Search Publications
Spectroscopy of B Stars in the Small and Large Magellanic Clouds
Rolleston, W. R. J.
High-resolution spectroscopic observations of B-type stars in the Small (SMC) and Large (LMC) Magellanic Clouds have been obtained using the UCL echelle spectrograph at the Anglo-Australian Telescope. Preliminary results of an LTE model-atmosphere analysis are presented for three stars in the LMC, together with the results of a similar analysis of…
Effect of interstellar absorption on the MG II H & K profiles and fluxes of RS CVn stars
Doyle, J. G.; Houdebine, E. R.; Butler, C. J.
Tuned Solar and Stellar Oscillations?
Doyle, J. G.; Andrews, A. D.
Giant Starspots and Stellar Flares: The View from Space
Byrne, Patrick B.
Satellite observations of starspots and stellar flares are examined. The properties of sunspots and solar flares are reviewed and the method used to infer the existence of starspots is described. IUE observations of the atmospheres of spotted stars and Exosat X-ray observations of solar flares are discussed. Also, an IUE spectrum of II Peg and a U…
Empirical Constraints on the Outer Atmospheres of Late-Type Giant Stars with IUE
Judge, P. G.
Useful constraints on the outer atmospheric structure of late-type giant stars can be obtained using emission lines observed with the IUE satellite if all important processes in the atomic excitation calculations are included. Carpenter et al. (1985) did not include such effects, and therefore overestimated the geometric extent of the emission reg…
The Bright Pre-main Sequence Variable HR5999
Talavera, A.; Mewe, R.; Catala, C. +7 more
A meeting to review the reduced coordinated observations by EXOSAT, IUE and ground-based instruments of the bright and variable Herbig A7e star HR 5999 is summarized. The attempt was to delineate the relationship between the various observable quantities of its atmosphere (colors, emission-line fluxes, wind velocities, etc.) in order to develop a …
Optical and UV Observations of Spotted Stars
Byrne, P. B.
Extreme Helium Stars
Lynas-Gray, A. E.
Results of research into the nature of extreme helium stars are reviewed, covering published and unpublished work carried out over the past 20 years. Three approaches are being used to investigate the nature and evolution of extreme helium stars. Abundance analysis from model atmospheres provides information useful in interpreting the evolution of…
IUE Spectroscopy of Dwarf M Stars
Byrne, P. B.
Observations of Interstellar CO at MM and UV Wavelengths and Diverse Comments on Interstellar Diffuse Lines
McNally, D.
The directions of stars known to exhibit the molecule CN in their interstellar spectra were searched for CO at both millimeter and ultraviolet wavelengths in order to obtain more information about moderately dense interstellar material, which is of value in ascertaining the dynamics of star formation. Results show that where both CO and CN have be…