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Far-Infrared Photometry of a Statistical Sample of Late-Type Virgo Cluster Galaxies
Tuffs, Richard J.; Popescu, Cristina C.; Pierini, Daniele +6 more
We present deep diffraction-limited far-infrared (FIR) strip maps of a sample of 63 galaxies later than S0 and brighter than BT=16.8, selected from the Virgo Cluster Catalogue of Binggeli, Sandage, & Tammann. The ISOPHOT instrument on board the Infrared Space Observatory was used to achieve sensitivities typically an order of magnit…
Revised Coordinates and Proper Motions of the Stars in the Luyten Half-Second Catalog
Bakos, Gáspár Á.; Sahu, Kailash C.; Németh, Péter
We present refined coordinates and proper-motion data for the high proper-motion (HPM) stars in the Luyten Half-Second (LHS) catalog. The positional uncertainty in the original Luyten catalog is typically greater than 10" and is often greater than 30". We have used the digital scans of the POSS I and POSS II plates to derive more accurate position…
A Uniform Analysis of the Lyα Forest at z = 0-5. III. Hubble Space Telescope Faint Object Spectrograph Spectral Atlas
Bechtold, Jill; Tran, Kim-Vy; Dobrzycki, Adam +5 more
We analyzed the absorption line spectra of all quasars observed with the high-resolution gratings of the Faint Object Spectrograph on board the Hubble Space Telescope. We examined 788 spectra for 334 quasars and present line lists and identifications of absorption lines in the spectra of 271 of them. Analysis of the statistics of the Lyα and metal…
Emission Line Properties of Active Galactic Nuclei from a pre-COSTAR Faint Object Spectrograph Hubble Space Telescope Spectral Atlas
Green, Paul J.; Forster, Karl; Koratkar, Anuradha +3 more
UV/optical emission lines offer some of the most detailed information obtainable about the intrinsic properties of quasars. Studies of the density, ionization and metal abundance of gas near the accreting black hole are probed through an intriguing but poorly understood complex of correlations between emission lines and overall quasar spectral ene…
Abundances of Deuterium, Nitrogen, and Oxygen toward HZ 43A: Results from the FUSE Mission
Kruk, J. W.; Sembach, K. R.; Sonneborn, G. +12 more
We present an analysis of interstellar absorption along the line of sight to the nearby white dwarf star HZ 43A. The distance to this star is 68+/-13 pc, and the line of sight extends toward the north Galactic pole. Column densities of O I, N I, and N II were derived from spectra obtained by the Far Ultraviolet Spectroscopic Explorer (FUSE), the c…
Ultraviolet Hubble Space Telescope Snapshot Survey of 3CR Radio Source Counterparts at Low Redshift
Baum, Stefi A.; O'Dea, Christopher P.; Sparks, William B. +6 more
We present UV images of 27 3CR radio galaxies with redshifts z<0.1 that have been imaged with the Space Telescope Imaging Spectrograph (STIS) on board the Hubble Space Telescope (HST). The observations employed the NUV MAMA and broadband filters with peak sensitivity at 2200 Å. We find that the UV luminosities show approximately a factor of 10-…
Deuterium Abundance toward WD 1634-573: Results from the FUSE Mission
Sembach, K. R.; Moos, H. W.; Linsky, J. L. +5 more
We use Far Ultraviolet Spectroscopic Explorer (FUSE) observations to study interstellar absorption along the line of sight to the white dwarf WD 1634-573 (d=37.1+/-2.6 pc). Combining our measurement of D I with a measurement of H I from Extreme Ultraviolet Explorer data, we find a D/H ratio toward WD 1634-573 of D/H=(1.6+/-0.5)×10-5. In…
Deuterium and Oxygen toward Feige 110: Results from the FUSE Mission
Sembach, K. R.; Sonneborn, G.; Moos, H. W. +11 more
We present measurements of the column densities of interstellar D I and O I made with the Far Ultraviolet Spectroscopic Explorer (FUSE) and of H I made with the International Ultraviolet Explorer (IUE) toward the sdOB star Feige 110 [(l,b)=(74.09d,-59.07d) d=179+265-67 pc; z=-154+57-227 pc]. Our determin…
Interstellar Deuterium, Nitrogen, and Oxygen Abundances toward BD +28°4211: Results from the FUSE Mission
Tripp, Todd M.; Jenkins, Edward B.; Sembach, Kenneth R. +12 more
High-resolution far-UV spectra of the O-type subdwarf BD +28°4211 were obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE) to measure the interstellar deuterium, nitrogen, and oxygen abundances in this direction. The interstellar D I transitions are analyzed down to Lyι at 920.7 Å. The star was observed several times at different targe…
Spectral Classification of the Hot Components of a Large Sample of Stars with Composite Spectra, and Implication for the Absolute Magnitudes of the Cool Supergiant Components.
Ginestet, N.; Carquillat, J. M.
A sample of 135 stars with composite spectra has been observed in the near-UV spectral region with the Aurélie spectrograph at the Observatoire de Haute-Provence. Using the spectral classifications of the cool components previously determined with near infrared spectra, we obtained reliable spectral types of the hot components of the sample system…