128 citations · 524 across the 23 of their papers we have counts for
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Optical and near-infrared pulsation properties of RR Lyrae and Population II Cepheid variables in the Messier 15 globular cluster
Anupam Bhardwaj, Marina Rejkuba, G. C. Sloan +2
Messier 15 (NGC 7078) is an old and metal-poor post core-collapse globular cluster which hosts a rich population of variable stars. We report new optical () and near-infrared (…
RR Lyrae variables in Messier 53: Near-infrared Period--Luminosity relations and the calibration using Gaia Early Data Release 3
Anupam Bhardwaj, Marina Rejkuba, Richard de Grijs +6
We present new near-infrared, , Period--Luminosity relations (PLRs) for RR Lyrae variables in the Messier 53 (M53 or NGC 5024) globular cluster. Multi-epoch observat…
The RR Lyrae Variable Population in the Phoenix Dwarf Galaxy
Antonio J. Ordoñez, Soung-Chul Yang, Ata Sarajedini
We present the first detailed study of the RR Lyrae variable population in the Local Group dSph/dIrr transition galaxy, Phoenix, using previously obtained HST/WFPC2 observations of…
WIYN Open Cluster Study : Wide-Field CCD Photometry of the Old Open Cluster NGC 6819
Soung-Chul Yang, Ata Sarajedini, Constantine P. Deliyannis +3
We present a comprehensive photometric study of the old open cluster, NGC 6819 using 1x1 degree field VI MOSAIC CCD imaging taken with the WIYN 0.9m telescope. The resultant color-…
RR Lyrae Variables in the Halo of M33
Ata Sarajedini, S. -C. Yang
The properties of RR Lyrae variables make them excellent probes of the formation and evolution of a stellar population. The mere presence of such stars necessitates an age greater…
RR Lyrae Variables in the Local Group Dwarf Galaxy NGC 147
Soung-Chul Yang, Ata Sarajedini
We investigate the RR Lyrae population in NGC 147, a dwarf satellite galaxy of M31 (Andromeda). We used both Thuan-Gunn g-band ground-based photometry from the literature and Hubbl…