of fainter Milky Way stars (14.0 < g < 20.3) of a wide variety of spectral types…
An Orbit Fit for the Grillmair Dionatos Cold Stellar Stream
Benjamin A. Willett, Heidi Jo Newberg, Haotong Zhang +2
We use velocity and metallicity information from SDSS and SEGUE stellar spectroscopy to fit an orbit to the narrow stellar stream of Grillmair and Dionatos. The stars in…