Galaxy Threshing and the Formation of Ultracompact Dwarf Galaxies
نویسندگان
چکیده
منابع مشابه
Galaxy threshing and the formation of ultra-compact dwarf galaxies
Recent spectroscopic and morphological observational studies of galaxies around NGC 1399 in the Fornax Cluster (Drinkwater et al. 2000b) have discovered several ‘ultra-compact dwarf’ galaxies with intrinsic sizes of ∼ 100 pc and absolute B band magnitudes ranging from −13 to −11 mag. In order to elucidate the origin of these enigmatic objects, we perform numerical simulations on the dynamical e...
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This paper investigates the possibility that ultra-compact dwarf (UCD) galaxies in the Fornax cluster are formed by the threshing of nucleated, early-type dwarf galaxies (hereafter dwarf galaxies). Similar to the results of Côté et al. for the Virgo cluster, we show that the Fornax cluster observations are consistent with a single population in which all dwarfs are nucleated, with a ratio of nu...
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A recent all-object spectroscopic survey centred on the Fornax cluster of galaxies, has discovered a population of sub-luminous and extremely compact members, called “ultra-compact dwarf” (UCD) galaxies. In order to clarify the origin of these objects, we have used self-consistent numerical simulations to study the dynamical evolution a nucleated dwarf galaxy would undergo if orbiting the cente...
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By utilizing the large multiplexing advantage of the Two-degree Field spectrograph on the AngloAustralian Telescope, we have been able to obtain a complete spectroscopic sample of all objects in a predeÐned magnitude range, regardless of morphology, in an area toward the center of 16.5\ b j \ 19.7, the Fornax Cluster of galaxies. Among the unresolved or marginally resolved targets, we have foun...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2001
ISSN: 0004-637X
DOI: 10.1086/320339