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OGLE Study of the Sagittarius Dwarf Spheroidal Galaxy and its M54 Globular Cluster
Soszyński, I.; Udalski, A.; Szymański, M. K. +9 more
We use the fundamental-mode RR Lyr-type variable stars (RRab) from OGLE-IV survey to draw a 3D picture of the central part of the tidally disrupted Sagittarius Dwarf Spheroidal (Sgr dSph) galaxy. We estimate the line-of-sight thickness of the Sgr dSph stream to be FWHMcen=2.42 kpc. Based on OGLE-IV observations collected in seasons 2011…
The Clusters AgeS Experiment (CASE). Variable stars in the field of the globular cluster NGC 362
Thompson, I. B.; Schwarzenberg-Czerny, A.; Rozyczka, M. +2 more
The field of the globular cluster NGC 362 was monitored between 1997 and 2015 in a search for variable stars. BV light curves were obtained for 151 periodic or likely periodic variable stars, over a hundred of which are new detections. Twelve newly detected variable stars are proper-motion members of the cluster: two SX Phe and two RR Lyr pulsator…