Search Publications
Herbig Haro Objects in the Orion Nebula.
Hartigan, Patrick; Axon, David J.; O'Dell, C. R. +4 more
We have used the Hubble Space Telescope to image two regions of the Orion Nebula in low and high ionization emission lines. There appear to be two main systems of Herbig Haro objects in the Orion nebula - a `North' System is centered slightly north of the BN and IRc2 sources, and a `South' System centered south of the Trapezium stars. The North Sy…
Ultraviolet Emission-line Ratios of Cataclysmic Variables
Kallman, Timothy R.; Mauche, Christopher W.; Lee, Y. Paul
We present a statistical analysis of the ultraviolet emission lines of cataclysmic variables (CVs) based on ~430 ultraviolet spectra of 20 sources extracted from the International Ultraviolet Explorer Uniform Low Dispersion Archive. These spectra are used to measure the emission-line fluxes of N V, Si IV, C IV, and He II and to construct diagnosti…
Adaptive Optics Infrared Imaging Polarimetry and Optical HST Imaging of Hubble's Variable Nebula (R Monocerotis/NGC 2261): A Close Look at a Very Young Active Herbig Ae/Be Star
Fazio, G. G.; Hora, J. L.; Close, L. M. +7 more
We present high-resolution (FWHM = 0.2") near-IR (J, H, and K') adaptive optics images of the Herbig Ae/Be star R Monocerotis. Optical Hubble Space Telescope (HST) WFPC2 PC camera archival images are also presented. For the first time, adaptive optics was utilized to make high-resolution (FWHM = 0.2") IR-imaging polarimetry maps of R Mon. In addit…
Volcanic Resurfacing of Io: Post-Repair HST Imaging
Gilmore, Diane; McGrath, Melissa A.; Spencer, John R. +4 more
In March 1994, we used the newly refurbished Hubble Space Telescope (HST) to obtain global imaging of Io at five wavelengths between 0.34 and 1.02 µm, with a spatial resolution of 160 km. The images provided the clearest view of Io since Voyager and the first systematic observations in the wavelength range 0.7-1.0 µm. We have produced …
The expansion of the envelope of Nova V1974 Cygni and the distance problem.
Chochol, D.; Hric, L.; Pribulla, T. +3 more
Available optical and UV spectroscopic, HST and radio imaging observations of the Nova V1974 Cygni were used to derive a kinematic model of the expansion of the nova shell. The nova shell consists of two major components: an outer fast tenuous low-mass envelope and an inner slow main high-mass envelope. The outer envelope, detected spectroscopical…
HST High-Resolution Images and Maps of Pluto
Stern, S. A.; Trafton, L. M.; Buie, M. W.
We have obtained Hubble Space Telescope (HST) images of Pluto at 410 and 278 nm which resolve numerous distinct albedo provinces on this planet. Our images were obtained using the Faint Object Camera (FOC) of the Hubble Space Telescope between 1994 June 20 and July 01. This dataset is the first longitudinally-complete, rotationally-resolved direct…
The UV/X-ray emission of the symbiotic star AG Draconis during quiescence and the 1994/1995 outbursts.
Greiner, J.; Altamore, A.; Stencel, R. E. +4 more
We present the results of an extensive campaign of coordinated X-ray (ROSAT) and UV (IUE) observations of the symbiotic star AG Dra during a long period of quiescence followed recently by a remarkable phase of activity characterized by two optical outbursts. The major optical outburst in June 1994 and the secondary outburst in July 1995 were cover…
Hubble Space Telescope Snapshot Survey of 3CR Radio Source Counterparts. II. Radio Galaxies with Z > 0.5
Baum, Stefi A.; McCarthy, Patrick J.; Sparks, William B. +5 more
We present images of 51 3CR radio galaxies with 0.5 < z < 2.5 obtained in the snapshot mode with the Hubble Space Telescope. The images are short exposures with the Planetary Camera and the F702W filter. A wide range of morphologies and surface brightness are seen on subarcsecond scales. Some are very strongly nucleated, and their light is m…
Magnetopause structure and the role of reconnection at the outer planets
Russell, C. T.; Szabo, A.; Le, G. +1 more
In situ measurements have been obtained at the magnetopause boundary of all the giant outer planets. The Jovian magnetopause was probed by Pioneers 10 and 11, Voyagers 1 and 2, Ulysses, and most recently by Galileo. Saturn was visited by Pioneer 11 and Voyagers 1 and 2, and Uranus and Neptune were visited by Voyager 2. The observations at Jupiter …
Flows and Dynamics in the Corona Observed with the Coronal Diagnostic Spectrometer (cds)
Harrison, R. A.; Kjeldseth-Moe, O.; Haugan, S. V. H. +5 more
EUV spectra obtained with the Coronal Diagnostic Spectrometer (CDS) on the Solar and Heliospheric Observatory (SOHO) show significant flows of plasma in active region loops, both at coronal and transition region temperatures. Wavelength shifts in the coronal lines Mgix 368 Å and Mgx 624 Å corresponding to upflows in the plasma reaching velocities …