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Chapter and Conference Paper
HST observations of the M 87 jet
We present highlights and preliminary results of our HST observing programs on the M 87 jet. We confirm previously known similarities between the radio and optical jets, but also describe a wealth of differenc...
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Chapter and Conference Paper
HST Imaging of 3CR Radio Galaxies: The Dust-Radio Connection
We used HST, WFPC-2 observations of 40 3CR radio galaxies that show evidence for the presence of dust in the nuclear regions to investigate the connection between the radio source and the dust. The data cover ...
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Chapter and Conference Paper
A Survey of the Interstellar Medium in Elliptical Galaxies: The Ionized Gas
We have carried out an extensive program of observations of the ionized gas in 74 luminous elliptical and lenticular galaxies, selected to include a variety of properties in radio and X-ray emission, and in ki...
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Chapter and Conference Paper
The Ionized Gas in Early-Type Galaxies
Optical surveys have shown that a large percentage of early-type galaxies contain extended dust lanes, patches or a central disk-like dust structure (Sadler & Gerhardt 1985; Sparks et al. 1985; Macchetto & Spa...
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Chapter and Conference Paper
Dust in Radio Galaxies: Clues to Activity
HST WFPC2 images of over two hundred 3CR extragalactic radio sources have been obtained. We have used these images to show the relationships between radio and optical jets and dust disks in unprecedented detai...
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Article
Interacting elliptical galaxies as hosts of intermediate-redshift quasars
QUASARS are the most luminous objects in the Universe. It has been speculated that they are the visible evidence for accretion of gas onto supermassive black holes that reside at the centres of host galaxies. ...
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Chapter
An Advanced Camera for the Hubble Space Telescope
This paper describes a proposal for a new camera for the HST, to be launched in 1999. It will offer an order of magnitude increase in performance compared with existing cameras.
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Article
A counterjet in the elliptical galaxy M87
JETS in radio galaxies have a variety of observed morphologies, in particular appearing in both one-sided and two-sided forms. It is not known whether jets can be intrinsically one-sided, or if the one-sided a...
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Chapter and Conference Paper
Nuclear Dust-Discs in Radio Ellipticals
As part of the ESO Key Program “Towards a Physical Classification of Galaxies”, Bender et al., NTT images using narrow-band and broad-band filters are being obtained. The exceptional seeing (0.7–1.0 arcsec) ha...
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Chapter and Conference Paper
Extended Hα Filaments in Elliptical Galaxies
We have undertaken a statistical observational study of elliptical galaxies with narrow band imaging, in order to investigate possible correlations between the presence of extended Hα filaments and the activit...
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Chapter and Conference Paper
The Warm Component of the ISM of Elliptical Galaxies
The characteristics of the optical emission-line gaseous component of elliptical galaxies are reviewed. We focus on three questions — the origin and fate of the gas and its excitation. The relative merits of a...
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Article
Blue stragglers in the core of the globular cluster 47 Tucanae
High-resolution observations of the core of the globular cluster 47 Tucanae with the Faint Object Camera on the Hubble Space Telescope reveal a high density of 'blue straggler' stars, occupying the upper end o...
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Chapter and Conference Paper
CCD Observations of Gas and Dust in NGC 4696: Implications for Cooling Flows?
NGC 4696 is a typical, nearby radio elliptical galaxy, occupying a central dominant location in the Centaurus cluster, and is a prime candidate for a galaxy hosting a cooling flow (Fabian et al. 1982, Canizares 1...
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Chapter
Spectral Variations of Theta Muscae (WC 6 + 0 9.5 I) in the Ultraviolet
High and low resolution spectra of the spectroscopic triple star θ Muscae were studied for time-variability. Within 7 min no variations were found in the low resolution data. On a time scale of 8 days and long...
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Chapter and Conference Paper
A Data Analysis Facility for the Faint Object Camera
The Faint Object Camera is the ESA instrument to be flown in the Space Telescope. A modern facility is being established to provide the software required to analyse the FOC data. This paper describes the basic...
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Chapter and Conference Paper
Ultraviolet Observations of the X-Ray Sources in the Eta Carinae Nebula
η Car is surrounded by a dense nebula ejected during the last 150 years. The Einstein satellite recently detected intense X-ray emission from η Car and its nebula indicating the existence of effici...
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Chapter
Radiative Wind Acceleration in Early Type Stars
The processes of radiative acceleration of stellar winds in OB stars by single and multiple photon scattering are considered. Single scattering can be the dominant accelerating process for stars later than B2 (Te...
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Article
IUE observations of X-ray sources: HD153919 (4U1700–37), HDE226868 (Cyg X-1), HZ Her (Her X-1)
The first UV spectroscopic measurements of binary X-ray sources with IUE show highly variable emission from a photoionised plasma in the object HZ Her, and give evidence for localised circumsystem material in ...
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Article
IUE observations of cool stars: α Aurigae, HR1099, λ Andromedae, and ε Eridani
Initial IUE observations of four cool stars are reported. Observed fluxes and surface fluxes are given for several UV emission lines in the spectral range 1,175–2,000 Å, obtained at low and high dispersion wit...
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Article
IUE observations of hot stars: HZ43, BD + 75°325, NGC6826, SS Cygni, η Carinae
During the commissioning phase of IUE observations were made of a selection of hot stars: the white dwarf HZ43, the hot subdwarf BD + 75°325, the nucleus of the planetary nebula NGC6826, the dwarf nova SS Cygn...
