SIMBAD references

2005ApJ...623L.105D - Astrophys. J., 623, L105-L108 (2005/April-3)

A comparison of surface brightness profiles for ultracompact dwarfs and dwarf elliptical nuclei: implications for the "Threshing" scenario.

DE PROPRIS R., PHILLIPPS S., DRINKWATER M.J., GREGG M.D., JONES J.B., EVSTIGNEEVA E. and BEKKI K.

Abstract (from CDS):

Using imaging from the Hubble Space Telescope, we derive surface brightness profiles for ultracompact dwarfs in the Fornax Cluster and for the nuclei of dwarf elliptical galaxies in the Virgo Cluster. Ultracompact dwarfs are more extended and have higher surface brightnesses than typical dwarf nuclei, while the luminosities, colors, and sizes of the nuclei are closer to those of Galactic globular clusters. This calls into question the production of ultracompact dwarfs via ``threshing'', whereby the lower surface brightness envelope of a dwarf elliptical galaxy is removed by tidal processes, leaving behind a bare nucleus. Threshing may still be a viable model if the relatively bright Fornax ultracompact dwarfs considered here are descended from dwarf elliptical galaxies whose nuclei are at the upper end of their luminosity and size distributions.

Abstract Copyright:

Journal keyword(s): Galaxies: Dwarf - Galaxies: Star Clusters - Galaxies: Structure

Simbad objects: 26

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2005ApJ...623L.105D and select 'bookmark this link' or equivalent in the popup menu


2021.04.12-06:30:36

© Université de Strasbourg/CNRS

    • Contact