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The origin of high velocity stars from Gaia and LAMOST
Cuihua Du, Hefan Li, Heidi Jo Newberg +4
Based on the second Gaia data (Gaia DR2) and spectroscopy from the LAMOST Data Release 5, we defined the high-velocity (HiVel) stars sample as those stars with $v_{\mathrm{gc}} > 0…
Fitting the density substructure of the stellar halo with MilkyWay@home
Jake Weiss, Heidi Jo Newberg, Matthew Newby +1
We propose and test a method for applying statistical photometric parallax to main sequence turn off (MSTO) stars in the Sloan Digital Sky Survey (SDSS). Using simulated data, we s…
The high velocity stars in the Local Stellar Halo from Gaia and LAMOST
Cuihua Du, Hefan Li, Shuai Liu +2
Based on the first Gaia data release and spectroscopy from the LAMOST Data Release 4, we study the kinematics and chemistry of the local halo stars. The halo stars are identified k…
A tangle of stellar streams in the north Galactic cap
Jake Weiss, Heidi Jo Newberg, Travis Desell
Stellar halo substructures were identified using statistical photometric parallax of blue main sequence turnoff stars from fourteen Sloan Digital Sky Survey stripes in the north Ga…
Metallicity and Kinematics of the Galactic halo from the LAMOST sample stars
Shuai Liu, Cuihua Du, Heidi Jo Newberg +8
We study the metallicity distribution and kinematic properties of 4,680 A/F/G/K-type giant stars with 5 kpc selected from the LAMOST spectroscopic survey. The metallicity di…