Search Publications
A Deep Atmospheric Eclipse of AL Velorum
Eaton, J. A.
I have obtained new International Ultraviolet Explorer (IUE) observations in 1992 to search for an accretion column in and to analyze an atmospheric eclipse of AL Vel, a low luminosity zeta Aurigae binary. Rich shell spectra recorded at three phases of atmospheric eclipse give column densities and excitation temperatures for the chromospheric gas.…
S MUS B Revisited
Evans, Nancy Remage; Massa, Derck; Teays, Terry J.
IUE high dispersion spectra have been used to investigate the spectral type of the companion of the classical Cepheid S Mus, using Si II and III lines near 1300 A. In addition, the energy distribution from 1200 to 3200 A from IUE low resolution spectra has also been compared with standard stars. The resulting spectral type is B3.5 V (with a redden…
The Binary System Containing the Classical Cepheid T MON
Evans, Nancy Remage; Lyons, Ronald W.
Several new results are presented for the binary system containing the 27d classical Cepheid T Mon. New radial velocities for the Cepheid have been obtained, which confirm the decreasing orbital motion at the current epoch. The spectral type of the companion (B9.8 V) has been determined from an International Ultraviolet Explorer (IUE) l…
The Wind of EG Andromedae is not Dust Driven
Dgani, Ruth; Noriega-Crespo, Alberto; van Buren, Dave
The symbiotic star EG Andromedae has recently been the subject of several studies investigating its wind properties. Late-type giants are usually considered to have winds driven by radiation pressure on dust. Indeed, the derived wind velocity for EG Andromedae is consistent with this model. We point out here that there is no appreciable dust opaci…
Search for CO Absorption Bands in IUE Far-Ultraviolet Spectra of Cool Stars
Carpenter, K. G.; Robinson, R. D.; Gessner, S. E.
Observations of the red supergiant (M2 Iab) alpha Ori with the Goddard High Resolution Spectrograph (GHRS) on board the Hubble Space Telescope (HST) have provided an unambiguous detection of a far-ultraviolet (far-UV) chromospheric continuum on which are superposed strong molecular absorption bands. The absorption bands have been identified by Car…