-
Chapter and Conference Paper
Deep Optical Imaging of ESO 383–45: A Galaxy Undergoing Ram-pressure Strip**, or a Tidal Merger Remnant?
We present deep Schmidt plate and CCD images of ESO 383–45, an S0 galaxy in A3565 which possesses an extended halo and system of filaments. We discuss whether these structures may be formed by gravitational in...
-
Chapter and Conference Paper
BVRI Photometric Analysis for the Galaxy Group NGC 4410
The interacting group of galaxies NGC 4410 is a peculiar group of twelve galaxies with velocity in the range of 6900-7500 km s−1 [7] with four components in obvious interaction: NGC 4410 A-D (Fig. 1).
-
Chapter
Do Fast Winds Dominate the Dynamics of Planetary Nebulae?
A review of recent observations of the kinematics of six objects that represent the broad range of phenomena called planetary nebulae (PNe) is presented.
-
Article
Faint Features of Interacting Galaxies Revealed by the Digital Coaddition of 13 Tech-Pan Films of the Virgo Cluster
We have digitally coadded APM scans of 13 Kodak TechPan films of the SE region of the Virgo Cluster of galaxies. The ≈6.2°×6.2°field of the R-band films combined with the resolution of ≈2 arcsec pixel- results in...
-
Article
Truncated Collimated Flows in Abell 30, Abell 78 and the Honeycomb Nebula
Localised collimated flows of ionized gas are found in two hydrogen deficient planetary nebulae, Abell 30 and Abell 78 as well as in the Honeycomb complex of interlocking shells in halo of 30 Dor in the Large ...
-
Chapter and Conference Paper
The Global Motions of the Cometary Knots in the Helix Planetary Nebula (NGC 7293)
The nature and origin of the hundreds of ionized knots, with cometary tails, in the Helix planetary nebula are both being unravelled by recent observations. Healey and Huggins (1990, AJ, 100, 511), Meaburn et ...
-
Chapter and Conference Paper
The Kinematics of the Extensive Bipolar Lobes and Symmetric Knots of the Planetary Nebula KjPn 8 (PK 112-001)
Spatially resolved profiles of the Hα, and [NII] lines have been obtained with the Manchester echelle spectrometer combined with the 2.1 m San Pedro Märtir telescope over the bipolar lobes, the symmetric low i...
-
Chapter and Conference Paper
The Dramatic Kinematics of the Hydrogen Deficient Planetary Nebula Abell 30
The remarkable velocity structure of the different components of the hydrogen deficient planetary nebula Abell 30 have been revealed for the first time by obtaining spatially resolved profiles of the [O III] 5...
-
Article
Observational tests of the Interacting Winds Model of Planetary Nebulae
Numerical simulations of the evolution of Planetary Nebulae (PNe) based on the Interacting Stellar Winds models have become highly sophisticated, producing synthetic images and spectra in a number of prominent...
-
Article
Smoke rings around supernova 1987a
Detailed observations of the [Oiii]5007 Å emission from the elliptical rings around SN 1987A suggest a model wherein the two faint, outer rings are due to emission from two circular toroids moving outwards (at ≤ ...
-
Article
Circumstellar shocks
The presence of shocks in a wide variety of circumstellar phenomena will be illustrated and discussed.
-
Article
Circumstellar matter in the symbiotic binary CH cyg during its current outburst
We present optical high-resolution spectroscopy and UBV photometry of the symbiotic binary CH Cyg during the current outburst which began in 1992 February.
-
Chapter and Conference Paper
Circumstellar Matter in The Symbiotic Binary CH Cyg During its Current Outburst
We present optical high-resolution spectroscopy and UBV photometry of the symbiotic binary CH Cyg during the current outburst which began in 1992 February.
-
Chapter and Conference Paper
Smoke Rings Around Supernova 1987A
Detailed observations of the [O iii]5007 Å emission from the elliptical rings around SN 1987A suggest a model wherein the two faint, outer rings are due to emission from two circular toroids moving outwards (at ≤...
-
Chapter and Conference Paper
Circumstellar Shocks
The presence of shocks in a wide variety of circumstellar phenomena will be illustrated and discussed.
-
Article
Investigating the kinematics of the faint, giant haloes of Planetary Nebulae
Some interesting results from a current program of high resolution spectroscopy of the faint, giant haloes of Planetary Nebulae are presented. Observations of optical emission line profiles show that these hal...
-
Article
Recent optical observations of circumstellar and interstellar phenomena
Complex motions are found over the shells which comprise the Honeycomb nebula. Evidence is presented for an episodic jet from Eta Carinae. The compact globules with radial spokes in the Helix nebula have both ...
-
Article
High-speed flows in the vicinity of the Trapezium stars
[OIII] 5007 Å line profiles at high spectral and spatial resolution have been obtained at a single slit position near the Trapezium cluster in the Orion Nebula (M42, NGC1976) using the Manchester Echelle Spect...
-
Article
An evolutionary model for the wolf rayet nebula NGC 2539
The main outer ring of the WR nebula NGC 2539 expands radially with velocity ≈ 26kms−1. The dynamics are modelled as the interaction of the winds from the O progenitor and the present WR stage with clumpy molecul...
-
Chapter
An Evolutionary Model For the Wolf Rayet Nebula NGC 2539
The main outer ring of the WR nebula NGC 2539 expands radially with velocity ≈ 26kms-1. The dynamics are modelled as the interaction of the winds from the O progenitor and the present WR stage with clumpy molecul...
