SIMBAD references

2020ApJ...894...75L - Astrophys. J., 894, 75-75 (2020/May-1)

The nature of ultra-diffuse galaxies in distant massive galaxy clusters: A370 in the Hubble Frontier Fields.


Abstract (from CDS):

We report the discovery of ultra-diffuse galaxies (UDGs) in Abell 370 (A370; z = 0.375). We find 46 UDGs in A370 from the images of the Hubble Frontier Fields. Most UDGs are low-luminosity red sequence galaxies, while a few of them are blue UDGs. We estimate the abundance of UDGs in A370, N(UDG) = 644 ± 104. Combining these results with those of Abell S1063 (z = 0.348) and Abell 2744 (z = 0.308), we derive a mean radial number density profile of UDGs in the three clusters. The number density profiles of UDGs and bright galaxies show a discrepancy in the central region of the clusters: the profile of UDGs shows a flattening as clustercentric distance decreases, while that of bright galaxies shows a continuous increase. This implies that UDGs are prone to disruption in the central region of the clusters. The relation between the abundance of UDGs and virial masses of their host systems is described by a power law with an index of nearly one: N(UDG)∝M200^0.99±0.05^ for M200 > 1013 M. We estimate approximately dynamical masses of UDGs using the fundamental manifold method and find that most UDGs have dwarf-like masses (M200 < 1011M). This implies that most UDGs have a dwarf-like origin and a small number of them could be failed L* galaxies. These results suggest that multiple origins may contribute to the formation and evolution of UDGs in massive galaxy clusters.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Low surface brightness galaxies - Dwarf galaxies - Galaxy clusters

VizieR on-line data: <Available at CDS (J/ApJ/894/75): table4.dat table5.dat>

Nomenclature: Table 4: [LKL2020] A370 UDG-CNN (Nos C01-C34), [LKL2020] A370 UDG-PNN (Nos P01-P12). Table 5: [LKL2020] A370 LDw-CNN (Nos C01-C80), [LKL2020] A370 LDw-PNN (Nos P01-P32).

Status at CDS : Tables of objects will be appraised for possible ingestion in SIMBAD.

Simbad objects: 58

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2020ApJ...894...75L and select 'bookmark this link' or equivalent in the popup menu


© Université de Strasbourg/CNRS

    • Contact