81 citations · 232 across the 7 of their papers we have counts for
7 papers
To Grow Old and Peculiar: A Survey of Anomalous Variable Stars in M80 and Age Determination using K2 and Gaia
László Molnár, Emese Plachy, Attila Bódi +11
The globular cluster Messier 80 was monitored by the Kepler space telescope for 80 days during the K2 mission. Continuous, high-precision photometry of such an old, compact cluster…
Spectroscopy of LMC Cluster Stars
Andrea K. Dupree, Christian I. Johnson, Mario Mateo +1
High resolution spectra of stars in the ~200 Myr LMC globular cluster, NGC 1866, reveal rapidly rotating stars with variable H-alpha emission and absorption, and signatures of outf…
NGC 1866: First Spectroscopic Detection of Fast Rotating Stars in a Young LMC Cluster
A. K. Dupree, A. Dotter, C. I. Johnson +6
High-resolution spectroscopic observations were taken of 29 extended main sequence turn-off (eMSTO) stars in the young (200 Myr) LMC cluster, NGC 1866 using the Michigan/Mage…
A comparative study of two 47 Tuc giant stars with different s-process enrichment
M. J. Cordero, C. J. Hansen, C. I. Johnson +1
Here we aim to understand the origin of 47 Tuc's La-rich star Lee 4710. We report abundances for O, Na, Mg, Al, Si, Ca, Sc, Ti, V, Cr, Co, Ni, Zn, Y, Zr, Ba, La, Ce, Pr, Nd, and Eu…
A high-velocity bulge RR Lyrae variable on a halo-like orbit
Andrea Kunder, R. Michael Rich, Keith Hawkins +21
We report on the RR Lyrae variable star, MACHO 176.18833.411, located toward the Galactic bulge and observed within the data from the ongoing Bulge RR Lyrae Radial Velocity Assay (…
A study of rotating globular clusters - the case of the old, metal-poor globular cluster NGC 4372
N. Kacharov, P. Bianchini, A. Koch +7
Aims: We present the first in-depth study of the kinematic properties and derive the structural parameters of NGC 4372 based on the fit of a Plummer profile and a rotating, physica…
The Unique Na:O Abundance Distribution in NGC 6791: The First Open(?) Cluster with Multiple Populations
D. Geisler, S. Villanova, G. Carraro +4
Almost all globular clusters investigated exhibit a spread in their light element abundances, the most studied being a Na:O anticorrelation. In contrast, open clusters show a homog…