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The r-process Alliance; abundances in 519 stars
We derive dynamical parameters for a large sample of 446 r-process-enhanced (RPE) metal-poor stars in the halo and disk systems of the Milky Way, based on data releases from the... -
On use of field RR Lyrae as galactic probes. II.
We performed the largest and most homogeneous spectroscopic survey of field RR Lyraes (RRLs). We secured ~6300 high-resolution (HR, R~35000) spectra for 143 RRLs (111... -
Composition, bright & faint Red Clump Starsin MW bulge
The double red clump (RC) observed in color-magnitude diagrams of the Milky Way bulge is at the heart of the current debate on the structure and formation origin of the bulge.... -
HMXB-dominant galaxy sample and properties
In this work, we present detailed constraints on the metallicity dependence of the high-mass X-ray binary (HMXB) X-ray luminosity function (XLF). We analyze ~5Ms of Chandra data... -
Initial vs final sample of the VMP HK/HES stars
We analyze the dynamical properties of ~1500 very metal-poor (VMP; [Fe/H]<~-2.0) halo stars, based primarily on medium-resolution spectroscopic data from the HK and... -
Activity & Magnetic Analysis of Flare Stars. II.
We present an investigation of the magnetic activity and flare characteristics of the subgiant stars mostly from F and G spectral types and compare the results with the... -
Abundances for M31 RGB stars from Keck/DEIMOS
We present measurements of [Fe/H] and [{alpha}/Fe] for 128 individual red giant branch stars (RGB) in the stellar halo of M31, including its Giant Stellar Stream (GSS), obtained... -
Photometric obs. & LAMOST sp. of 4 W UMa binaries
We present new photometric data and LAMOST spectra for the W UMa binaries UV Lyn, V781 Tau, NSVS 4484038, and 2MASS J15471055+5302107. The orbital and starspot parameters are... -
Ages & [Fe/H] of the MW bulge using APOGEE
We present stellar age distributions of the Milky Way bulge region using ages for ~6000 high-luminosity (log(g)<2.0), metal-rich ([Fe/H]>=-0.5) bulge stars observed by the... -
New M87 GCs metallicities from Keck & MMT sp.
We present an extensive study of spectroscopically derived chemical abundances for M87 and its globular cluster (GC) system. Using observations from the Mitchell spectrograph at... -
Abundances and ages of stars in the Milky Way bulge
The age and chemical characteristics of the Galactic bulge link to the formation and evolutionary history of the Galaxy. Data-driven methods and large surveys enable stellar... -
Stellar parameters from the 1st release of the MaSTar
We report the stellar atmospheric parameters for 7503 spectra contained in the first release of the Mapping Nearby Galaxies at Apache Point Observatory survey (MaNGA) stellar... -
Fe/H & radii from blended sp. of simulated binaries
In this work, we quantify the effect of an unresolved companion star on the derived stellar parameters of the primary star if a blended spectrum is fit assuming the star is... -
Solar analog rotations from Kepler & Gaia
A major obstacle to interpreting the rotation period distribution for main-sequence stars from Kepler mission data has been the lack of a precise evolutionary status for these... -
Oscillations in red giants from TESS data
Since the onset of the "space revolution" of high-precision high-cadence photometry, asteroseismology has been demonstrated as a powerful tool for informing Galactic archeology... -
Spectra of 28 stars in Price-Whelan 1 association
We report spectroscopic measurements of stars in the recently discovered young stellar association Price-Whelan 1 (PW1), which was found in the vicinity of the Leading Arm (LA)... -
Dwarfs or giants? Stellar metallicities & distances
We present a new fully data-driven algorithm that uses photometric data from the Canada-France Imaging Survey (CFIS; u), Pan-STARRS 1 (PS1; griz), and Gaia (G) to discriminate... -
Spectroscopy & HST photometry of galaxy Leo V
The ultra-faint dwarf galaxy Leo V has shown both photometric overdensities and kinematic members at large radii, along with a tentative kinematic gradient, suggesting that it... -
Evolu. star mass-metallicity relation. II.
We present the stellar mass-[Fe/H] and mass-[Mg/H] relation of quiescent galaxies in two galaxy clusters at z~0.39 and z~0.54. We derive the age, [Fe/H], and [Mg/Fe] for each... -
Magellan/IMACS spectra of Crater II & Hercules
We investigate the possibility that the dwarf galaxies Crater II and Hercules have previously been tidally stripped by the Milky Way. We present Magellan/IMACS spectra of...