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We describe a population of compact objects in the centre of the Fornax Cluster which were discovered as part of our 2dF Fornax Spectroscopic Survey. These objects have spectra typical of old stellar systems, but are unresolved on photographic sky survey plates. They have absolute magnitudes –13 < M B < –11, so they are 10 times more luminous than any(More)
Accepted —. Received —; in original form — ABSTRACT QSO absorption spectra provide an extremely useful probe of possible cosmological variation in various physical constants. Comparison of H i 21 cm absorption with corresponding molecular (rotational) absorption spectra allows us to constrain variation in y ≡ α 2 g p where α is the fine structure constant(More)
Recent detections of high-redshift absorption by both atomic hydrogen and molecular gas in the radio spectra of quasars have provided a powerful tool to measure possible temporal and spatial variations of physical 'constants' in the Universe. We have compared the frequency of high-redshift Hydrogen 21 cm absorption with that of associated molecular(More)
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(More)
The H i Parkes All Sky Survey (Hipass) is a blind extragalactic H i 21-cm emission line survey covering the whole southern sky from declination −90 • to +25 •. The Hipass catalogue (Hicat), containing 4315 H i-selected galaxies from the region south of decli-nation +2 • , is presented in Meyer et al. (2004a, Paper I). This paper describes in detail the(More)
The Hi Parkes All-Sky Survey (Hipass) Catalogue forms the largest uniform catalogue of Hi sources compiled to date, with 4,315 sources identified purely by their Hi content. The catalogue data comprise the southern region δ < +2 • of Hipass, the first blind Hi survey to cover the entire southern sky. RMS noise for this survey is 13 mJy beam −1 and the(More)