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Chapter and Conference Paper
The Afterglow of the Gamma-Ray Burst 050502a: First Case of an Early (<1hr) Multi–Colour Detection
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Chapter and Conference Paper
Map** the Stellar Dynamics of M31
Using the Planetary Nebula Spectrograph, we have observed and measured the velocities for 2764 PNe in the disk and halo of the Andromeda galaxy. Preliminary analysis using a basic ring model shows a rotation c...
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Chapter and Conference Paper
Map** the Stellar Dynamics of M31
Using the Planetary Nebula Spectrograph, we have observed and measured the velocities for 2764 PNe in the disk and halo of the Andromeda galaxy. Preliminary analysis using a basic ring model shows a rotation c...
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Chapter and Conference Paper
Shells, Ripples and Tails
It has been known since the early simulations of Wright (1972), and Toomre & Toomre (1972), that interactions between galaxies can give rise to quite spectacular morphological features, including spiral struct...
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Chapter and Conference Paper
Shell Formation in Ngc 474
We present broad band photometry (B and R) of the classic shell galaxy NGC 474. Preliminary results indicate that the shells have a similar colour to and follow the same trend of colour with radius as the unde...
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Chapter and Conference Paper
Peculiar Kinematics in the Core of NGC 474
We present absorption line profile analysis of NGC 474, an elliptical with prominent, irregular shells. Profiles are parameterized with Gauss-Hermite polynomials (van der Marel & Franx ApJ 407 1993; Rix & Whit...
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Chapter and Conference Paper
0422-476: A Shell Galaxy with Non-Aligned Shells
0422-476, a nearly face-on S0-a galaxy, is the best example in the Malin/Carter (1983) catalogue of a shell system with shells distributed randomly “all-round” the galaxy. The shells are so bright ...
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Chapter and Conference Paper
An optical and radio survey of southern radio galaxies
We present results from a subset of our survey of southern elliptical radio galaxies. Using VLA snapshot data and high sensitivity spectra from tile AAT Faint Object Red Spectrograph we find a strong correlati...
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Chapter and Conference Paper
Two Colour CCD Photometry of Malin-Carter Shell Galaxies
Shells may be the result of the disruption of a small companion in the potential of a much larger galaxy (e.g., Hernquist & Quinn, 1986; Dupraz & Combes, 1985), the disturbance of a disk system in a tidal enco...
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Chapter and Conference Paper
Galaxy photometry at faint light levels — interaction with the environment
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Chapter and Conference Paper
Elliptical Galaxies with Shells
A considerable number of otherwise normal elliptical galaxies show sharp edged, low surface brightness concentric features, often at very large radii from the parent galaxy. Features like this are visible in s...