490 citations · 1.7k across the 24 of their papers we have counts for
24 papers
Hydrogen and Helium Shock Phenomena during Rising Light in RR Lyrae Fundamental Mode Pulsators
George W. Preston, Christopher Sneden, Merieme Chadid
We present measurements of H and He emission and absorption lines produced in RRab fundamental mode pulsators during primary light rise. The lines define universal progressions of…
The Axial Rotation and Variable Macroturbulence of RR Lyrae and Red Horizontal Branch Stars
George W. Preston, Christopher Sneden, Merieme Chadid +2
We have derived relations between full-width-half-maxima and equivalent widths of metallic absorption lines in the spectra of RR~Lyrae stars to estimate new upper limits on the axi…
Metal-Rich RRc stars in the Carnegie RR Lyrae Survey
Christopher Sneden, George W. Preston, Juna A. Kollmeier +6
We describe and employ a stacking procedure to investigate abundances derived from the low S/N spectra obtained in the Carnegie RR Lyrae Survey (CARRS; Kollmeier et al. 2013). We f…
Spectroscopic Comparison of Metal-Rich RRab Stars of the Galactic Field with Their Metal-Poor Counterparts
Merieme Chadid, Christopher Sneden, George W. Preston
We investigate atmospheric properties of 35 stable RRab stars that possess the full ranges of period, light amplitude, and metal abundance found in Galactic RR Lyrae stars. Our res…
Spiral structures and temperature distribution in the quiescent accretion disc of the cataclysmic binary V2051 Ophiuchi
Artur Rutkowski, Waclaw Waniak, George W. Preston +1
We present the capabilities of our new code for obtaining Doppler maps implementing the maximum likelihood approach. As test data, we used observations of the dwarf nova V2051 Ophi…
Metal-poor stars towards the Galactic bulge - a population potpourri
Andreas Koch, Andrew McWilliam, George W. Preston +1
We present a comprehensive chemical abundance analysis of five red giants and two horizontal branch (HB) stars towards the southern Galactic bulge, at (l,b)(0,-11$^…