Search Publications
The infrared jet in 3C 66B
Hardcastle, M. J.; Birkinshaw, M.; Worrall, D. M. +1 more
We present images of infrared (IR) emission from the radio jet in 3C 66B. Data at three wavelengths (4.5, 6.75 and 14.5µm) were obtained using the Infrared Space Observatory. The 6.75-µm image clearly shows an extension aligned with the radio structure. The jet was also detected in the 14.5-µm image, but not at 4.5µm. The r…
Episodic absorption in the outflow of the old nova V603 Aquilae
Ringwald, F. A.; Prinja, Raman K.; Knigge, Christian +1 more
We report on the time-dependent behaviour of ultraviolet spectral lines in Hubble Space Telescope Goddard High-Resolution Spectrograph data of the classical nova V603 Aql. In particular, episodic blueshifted absorption (extending to ~-2500kms-1) is present, with a variability time-scale down to ~1min. The data provide a rare opportunity…
X-ray analysis of the cluster 3C 129
Leahy, D. A.; Yin, D.
The cluster 3C 129 is classified as a rich cluster. An analysis of the properties of the cluster 3C 129 from ROSAT PSPC and HRI, Einstein IPC, and EXOSAT ME observations is presented. The mean temperature from a joint fit of the ROSAT PSPC and EXOSAT ME data is 5.5(+/-0.2)keV. The luminosity is 0.6x1044ergs-1 in 0.2-2.4keV an…
Composite spectraPaper 10: the equal-mass binary HR 2030 (K0IIb+B8IV)
Griffin, R. E. M.; Griffin, R. F.
We separate the spectra of the individual components of HR 2030, a sixth-magnitude composite-spectrum binary system, and show that they have types close to K0IIb and B8IV, and masses that are equal to within the precision of the measurements (mass ratio=1.00+/-0.03). The orbit appears to have a very small eccentricity, although reasons are given f…
The discovery of photospheric nickel in the hot DO white dwarf REJ 0503-289
Werner, K.; Dreizler, S.; Barstow, M. A. +4 more
We present the first evidence for the direct detection of nickel in the photosphere of the hot DO white dwarf REJ 0503-289. While this element has been seen previously in the atmospheres of hot H-rich white dwarfs, this is one of the first similar discoveries in a He-rich object. Intriguingly, iron, which is observed to be more abundant than Ni in…
Lyα imaging of a very luminous z=2.3 starburst galaxy with WFPC2
Roche, Nathan; Lowenthal, James; Woodgate, Bruce
We investigate the Lyα and UV continuum morphology of one of the most luminous known Lymanα emitting galaxies (the `Coup Fourré Galaxy'), associated with a z=2.3 damped Lyα absorption system in the spectrum of the QSO PHL 957. The galaxy is observed with the Hubble Space Telescope Wide-Field Planetary Camera 2 (HST WFPC2), through a narrow filter …
Hubble Space Telescope imaging survey of sub-mJy star-forming galaxies - I. Morphologies at z~0.2
Mobasher, Bahram; Serjeant, Stephen; Oliver, Seb +1 more
We present the first results of our Hubble Space Telescope HST WFPC2 F814W snapshot imaging survey, targeting virtually all sub-mJy decimetric radio-selected star-forming galaxies. The radio selection at ~1GHz is free from extinction effects and the radio luminosities are largely unaffected by AGN contamination, making these galaxies ideal tracers…
UV spectroscopy of the peculiar binary V Sagittae in a low state
Wood, Janet H.; Lockley, J. J.
In this paper we present the first phase-resolved, high-resolution, UV spectroscopy of V Sge. HST GHRS observations were obtained covering 1.5 orbital cycles of V Sge in a low state. We covered the Heii 1640 line and the Civ 1550 doublet alternately, and also obtained one spectrum covering Mgii 2800. We create continuum and line flux light curves …
Interstellar CO towards X Persei (HD 24534) - II. Two-component model
Kaczmarczyk, Grzegorz
The observations made by the Goddard High Resolution Spectrograph (GHRS) aboard the Hubble Space Telescope (HST) of molecular CO in absorbing gas towards X Persei are reported. The two-component statistical equilibrium model incorporating radiative excitation of CO by line emission at the same velocity that originates in nearby molecular clouds ha…
Morphological number counts and redshift distributions to I=25 from the Hubble Deep Fields: constraints on cosmological models from early-type galaxies
Couch, Warrick J.; Phillipps, S.; Driver, S. P. +5 more
We combine magnitude and photometric redshift data on galaxies in the Hubble Deep Fields with morphological classifications in order to separate out the distributions for early-type galaxies. The updated morphological galaxy number counts down to I=25 and the corresponding redshift distributions are used as joint constraints on cosmological models…