Search Publications
The star formation histories of elliptical galaxies across the Fundamental Plane
Dunlop, J. S.; Jimenez, Raul; Heavens, A. +3 more
We present the first results from a study designed to test whether, given high-quality spectrophotometry spanning the mid-ultraviolet-optical wavelength regime, it is possible to distinguish the metal content and star formation history of individual elliptical galaxies with sufficient accuracy to establish whether their formation history is linked…
OI line emission in cool stars: calculations using partial redistribution
Jordan, C.; Koncewicz, R.
Radiative transfer calculations have been performed for five cool stars: α Tau, β Gem, Procyon, ɛ Eri and the Sun, for the purpose of investigating the behaviour of the OI emission over a wide range of stellar types, and its dependence on coherent photon scattering. These stars span a range of spectral types from F5 IV-V to K5 III and surface grav…
UV and optical emission lines from the z ~ 2.6 radio galaxy 0828+193: spatially resolved measurements
Humphrey, A.; Iwamuro, F.; Villar-Martín, M. +3 more
We present an investigation into the spatial variation of the rest-frame ultraviolet (UV) and optical line and continuum emission along the radio axis of the z ~ 2.6 radio galaxy 0828+193, using long-slit spectra from the Keck II and Subaru telescopes. Line brightnesses, line ratios and electron temperatures are examined, and their relationship wi…
Theoretical planetary mass spectra - a prediction for COROT
Broeg, C.
The satellite COROT will search for close-in exoplanets around a few thousand stars using the transit search method. The COROT mission holds the promise of detecting numerous exoplanets. Together with radial velocity follow-up observations, the masses of the detected planets will be known.
We have devised a method for predicting the expected …A catalogue of absorption lines in eight Hubble Space Telescope/STIS E230M 1.0 < z < 1.7 quasar spectra
Misawa, T.; Charlton, J. C.; Masiero, J. R. +6 more
We have produced a catalogue of line identifications and equivalent width measurements for all absorption features in eight ultraviolet echelle quasar spectra. These spectra were selected as having the highest signal-to-noise ratio among the Hubble Space Telescope/STIS spectra obtained with the E230M grating. We identify 56 metal-line systems towa…
The double-lined spectroscopic binary HR 6046
Griffin, R. E. M.; Scarfe, C. D.; Griffin, R. F.
HR 6046 has long been known as a single-lined binary system, for which preliminary orbital solutions were given in the 1930s, but the nature of the secondary star in the system has to date appeared puzzling. The rather large masses which the component stars were once believed to possess caused much speculation that the secondary was a `collapsed s…
Faint quasar candidates from Hubble Space Telescope imaging: number counts from 31 new high-latitude fields
Anderson, Scott F.; Beck-Winchatz, Bernhard
Quasars representative of the populous faint end of the luminosity function are dim with m ~ 24 at intermediate redshift, and traditional ground-based surveys for such faint quasars often suffer from severe contamination by compact faint galaxies. In order to limit the latter morphological contamination, we are conducting a combined multicolour an…
A spectroscopic search for non-radial pulsations in the δ Scuti star γ Bootis
Christensen-Dalsgaard, J.; Catanzaro, G.; Ventura, R. +2 more
High-resolution spectroscopic observations of the rapidly rotating δScuti star γBootis have been carried out in 2005, over six consecutive nights, in order to search for line-profile variability. Time-series, consisting of flux measurements at each wavelength bin across the TiII 4571.917 Å line profile as a function of time, have been Fourier anal…
Mass modelling with minimum kinematic information
Chakrabarty, Dalia
Mass modelling of early-type systems is a thorny issue; even for the few close by galaxies for which kinematic data are available, the implementation of this data can get embroiled in problems that are hard to overcome, unless more complete data sets are available. The mass-anisotropy degeneracy is a typical example of this. In this paper, we pres…
Detection of 6-cm radio-continuum emission from an EB (β-Lyrae type) variable star - HIP 68718
Filipović, M. D.; Anderson, M. W. B.
We report the 6-cm radio-continuum detection of a previously unknown radio star, HIP 68718, identified by the Hipparcos satellite as an EB or β-Lyrae type optical variable. Only five prior radio detections of this type are reported in the literature. The radio source (VLA J140402-002145) was detected at the 6σ level, with an associated <1arcsec…