Search Publications
An All-Sky Atlas of Radio/X-ray Associations
Flesch, E.
An all-sky comprehensive catalogue of calculated radio and X-ray associations to optical objects is presented. Included are X-ray sources from XMM-Newton, Chandra and ROSAT catalogues, radio sources from NVSS, FIRST and SUMSS catalogues, and optical data, identifications and redshifts from the APM, USNO-A, SDSS-DR7 and the extant literature. This …
A Direct Detection of Gas Accretion: The Lyman Limit System in 3C 232
Danforth, Charles W.; Stocke, John T.; Keeney, Brian A.
The gas added to and removed from galaxies over cosmic time greatly affects their stellar populations and star formation rates. QSO absorption line studies in close QSO/galaxy pairs create a unique opportunity to study the physical conditions and kinematics of this gas. Here we present new Hubble Space Telescope (HST) images of the QSO/galaxy pair…
A FUSE View of Winds from the Central Stars of Planetary Nebulae
Guerrero, Martín A.; Ramos-Larios, Gerardo; Massa, Derck
Since the IUE satellite produced a vast collection of high-resolution UV spectra of the central stars of planetary nebulae (CSPNe), there has not been any further systematic study of the stellar winds of these stars. The high spectral resolution, sensitivity and large number of archival observations in the FUSE archive allow the study of the stell…
Spatially Resolved Spectroscopy of Starburst and Post-Starburst Galaxies in the Rich z~0.55 Cluster CL 0016+16 1
Kuntschner, Harald; Couch, Warrick J.; Pracy, Michael B.
We have used the Low Resolution Imaging Spectrograph on the W. M. Keck I telescope to obtain spatially resolved spectroscopy of a small sample of six `post-starburst' and three `dusty-starburst' galaxies in the rich cluster CL 0016+16 at z=0.55. We use this to measure radial profiles of the Hδ and [OII]λ3727 lines which are diagnostic probes of th…
A Survey of IUE Spectra of the Active Binary System UX Arietis
Ekmekçi, Fehmi
To investigate the ultraviolet (UV) activity of the bright, non-eclipsing, double-lined spectroscopic binary system UX Ari, IUE spectra (194 images) were taken from the IUE archive. The spectra, obtained during the period 1978-1996, show emission lines originating in the chromosphere and transition region. The long-wavelength low dispersion spectr…