Search Publications
A Multiwavelength Perspective of Flares on HR 1099: 4 Years of Coordinated Campaigns
Ayres, Thomas R.; Brown, Alexander; Skinner, Stephen L. +7 more
We report on four years of multiple wavelength observations of the RS CVn system V711 Tau (HR 1099) from 1993, 1994, 1996, and 1998. This combination of radio, ultraviolet, extreme ultraviolet, and X-ray observations allows us to view, in the most comprehensive manner currently possible, the coronal and upper atmospheric variability of this active…
Heavy Element Abundances in Late-B and Early-A Stars. I. Co-Added IUE Spectra of HgMn Stars
Leckrone, D. S.; Wahlgren, G. M.; Adelman, S. J. +2 more
Very heavy elements (Pt, Au, Hg, Tl, and Bi) are found to be enhanced in the atmospheres of the chemically peculiar stars of the upper main sequence by up to a million times the solar system levels. Such enhancements are believed to result from atmospheric dynamics (i.e., diffusion) rather than scenarios that dredge up nuclear-processed material t…
An Atlas of Far-Ultraviolet Spectra of Wolf-Rayet Stars from the FUSE Satellite
Walborn, Nolan R.; Sonneborn, George; Hutchings, John B. +5 more
We present an atlas of far-ultraviolet spectra of 21 Wolf-Rayet (WR) stars in the Galaxy and Large and Small Magellanic Clouds, secured with the Far Ultraviolet Spectroscopic Explorer (FUSE) satellite. The data cover the wavelength range of 912-1190 Å at a spectral resolution of 0.1 Å and span examples of most subtypes in the WN and WC sequences. …