Search Publications
Ultraviolet-Excess Selection of the Counterpart to a Globular Cluster X-Ray Burster: Hubble Space Telescope Images of the Core of NGC 6712
Anderson, Scott F.; Margon, Bruce; Deutsch, Eric W. +1 more
Using the Planetary Camera on the Hubble Space Telescope, we have obtained high spatial resolution, multicolor images and photometry of the core of the globular cluster NGC 6712. A comparison of our blue and ultraviolet images unambiguously reveals a faint (B = 21), UV-excess object, 'star S', within the Einstein error box for the bursting X-ray s…
Spectroscopic Observations of V443 Herculis: A Symbiotic Binary With Low Mass White Dwarfs
Mikolajewska, Joanna; Kenyon, Scott J.; Dobrzycka, Danuta
We present an analysis of new and existing photometric and spectroscopic observations of the symbiotic binary V443 Herculis. This binary system consists of a normal M5 giant and a hot compact star. These two objects have comparable luminosities: about 1500 solar for the M5 giant and about 1000 solar for the compact star. We identify three nebular …
Absolute Proper Motion and Space Motion of the Globular Cluster M15
Le Campion, J. -F.; Odenkirchen, M.; Geffert, M. +1 more
We have separated cluster members and field stars for stars in a region around the globular cluster M 15. The membership of ultraviolet bright stars of M 15 is discussed. The absolute proper motion of M 15 has been determined with respect to the PPM catalogue. An extragalactic calibration of the proper motions has been performed. The calibration w…
Observations of 3C 273 With the Goddard High Resolution Spectrograph on the Hubble Space Telescope
Savage, B. D.; Ebbets, D. C.; Carpenter, K. G. +21 more
The observations of the quasar 3C 273 taken with the Goddard High Resolution Spectrograph in 1991 February are presented here. We have included both the reduced raw data, and smoothed and deconvolved spectra. Also, a list of observed absorption lines is presented. The data comprise 11 spectra, including 1 low resolution observation and 10 medium r…
Detection of a White Dwarf Compensation to the Hyades Stars HD 27483
Boehm-Vitense, Erika
We observed with IUE a white dwarf (WD) companion to the Hyades F6 V binary stars HD 27483. This system is known to be a close binary of two nearly equal stars with an orbital period of 3.05 days. Our IUE observations revealed the presence of a third star, a white dwarf with an effective temperature of 23,000 +/- 1000 K and a mass of approximately…
The Optical Jet in Markarian 463
Ford, H. C.; Cohen, Ross D.; Evans, I. N. +4 more
Hubble Space Telescope images of Markarian 463, an interacting Seyfert 2 galaxy, reveal an optical jet 0.84 arcsec long at position angle PA~182^deg^ originating at the Seyfert nucleus. The jet terminates at a radio point source 1.2 arcsec from the nucleus. Previous polarization observations and our filter photometry suggests that the jet may be t…
Extremely Active Long-Period RS CVn Binary HD 12545
Fekel, Francis C.; Aufdenberg, Jason P.; Bopp, Bernard W. +2 more
The active-chromosphere giant HD 12545 is noteworthy for its remarkable 1990 photmetric amplitude of 0.6 mag in V, which implies that nearly half the visible hemisphere of the star was covered by cool spots. We report the results of a spectroscopic study of HD 12545, showing it to be an active-chromosphere binary with an orbital period of 23.97 da…
Wind Variability in the Large Magellanic Cloud B[e] Supergiant HD 34664
Clayton, G. C.; Schulte-Ladbeck, R. E.
We present optical linear spectropolarimetry of the B[e] supergiant HD 34664. The polarization and position angle display significant spectral features which correspond to the Hα and Hβ emission lines. We use the line polarizations to separate the interstellar foreground polarization from the intrinsic polarization of HD 34664. The intrinsic polar…
Deep Hubble Space Telescope Imaging of 53WO44: an SO Radio Galaxy at z=0.311
Keel, William C.; Windhorst, Rogier A.
We present images with the Wide-Field Camera (WFC) and Faint-Object Camera (FOC) of the radio galaxy 53W044, as part of a morphological study of the faint radio-source population. The WFC images are used to examine the structure of the galaxy, and show evidence for a significant disk (contributing 18%-20% of the light in the observed V and I bands…
The Onset of Wolf-Rayet Wind Outflow and the Nature of the Hot Component in the Symbiotic Nova PU Vulpecula
Sion, Edward M.; Shore, Steven N.; Scheible, Maureen P. +1 more
We have analyzed temporal variations in the far ultraviolet He II (1640), Si IV (1393, 1402), and C IV (1548, 1550) line profiles in eight high dispersion, International Ultraviolet Explorer Short Wavelength Prime spectra of the symbiotic nova PU Vul by comparatively examining these profiles on a common velocity scale. We see clear evidence of the…