Search Publications
Dust Temperatures in the Infrared Space Observatory Atlas of Bright Spiral Galaxies
Bendo, George J.; Leech, Kieron; Metcalfe, Leo +11 more
We examine far-infrared and submillimeter spectral energy distributions for galaxies in the Infrared Space Observatory Atlas of Bright Spiral Galaxies. For the 71 galaxies where we had complete 60-180 µm data, we fitted blackbodies with λ-1 emissivities and average temperatures of 31 K or λ-2 emissivities and average te…
Observations of the SW Sextantis Star DW Ursae Majoris with the Far Ultraviolet Spectroscopic Explorer
Szkody, Paula; Hoard, D. W.; Long, Knox S. +2 more
We present an analysis of the first far-ultraviolet observations of the SW Sextantis type cataclysmic variable DW Ursae Majoris, obtained in 2001 November with the Far Ultraviolet Spectroscopic Explorer. The time-averaged spectrum of DW UMa shows a rich assortment of emission lines (plus some contamination from interstellar absorption lines includ…
The Early Ultraviolet Evolution of the ONeMg Nova V382 Velorum 1999
Gehrz, Robert D.; Bond, Howard E.; Krautter, Joachim +7 more
We present a multiwavelength study of the ONeMg Galactic nova V382 Velorum 1999 using HST/STIS and FUSE ultraviolet spectra and comparisons with published ground-based optical spectra. We find a close match to the basic phenomenology of another well-studied ONeMg nova, V1974 Cygni (Nova Cyg 1992), in particular, to the spectral development through…
A Hubble Space Telescope WFPC2 Investigation of the Nuclear Morphology in the Toomre Sequence of Merging Galaxies
Böker, Torsten; van der Marel, Roeland P.; Zabludoff, Ann I. +4 more
We report on the properties of nuclear regions in the Toomre sequence of merging galaxies, based on imaging data gathered with the Hubble Space Telescope WFPC2 camera. We have imaged the 11 systems in the proposed evolutionary merger sequence in the F555W and F814W broadband filters, and in Hα+[N II] narrowband filters. The broadband morphology of…
The z=2.51 Extremely Red Submillimeter Galaxy SMM J04431+0210
Ivison, R. J.; Frayer, D. T.; Smail, Ian +4 more
We report the redshift measurement for the submillimeter selected galaxy SMM J04431+0210 (N4) using the Near Infrared Spectrograph on the Keck II Telescope. The data show Hα, [N II] λλ6583, 6548, and [O III] λ5007 lines at a redshift of z=2.51. The high nuclear [N II]/Hα line ratio is consistent with a LINER or type II active galactic nucleus (AGN…
Searching for Bulges at the End of the Hubble Sequence
Böker, Torsten; van der Marel, Roeland P.; Stanek, Rebecca
We investigate the stellar disk properties of a sample of 19 nearby spiral galaxies with low inclination and late Hubble type (Scd or later). We combine our high-resolution Hubble Space Telescope I-band observations with existing ground-based optical images to obtain surface brightness profiles that cover a high dynamic range of galactic radii. Mo…
Absorption-Line Systems and Galaxies in Front of the Second-brightest Quasar, PHL 1811
Bowen, David V.; Tripp, Todd M.; Jenkins, Edward B. +4 more
The extraordinarily bright quasar PHL 1811, at a redshift zem=0.192, provides an attractive opportunity to use ultraviolet absorption-line spectroscopy to study the properties of gas systems in the local universe. A short (11.3 ks), exploratory spectrum of this object was obtained by the Far Ultraviolet Spectroscopic Explorer (FUSE) wit…
The Luminosity Function of the Large Magellanic Cloud Globular Cluster NGC 1866
Walker, A. R.; Castellani, V.; Brocato, E. +2 more
We present Hubble Space Telescope VI photometry of the central region of the Large Magellanic Cloud cluster NGC 1866, reaching magnitudes as faint as V=27. We find evidence that the cluster luminosity function shows a strong dependence on the distance from the cluster center, with a clear deficiency of low-luminosity stars in the inner region. We …
The Compact Nucleus of the Deep Silicate Absorption Galaxy NGC 4418
Scoville, N. Z.; Matthews, K.; Soifer, B. T. +6 more
High-resolution Hubble Space Telescope (HST) near-infrared and Keck mid-infrared images of the heavily extinguished infrared-luminous galaxy NGC 4418 are presented. These data make it possible to observe the imbedded near-infrared structure on scales of 10-20 pc and to constrain the size of the mid-infrared-emitting region. The 1.1-2.2 µm da…
The Stellar Content of the Bulge of M31
Rich, R. Michael; Jablonka, Pascale; Frogel, Jay A. +6 more
We analyze the stellar populations present in M31 by using nine sets of adjacent Hubble Space Telescope NICMOS camera 1 and 2 fields with galactocentric distances ranging from 2' to 20'. These infrared observations provide some of the highest spatial resolution measurements of M31 to date; our data place tight constraints on the maximum luminositi…