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Evidence of Fanning in the Ophiuchus Stream
B. Sesar, A. M. Price-Whelan, J. G. Cohen +11
The Ophiuchus stellar stream presents a dynamical puzzle: its old stellar populations ( Gyr) cannot be reconciled with (1) its orbit in a simple model for the Milky Way po…
The Time Domain Spectroscopic Survey: Variable Object Selection and Anticipated Results
Eric Morganson, Paul J. Green, Scott F. Anderson +37
We present the selection algorithm and anticipated results for the Time Domain Spectroscopic Survey (TDSS). TDSS is an SDSS-IV eBOSS subproject that will provide initial identifica…
The Nature and Orbit of the Ophiuchus Stream
B. Sesar, J. Bovy, E. J. Bernard +20
The Ophiuchus stream is a recently discovered stellar tidal stream in the Milky Way. We present high-quality spectroscopic data for 14 stream member stars obtained using the Keck a…