101 citations · 1.2k across the 52 of their papers we have counts for
23 papers · 1 filter
CO abundances in a protostellar cloud: freeze-out and desorption in the envelope and outflow of L483
P. B. Carolan, M. P. Redman, E. Keto +1
CO isotopes are able to probe the different components in protostellar clouds. These components, core, envelope and outflow have distinct physical conditions and sometimes more tha…
VLT / Infrared Integral Field Spectrometer Observations of Molecular Hydrogen Lines in the Knots in the Planetary Nebula NGC 7293 (the Helix Nebula)
M. Matsuura, A. K. Speck, M. D. Smith +6
Knots are commonly found in nearby planetary nebulae (PNe) and star forming regions. Within PNe, knots are often found to be associated with the brightest parts of the nebulae and…
A search for CO+ in planetary nebulae
T. A. Bell, W. Whyatt, S. Viti +1
We have carried out a systematic search for the molecular ion CO+ in a sample of 8 protoplanetary and planetary nebulae in order to determine the origin of the unexpectedly strong…
Deep optical observations of the interaction of the SS 433 microquasar jet with the W 50 radio continuum shell
P. Boumis, J. Meaburn, J. Alikakos +6
Four mosaics of deep, continuum-subtracted, CCD images have been obtained over the extensive galactic radio continuum shell, W 50, which surrounds the remarkable stellar system SS…
A deep mosaic of [O III] 5007 A CCD images of the environment of the LBV star P Cygni
P. Boumis, J. Meaburn, M. P. Redman +1
A mosaic of six, deep, CCD images in the light of the [O III] 5007 A nebular emission line has been obtained with the 1.3-m Skinakas (Crete) telescope of the filamentary nebulosity…
Oscillations in the stable starless core Barnard 68
M. P. Redman, E. Keto, J. M. C. Rawlings
New molecular line observations of the Bok globule Barnard 68 in HCO+ irrefutably confirm the complex pattern of red and blue asymmetric line profiles seen across the face of the c…
Deep optical observations of the supernova remnants G 126.2+1.6, G 59.8+1.2 and G 54.4-0.3
P. Boumis, F. Mavromatakis, E. M. Xilouris +3
Optical CCD imaging and spectroscopic observations of three supernova remnants are presented. Optical emission from G 54.4-0.3 and G 59.8+1.2 is detected for the first time, while…
The kinematics of the large western knot in the halo of the young planetary nebula NGC 6543
Deborah L. Mitchell, M. Bryce, J. Meaburn +5
A detailed analysis is presented of the dominant ionised knot in the halo of the planetary nebula NGC 6543. Observations were made at high spectral and spatial resolution of the [O…
The creation of the Helix planetary nebula (NGC 7293) by multiple events
J. Meaburn, P. Boumis, J. A. Lopez +4
A deep, continuum-subtracted, image of NGC 7293 has been obtained in the light of the Halpha+[N II] emission lines. New images of two filamentary halo stuctures have been obtained…
Rotation of the pre-stellar core L1689B
M. P. Redman, E. Keto, J. M. C. Rawlings +1
The search for the onset of star formation in pre-stellar cores has focussed on the identification of an infall signature in the molecular line profiles of tracer species. The clas…
The kinematics of the bi-lobal supernova remnant G 65.3+5.7 - Paper II
P. Boumis, J. Meaburn, J. A. Lopez +4
Further deep, narrow-band images in the light of [O III] 5007 A have been added to the previous mosaic of the faint galactic supernova remnant G 65.3+5.7. Additionally longslit spa…
Candidates for giant lobes projecting from the LBV stars P Cygni and R 143
J. Meaburn, P. Boumis, M. P. Redman +2
Deep, wide-field, continuum-subtracted, images in the light of the Halpha+[NII] 6548 & 6584 A and [O III] 5007 A nebular emission lines have been obtained of the environment of the…
The Sensitivity of Infall Molecular Line Profiles to the Ambient Radiation Field
M. P. Redman, J. M. C. Rawlings, J. A. Yates +1
In cold molecular clouds submillimetre emission lines are excited by the ambient radiation field. The pumping is dominated by the cosmic microwave background (CMB). It is usual in…
The HCO+ emission excess in bipolar outflows
J. M. C Rawlings, M. P. Redman, E. Keto +1
A plausible model is proposed for the enhancement of the abundance of molecular species in bipolar outflow sources. In this model, levels of HCO+ enhancement are considered based o…
High speed outflows driven by the 30 Doradus starburst
M. P. Redman, Z. A. Al-Mostafa, J. Meaburn +1
Echelle spectroscopy has been carried out towards a sample region of the halo of the giant HII region 30 Doradus in the Large Magellanic Cloud. This new kinematical data is the amo…
Chemistry and clumpiness in planetary nebulae
M. P. Redman, S. Viti, P. Cau +1
We study the chemistry in the slow wind during the transition from AGB star to pre-planetary nebula (PPN) and planetary nebula (PN). We show that there is a very rich chemistry of…
Molecular gas freeze-out in the pre-stellar core L1689B
M. P. Redman, J. M. C. Rawlings, D. J. Nutter +2
C17O (J=2-1) observations have been carried out towards the pre-stellar core L1689B. By comparing the relative strengths of the hyperfine components of this line, the emission is s…
Kinematics of the Pencil Nebula (RCW 37) and its association with the young Vela supernova remnant RX J0852.0-4622
M. P. Redman, J. Meaburn, M. Bryce +2
The association between the Pencil nebula (RCW 37, NGC 2736), the Vela X-ray fragment D/D' and the recently discovered new X-ray supernova remnant (RX J0852.0-4622) in Vela is inve…
Two jets from the Orion (M42) `proplyds' - kinematics, morphologies and origins
J. Meaburn, M. F. Graham, M. P. Redman
A spatially unresolved velocity feature, with an approaching radial velocity of ~100 km/s with respect to the systemic radial velocity, in a position-velocity array of [O III] 5007…
The origin of the strings in the outer regions of Eta Carinae
M. P. Redman, J. Meaburn, A. J. Holloway
The narrow optical filaments (`strings' or `spikes') emerging from the Homunculus of Eta Carinae are modelled as resulting from the passage of ballistic `bullets' of material throu…
Deep Halpha imagery of the Eridanus shells
P. Boumis, C. Dickinson, J. Meaburn +5
A deep \ha image of interlocking filamentary arcs of nebulosity has been obtained with a wide-field ( 30\degree diameter) narrow-band filter camera combined with a CCD as…
Clumpy ultracompact HII regions -- II. Cores, spheres and shells from subsonic flows
M. P. Redman, R. J. R. Williams, J. E. Dyson
We have modelled ultracompact HII regions (UCHIIR) in terms of steady subsonic ionized flows in a clumpy medium. Mass loss from neutral clumps allows the regions to be long-lived.…
Clumpy Ultracompact HII Regions I: Fully Supersonic Wind-blown Models
J. E. Dyson, R. J. R. Williams, M. P. Redman
We propose that a significant fraction of the ultracompact HII regions found in massive star-forming clouds are the result of the interaction of the wind and ionizing radiation fro…