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Galaxy populations in the Hydra I cluster from the VEGAS survey I. Optical properties of a large sample of dwarf galaxies
Antonio La Marca, Reynier Peletier, Enrichetta Iodice +17
At ~50 Mpc, the Hydra I cluster of galaxies is among the closest cluster in the z=0 Universe, and an ideal environment to study dwarf galaxy properties in a cluster environment. We…
The Cen A galaxy group: dynamical mass and missing baryons
Oliver Müller, Federico Lelli, Benoit Famaey +5
The nearby elliptical galaxy Cen A is surrounded by a flattened system of dwarf satellite galaxies with coherent motions. Using a novel Bayesian approach, we measure the mean rotat…
The outermost stellar halo of NGC 5128 (Centaurus A): Radial structure
M. Rejkuba, W. E. Harris, L. Greggio +2
The extended stellar halos of galaxies contain important clues for investigating their assembly history and evolution. We investigate the resolved stellar content and the extended…
Extragalactic globular clusters with Euclid and other wide surveys
Ariane Lançon, S. Larsen, K. Voggel +14
Globular clusters play a role in many areas of astrophysics, ranging from stellar physics to cosmology. New ground-based optical surveys complemented by observations from space-bas…
Hidden in the Haystack: Low-luminosity globular clusters towards the Milky Way bulge
F. Gran, M. Zoccali, I. Saviane +8
Recent wide-area surveys have enabled us to study the Milky Way with unprecedented detail. Its inner regions, hidden behind dust and gas, have been partially unveiled with the arri…
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 (…