Search Publications
An unusual high-redshift object discovered with the Hubble Space Telescope : peculiar starburst galaxy or new gravitational lens?
Glazebrook, K.; Griffiths, R.; Ellis, R. +2 more
We report the discovery of an object with a very peculiar structure, using observations from the refurbished Hubble Space Telescope (HST) as part of the Medium-Deep Survey project. The object includes four compact blue components arranged around an extended red component, with mutual separations of <1 arcsec. Using a ground-based spectrum as an…
3 Puppis : a peculiar object with infrared excess.
Rovero, Adrian C.; Ringuelet, Adela E.
We present a model that accounts for the UV, photographic, and IR observations of 3 Puppis. The model consists of a binary system in which the primary is an A supergiant with a mild chromosphere; the primary fills its Roche lobe. The velocity law in the extended atmosphere, which is responsible for the density distribution of the gas, and a chromo…
Optical and UV spectroscopy towards stars in the direction of the Cohen high-velocity H I stream.
Dufton, P. L.; Keenan, F. P.; Bates, B. +2 more
We present high-resolution, high signal-to-noise ratio optical spectra and UV spectra obtained with lUE for several stars that lie within and adjacent to the Cohen high- velocity (Hv) stream, which is considered by Cohen to lie within 300 pc. From spectral classifications, published photometry and LTE model atmosphere analysis of our stellar spect…
A non-thermal radio/optical/X-ray source in PKS 2316-423.
Fabian, A. C.; Crawford, C. S.
We report observations of PKS 2316-423 in the ultraviolet and with the ROSAT HRI, where it appears as a bright point source. Optical spectroscopy reveals weak emission lines and a strong, excess blue continuum that is centrally concentrated. The combined optical- ultraviolet continuum spectrum cannot be fitted by any simple combination of a main-s…
Pulsational Activity on Ik-Pegasi
Kellett, B. J.; Lloyd, C.; Smalley, B. +1 more
High-time-resolution photometry of millimagnitude precision using the Fine Error Sensor on board the International Ultraviolet Explorer is presented. A few hours of data, when subjected to an optimal (Bayesian) analysis, reveal two pulsational frequencies in the star 1K Peg A, one of which was not previously known. A fit to the empirical P-L-C rel…
The Latest Spectral Peregrinations of Rx-Puppis
Ivison, R. J.; Seaquist, E. R.
We present centimetre- and millimetre-wave continuum measurements of the symbiotic binary system RX Puppis. These suggest that RX Pup has returned to a state of low excitation after more than a decade of activity. Although the overall optical brightness has not altered substantially during the past two years, recent low-resolution ultraviolet and …