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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)
The Fornax Spectroscopic Survey will use the Two degree Field spectrograph (2dF) of the Anglo-Australian Telescope to obtain spectra for a complete sample of all 14000 objects with 16.5 ≤ b j ≤ 19.7 in a 12 square degree area centred on the Fornax Cluster. The aims of this project include the study of dwarf galaxies in the cluster (both known low surface(More)
By utilizing the large multiplexing advantage of the Two-degree Field spectrograph on the Anglo-Australian 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(More)
This report has not been formally peer reviewed. The opinions expressed here reflect those of the authors, and not necessarily those of their home institutions or supporting organizations. Abstract This analytical report is the outcome of a restudy that was undertaken in January 2005 of an original study undertaken in 1993 of the impact of HIV/AIDS on(More)