Bibcode
Mancera Piña, Pavel E.; Aguerri, J. A. L.; Peletier, Reynier F.; Venhola, Aku; Trager, Scott; Choque Challapa, Nelvy
Bibliographical reference
Monthly Notices of the Royal Astronomical Society, Volume 485, Issue 1, p.1036-1052
Advertised on:
5
2019
Citations
60
Refereed citations
52
Description
We study the population of ultra-diffuse galaxies (UDGs) in a set of
eight nearby (z < 0.035) galaxy clusters, from the Kapteyn IAC WEAVE
INT Clusters Survey. We report the discovery of 442 UDG candidates in
our eight field of views, with 247 of these galaxies lying at projected
distances <1R200 from their host cluster. With the aim of
testing theories about their formation, we study the scaling relations
of UDGs comparing with different types of galaxies, finding that in the
full parameter space they behave as dwarf galaxies and their colours do
not seem to correlate with their effective radii. To investigate the
influence of the environment on the evolution of UDGs, we analyse their
structural properties as functions of the projected clustercentric
distance and the mass of their host cluster. We find no systematic
trends for the stellar mass nor effective radius as function of the
projected distance. However, the fraction of blue UDGs seem to be lower
towards the centre of clusters, and UDGs in the inner and outer regions
of clusters have different Sérsic index and axial ratio
distributions. Specifically, the axial ratio distributions of the outer
and inner UDGs resemble the axial ratio distributions of, respectively,
late-type dwarfs and dwarf ellipticals in the Fornax Cluster suggesting
an environmentally driven evolution and another link between UDGs and
dwarf galaxies. In general our results suggest strong similarities
between UDGs and smaller dwarf galaxies in their structural parameters
and their transformation within clusters.
Related projects
![The photograph is a combination of visible and near-infrared light, the immense cluster is a rich mix of galaxy shapes. The brightest and largest galaxies in the cluster are the yellow-white, massive, elliptical galaxies containing many hundreds of billions of stars each. Spiral galaxies — like our Milky Way — have younger populations of stars and are bluish. NASA, ESA, and J. Lotz and the HFF Team (STScI) Abell 370 is located approximately 4 billion light-years away in the constellation Cetus, the Sea Monster](/sites/default/files/styles/crop_square_2_2_to_320px/public/images/project/Imagen%20Jairo.png?itok=-47xHY8B)
Galaxy Evolution in Clusters of Galaxies
Galaxies in the universe can be located in different environments, some of them are isolated or in low density regions and they are usually called field galaxies. The others can be located in galaxy associations, going from loose groups to clusters or even superclusters of galaxies. One of the foremost challenges of the modern Astrophysics is to
Jairo
Méndez Abreu