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Dwarf elliptical galaxies in Centaurus A group: stellar populations in AM 1339-445 and AM 1343-452
M. Rejkuba, G. S. Da Costa, H. Jerjen +2
We study the red giant populations of two dE galaxies, AM 1339-445 and AM 1343-452, with the aim of investigating the number and luminosity of any upper asymptotic giant branch (AG…
Dynamical Mass Estimates for Two Luminous Star Clusters in Galactic Merger Remnants
N. Bastian, R. P. Saglia, P. Goudfrooij +4
We present high-dispersion spectra of two extremely massive star clusters in galactic merger remnants. One cluster, W30, is located in the ~500 Myr old merger remnant NGC 7252 and…
Hot subdwarfs in the Galactic Bulge
Giorgia Busso, Sabine Moehler, Manuela Zoccali +2
Recent observations and theories suggest that extreme horizontal branch (EHB) stars and their progeny should be the cause of the UV excess seen in the spectra of many elliptical ga…
Completing the Census of (Bright) Variable Stars in Galactic Globular Clusters
M. Catelan, H. A. Smith, B. J. Pritzl +15
We present a long-term project aimed at completing the census of (bright) variable stars in Galactic globular clusters. While our main aim is to obtain a reliable assessment of the…
On the Horizontal Branch of the Galactic Globular NGC2808
V. Castellani, G. Iannicola, G. Bono +3
We present new UV (F218W) data for stars in the central region of the Galactic globular cluster NGC2808, collected with the WFPC2 camera on board of the Hubble Space Telescope. The…