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The Surface Temperatures of White Dwarf Accretors in Dwarf Novae: The Active Dwarf Nova CN Orionis during Quiescence

Mittal, R.; Urban, J.; Lyons, K. +3 more

We have carried out a synthetic spectral analysis of five IUE NEWSIPS archival spectra of the peculiar, very active dwarf nova CN Orionis taken at the system's lowest flux levels during quiescence. AAVSO data indicate the visual magnitude V~14 for CN Ori at this time. On the assumption that the white dwarf contributes significantly to the far-UV l…

EC 11481-2303: A Peculiar Hot High-Gravity Pre-White Dwarf

O'Donoghue, Darragh; Sion, E. M.; Holberg, J. B. +6 more

We report the discovery of a peculiar new hot high-gravity predegenerate star, EC 11481-2303 from the Edinburgh-Cape Blue Object Survey, based upon the analysis of far-UV International Ultraviolet Explorer (IUE) echelle and low-resolution spectra and an optical spectrum. The IUE spectra reveal the presence of far-UV photospheric/circumstellar high…

The Ultraviolet Spectrum of VV Cephei Out of Eclipse

Bennett, Philip D.; Bauer, Wendy Hagen

The International Ultraviolet Explorer (IUE) satellite observed VV Cephei (M2 Iab+B?) over nearly a full 20.3 year orbital period, but all the observations were obtained outside total eclipse. Egress of the chromospheric eclipse was the only portion of the eclipse observed by IUE. We have examined all 124 high-resolution IUE spectra of VV Cephei a…

IUE Spectra and Emission-Line Fluxes for Eight Planetary Nebulae

Feibelman, Walter A.

We present IUE spectra and observed emission-line fluxes for the planetary nebulae NGC 2438, NGC 2610, NGC 5307, NGC 6620, NGC 7354, K3-27, PB 8, and He 2-182. All data have been processed by the final archive NEWSIPS routines. PB 8 and He 2-182 display strong C IV λ1549 P Cygni profiles from which terminal wind velocities of -2835+/-500 km s^…

Periodicities in the Ultraviolet Flux of α Orionis

Houck, J. R.; Hajian, Arsen R.; Terzian, Yervant +1 more

We have used low-resolution spectra from the International Ultraviolet Explorer (IUE) to look for periodicities in the ultraviolet flux from α Orionis. The total continuum flux for each observation was integrated, producing longwave (1900-3200 Å) and shortwave (1250-1750 Å) light curves. The periodograms resulting from the shortwave data are noise…