Using a complete spectroscopic survey to find red quasars and test the KX method (2008)
Jurek, Russell J., Drinkwater, Michael J., Francis, Paul J., Pimbblet, Kevin A.
We present an investigation of quasar colour–redshift parameter space in order to search for radio-quiet red quasars and to test the ability of a variant of the KX quasar selection method to detect...
Paul J Francis, Matthew T. Whiting, Rachel L. Webster
We present quasi-simultaneous multi-colour optical/near-IR photometry for 157 radio selected quasars, forming an unbiassed sub-sample of the Parkes Flat-Spectrum Sample. Data are also presented for...
Galaxy Clusters and Large Scale Structure at High Redshifts (2007)
Paul J. Francis, Bruce E. Woodgate, Anthony C. Danks
. We present a detailed study of a rich galaxy cluster at z=2.38. We demonstrate that this cluster contains large overdensities of damped Lyff absorption lines, of Lyff emitting galaxies and of...
B. K. Gibson, T. S. Axelrod, An Anomalous, Halo Star, ...
. We report the discovery of an extremely unusual halo star: SF2139. A spectrum of this star was obtained during a search for possible low-mass thick-disk stars. SF2139 is a red giant star, situated...
On the Nature of Red Galaxies in the Early Universe (2007)
Paul Francis Bruce, Paul J. Francis, Paul J. Francis, Bruce E. Woodgate, Bruce E. Woodgate, Anthony C. Danks, ...
. Increasing numbers of extremely red galaxies are being found in the high redshift universe. We present accurate near-IR photometry and NICMOS imaging for one of these galaxies, and demonstrate that...
Paul Francis And, Paul J. Francis, J. Webster, Bruce A. Peterson, Michael J. Drinkwater, ...
. We find that nearly all radio-loud, flat spectrum quasars are obscured by a magnitude or more of dust. The dust is probably located in the quasar or its host galaxy. If radio-quiet QSOs have...
Greg Wilson Research, B. K. Gibson, T. S. Axelrod, Paul J. Francis, Greg M. Wilson, ...
. In the local universe, most QSO absorption-lines seem to arise from gas in extended 100 kpc halos around spiral galaxies. We present evidence that at high redshift, at least some absorption lines...
Neural Networks and the Classification of Active Galactic Nucleus Spectra (2007)
Daya Rawson Jeremy, Jeremy Bailey, Paul J. Francis
: The use of Artificial Neural Networks (ANNs) as a classifier of digital spectra is investigated. Using both simulated and real data, it is shown that neural networks can be trained to discriminate...
The Evolution Of Qso Spectra: (2007)
Evidence For Microlensing, Paul J. Francis, Anuradha Koratkar
. We find that the spectra of QSOs evolve: high redshift QSOs (z ? 1:5) have lower equivalent width emission lines than low redshift QSOs (z ! 0:5) with the same luminosities and radio properties. We...
Paul J. Francis, Paul J. Francis, Bruce E. Woodgate, Bruce E. Woodgate
. We have discovered a compact group of galaxies at redshift 2.38, probably representing a proto-elliptical galaxy in the act of bottom-up formation. The group is embedded in an extended (? 100 kpc...
The Continuum Slopes of Optically Selected QSOs (2007)
Paul Francis School, Paul J. Francis
: Quasi-simultaneous optical/near-IR photometry is presented for a sample of 37 luminous optically selected QSOs drawn from the Large Bright QSO Survey. Most of the QSOs have decreased in brightness...
Spectral Properties of Parkes Flat-spectrum Radio Sources (2007)
Michael J. Drinkwater, Paul J. Francis, Rachel L. Webster
. We have constructed composite spectra of a large sample of flat-spectrum radio sources. The spectra are all very similar over a wide range of radio and optical properties and are also similar to a...
The Use of Role-Playing Exercises in Teaching Undergraduate Astronomy and Physics (2007)
Paul Francis Aidan, Paul J. Francis
The use of role-playing exercises in teaching university astronomy and physics can enliven lectures, deepen student understanding and dramatically increase the level of classroom interaction. A...
Large Scale Structures at High Redshift (2007)
. The evidence for large-scale structure at high redshifts is reviewed. I conclude that massive Mpc scale galaxy clusters probably exist at z ? 2. The 2139\Gamma4430 galaxy cluster at redshift 2.38...
The Intermediate Line Region and the Baldwin Effect (2007)
M. S. Brotherton, Paul J. Francis
. Statistical investigations of samples of quasars have established that clusters of properties are correlated. The strongest trends among the ultraviolet emission-line properties are characterized...
Emitting High Redshift, Paul J. Francis, Bruce E. Woodgate, Anthony C. Danks
We have discovered two new high redshift (z = 2:38) galaxies, near the previously known z = 2:38 galaxy 2139\Gamma4434 B1 (Francis et al. 1996). All three galaxies are strong Lyff emitters, and have...
The Spectra of Dusty Quasars (2007)
Paul J. Francis, Rachel L. Webster, Frank J. Masci, Michael J. Drinkwater, Bruce A. Peterson
Flat radio spectrum quasars from the Parkes half Jansky survey show an enormous range of optical to near-IR colours. The spectra of these quasars suggest that this diversity is probably due to...
Stromlo Symposium, M. Arnaboldi, P. Saha, Paul J. Francis, Bruce E. Woodgate, ...
Abstract: We have discovered a rich cluster of remarkably red (R \Gamma K? 5) galaxies at redshift z = 2:38. The spectra and colours of the galaxies suggest that they are massive ( 10 11 solar...
Paul J. Francis, Anuradha Koratkar
We study the rest-frame UV spectra of two samples of QSOs, a low redshift (z 0:4) sample drawn from the IUE archives, and a high redshift (z 2:2) optically selected sample, the Large Bright QSO...
Using a complete spectroscopic survey to find red quasars and test the KX method (2007)
Jurek, Russell J., Drinkwater, Michael J., Francis, Paul J., Pimbblet, Kevin A.
We present an investigation of quasar colour-redshift parameter space in order to search for radio-quiet red quasars and to test the ability of a variant of the KX quasar selection method to detect...
Fluorescent Lyman-alpha Emission from Gas Near a QSO at Redshift 4.28 (2006)
Francis, Paul J., McDonnell, Sunsanee
We use integral field spectroscopy with the Gemini North Telescope to detect probable fluorescent Ly-alpha emission from gas lying close to the luminous QSO PSS 2155+1358 at redshift 4.28. The...
Whiting, Matthew T., Webster, Rachel L., Francis, Paul J.
The high-redshift radio-loud quasar PKS 2126-158 is found to have a large number of red galaxies in close apparent proximity. We use the Gemini Multi-Object Spectrograph (GMOS) on Gemini South to...
The Distribution of Ly-alpha-Emitting Galaxies at z=2.38: Paper 2, Spectroscopy (2004)
Francis, Paul J., Palunas, Povilas, Teplitz, Harry I., Williger, Gerard M., Woodgate, Bruce E.
In Paper 1 of this series we identified an 80 co-moving Mpc filament of candidate Lyman-alpha emitting galaxies at redshift 2.38. In this paper we present spectroscopy of the 37 galaxy candidates....
Francis, Paul J., Bland-Hawthorn, Joss
The intense UV radiation from a highly luminous QSO should excite fluorescent Ly-alpha emission from any nearby neutral hydrogen clouds. We present a very deep narrow-band search for such emission...
Low-Metallicity Gas Clouds in a Galaxy Proto-Cluster at Redshift 2.38 (2004)
Francis, Paul J., Williger, Gerard M.
We present high resolution spectroscopy of a QSO whose sight-line passes through the halo of a pair of elliptical galaxies at redshift 2.38. This pair of galaxies probably lies at the center of a...
The Distribution of Lya-Emitting Galaxies at z=2.3 (2003)
Palunas, Povilas, Teplitz, Harry I., Francis, Paul J., Williger, Gerard M., Woodgate, Bruce E.
We present the detection of 34 Ly-alpha emission-line galaxy candidates in a 80x80x60 co-moving Mpc region surrounding the known z=2.38 galaxy cluster J2143-4423. The space density of Ly-alpha...
An Unbiassed Census of Active Galactic Nuclei in the Two Micron All Sky Survey (2003)
Francis, Paul J, Nelson, Brant O., Cutri, Roc M.
(Abridged) We present an unbiassed near-IR selected AGN sample, covering 12.56 square degrees down to K ~ 15.5, selected from the Two Micron All Sky Survey (2MASS). Our only selection effect is a...
The Spectra of Red Quasars (2001)
Francis, Paul J., Drake, Catherine L., Whiting, Matthew T., Drinkwater, Michael J., Webster, Rachel L.
We measure the spectral properties of a representative sub-sample of 187 quasars, drawn from the Parkes Half-Jansky, Flat-radio-spectrum Sample (PHFS). Quasars with a wide range of rest-frame...
Red synchrotron jets in Parkes quasars (2001)
Whiting, Matthew T., Webster, Rachel L., Francis, Paul J.
We present model fits to spectral energy distributions in the optical and NIR of >100 flat-spectrum radio quasars from the Parkes Half-Jansky Flat-spectrum Sample. We find that approximately 40% of...
The spectra of red quasars (2001)
Francis, Paul J., Drake, Catherine L., Whiting, Matthew T., Drinkwater, Michael J., Webster, Rachel L.
We measure the spectral properties of a representative sub-sample of 187 quasars, drawn from the Parkes Half-Jansky, Flat-radio-spectrum Sample (PHFS). Quasars with a wide range of rest-frame...
The spectra of red quasars (2001)
Francis, Paul J., Drake, Catherine L., Whiting, Matthew T., Drinkwater, Michael J., Webster, Rachel L.
We measure the spectral properties of a representative sub-sample of 187 quasars, drawn from the Parkes Half-Jansky, Flat-radio-spectrum Sample (PHFS). Quasars with a wide range of rest-frame...
On the Gas Surrounding High Redshift Galaxy Clusters (2000)
Francis, Paul J., Wilson, Greg M., Woodgate, Bruce E.
Francis & Hewett (1993) identified two 10-Mpc scale regions of the high redshift universe that were seemingly very overdense in neutral hydrogen. Subsequent observations showed that at least one of...
Mortlock, Daniel J., Webster, Rachel L., Francis, Paul J.
Quasar pairs are either physically distinct binary quasars or the result of gravitational lensing. The majority of known pairs are in fact lenses, with a few confirmed as binaries, leaving a...
The Optical/Near-IR Colours of Red Quasars (1999)
Francis, Paul J., Whiting, Matthew T., Webster, Rachel L.
We present quasi-simultaneous multi-colour optical/near-IR photometry for 157 radio selected quasars, forming an unbiassed sub-sample of the Parkes Flat-Spectrum Sample. Data are also presented for...
Introduction to Principal Components Analysis (1999)
Francis, Paul J., Wills, Beverley J.
Understanding the inverse equivalent width - luminosity relationship (Baldwin Effect), the topic of this meeting, requires extracting information on continuum and emission line parameters from...
The Intermediate Line Region and the Baldwin Effect (1998)
Brotherton, M. S., Francis, Paul J.
Statistical investigations of samples of quasars have established that clusters of properties are correlated. The strongest trends among the ultraviolet emission-line properties are characterized by...
Host Galaxy Contribution to the Colours of `Red' Quasars (1998)
Masci, Frank J., Webster, Rachel L., Francis, Paul J.
We describe an algorithm that measures self-consistently the relative galaxy contribution in a sample of radio-quasars from their optical spectra alone. This is based on a spectral fitting method...
Galaxy Clusters and Large Scale Structure at High Redshifts (1998)
Francis, Paul J., Woodgate, Bruce E., Danks, Anthony C.
We present a detailed study of a rich galaxy cluster at z=2.38. We demonstrate that this cluster contains large overdensities of damped Ly-alpha absorption lines, of Ly-alpha emitting galaxies and of...
A Group of Red, Ly-alpha Emitting, High Redshift Galaxies (1997)
Francis, Paul J., Woodgate, Bruce E., Danks, Anthony C.
We have discovered two new high redshift (z=2.38) galaxies, near the previously known z=2.38 galaxy 2139-4434 B1 (Francis et al. 1996). All three galaxies are strong Ly-alpha emitters, and have much...
Neural Networks and the Classification of Active Galactic Nucleus Spectra (1996)
Rawson, Daya M., Bailey, Jeremy, Francis, Paul J.
The use of Artificial Neural Networks (ANNs) as a classifier of digital spectra is investigated. Using both simulated and real data, it is shown that neural networks can be trained to discriminate...
The Continuum Slopes of Optically Selected QSOs (1996)
Quasi-simultaneous optical/near-IR photometry is presented for a sample of 37 luminous optically selected QSOs drawn from the Large Bright QSO Survey. Most of the QSOs have decreased in brightness...
Thesis (M.A.) (Education)--Niagara University, 1968.