7 papers
Inferring coronal structure using X-ray spectra: A Chandra study of AB Dor
G. A. J. Hussain, N. S. Brickhouse, A. K. Dupree +5
The Chandra X-ray observatory monitored the single cool star, AB Doradus, continuously for a period lasting 88ksec (1.98 Prot) in 2002 December with the LETG/HRC-S. The X-ray light…
FUSE Observations of the Symbiotic Star AG Draconis
P. R. Young, A. K. Dupree, B. R. Espey +2
Spectra of the bright symbiotic star AG Draconis (BD+67D922) in the wavelength range 905-1187 A obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE) are presented. The s…
Spatially Resolved STIS Spectroscopy of Betelgeuse's Outer Atmosphere
A. Lobel, J. Aufdenberg, A. K. Dupree +3
We present spatially resolved spectra observed with HST-STIS of the upper chromosphere and dust envelope of Alpha Orionis (M2 Iab). In the fall of 2002 a set of five high-resolutio…
The Millennium Outburst of the Cool Hypergiant Rho Cassiopeiae: Spectroscopy and Modeling
A. Lobel, A. K. Dupree, R. P. Stefanik +7
Between 2000 June and September an exceptional variability phase occurred in the peculiar F-type hypergiant Rho Cas, when the V-brightness dimmed by at least a full magnitude. The…
FUSE Observations of Capella
P. R. Young, A. K. Dupree, B. E. Wood +4
Far Ultraviolet Spectroscopic Explorer FUSE observations of the bright binary system Capella (Alpha Aurigae; G1 III + G8 III) reveal a rich emission line spectrum containing neutra…
FUSE Observations of the Active Cool Star AB Doradus
T. B. Ake, A. K. Dupree, P. R. Young +5
Far ultraviolet spectra were obtained of the active cool star AB Doradus (HD 36705) during the calibration and checkout period of the FUSE satellite. Observations in this early pha…