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A near-infrared census of the multi-component stellar structure of early-type dwarf galaxies in the Virgo cluster
J. Janz, E. Laurikainen, T. Lisker +12
The fraction of star-forming to quiescent dwarf galaxies varies from almost infinity in the field to zero in the centers of rich galaxy clusters. What is causing this pronounced mo…
The Next Generation Virgo Cluster Survey. IV. NGC 4216: A Bombarded Spiral in the Virgo Cluster
Sanjaya Paudel, Pierre-Alain Duc, Patrick Cote +16
We present an investigation into the origins of a series of interlaced narrow filamentary stellar structures, loops and plumes in the vicinity of the Virgo Cluster, edge-on spiral…
Nuclei of early-type dwarf galaxies: are they progenitors of UCDs?
S. Paudel, T. Lisker, J. Janz
To address the question of whether the so-called ultra compact dwarf galaxies (UCDs) are the remnant nuclei of destroyed early-type dwarf galaxies (dEs), we analyze the stellar pop…
Stellar populations of Virgo cluster early-type dwarf galaxies with and without discs: a dichotomy in age?
S. Paudel, T. Lisker, H. Kuntschner +2
[Abridged] Using VLT/FORS2 spectroscopy, we have studied the properties of the central stellar populations of a sample of 38 nucleated early-type dwarf (dE) galaxies in the Virgo C…
The First Generation of Virgo Cluster Dwarf Elliptical Galaxies?
T. Lisker, J. Janz, G. Hensler +7
In the light of the question whether most early-type dwarf (dE) galaxies in clusters formed through infall and transformation of late-type progenitors, we search for an imprint of…
Stellar populations of seven early-type dwarf galaxies and their nuclei
S. Paudel, T. Lisker
Dwarf galaxies are the numerically dominating population in the dense regions of the universe. Although they seem to be simple systems at first view, the stellar populations of dwa…