Search Publications
The Relationship between Stellar Light Distributions of Galaxies and Their Formation Histories
Conselice, Christopher J.
A major problem in extragalactic astronomy is the inability to distinguish in a robust, physical, and model-independent way how galaxy populations are physically related to each other and to their formation histories. A similar, but distinct, and also long-standing question is whether the structural appearances of galaxies, as seen through their s…
A Hubble Space Telescope Survey of Extended [O III] λ5007 Emission in a Far-Infrared Selected Sample of Seyfert Galaxies: Observations
Hutchings, J. B.; Schmitt, H. R.; Donley, J. L. +2 more
We present a Hubble Space Telescope (HST) survey of extended [O III] emission for a sample of 60 Seyfert galaxies (22 Seyfert 1 galaxies and 38 Seyfert 2 galaxies), selected based on their far-infrared properties. The observations for 42 of these galaxies were done in a snapshot survey with WFPC2. The remaining 18 were obtained from the HST archiv…
Circumnuclear Dust in Nearby Active and Inactive Galaxies. I. Data
Pogge, Richard W.; Mulchaey, John S.; Martini, Paul +1 more
The detailed morphology of the interstellar medium (ISM) in the central kiloparsec of galaxies is controlled by pressure and gravitation. The combination of these forces shapes both circumnuclear star formation and the growth of the central, supermassive black hole. We present visible and near-infrared Hubble Space Telescope images and color maps …
Chandra X-Ray Observations of the Spiral Galaxy M81
Wu, Kinwah; Tennant, Allyn F.; Swartz, Douglas A. +3 more
A Chandra X-Ray Observatory ACIS-S imaging observation is used to study the population of X-ray sources in the nearby Sab galaxy M81 (NGC 3031). A total of 177 sources are detected with 124 located within the D25 isophote to a limiting X-ray luminosity of ~3×1036 ergs s-1. Source positions, count rates, luminositie…
An Imaging Survey of Early-Type Barred Galaxies
Erwin, Peter; Sparke, Linda S.
This paper presents the results of a high-resolution imaging survey, using both ground-based and Hubble Space Telescope images, of a complete sample of nearby barred S0-Sa galaxies in the field, with a particular emphasis on identifying and measuring central structures within the bars: secondary bars, inner disks, nuclear rings and spirals, and of…
High-Resolution Observations of Interstellar Ca I Absorption-Implications for Depletions and Electron Densities in Diffuse Clouds
Welty, Daniel E.; Hobbs, L. M.; Morton, Donald C.
We present high-resolution (FWHM~0.3-1.5 km s-1) spectra, obtained with the AAT UHRF, the McDonald Observatory 2.7 m coudé spectrograph, and/or the KPNO coudé feed, of interstellar Ca I absorption toward 30 Galactic stars. Comparisons of the column densities of Ca I, Ca II, K I, and other species-for individual components identified in …
Space Telescope Imaging Spectrograph Spectroscopy of the Emission-Line Gas in the Nuclei of Nearby FR-I Galaxies
Baum, Stefi A.; O'Dea, Christopher P.; van der Marel, Roeland P. +4 more
We present the results of the analysis of a set of medium-resolution spectra, obtained by the Space Telescope Imaging Spectrograph on board the Hubble Space Telescope, of the emission-line gas present in the nuclei of a complete sample of 21 nearby, early-type galaxies with radio jets (the UGC FR-I Sample). For each galaxy nucleus we present spect…
Emission-Line Galaxies in the Space Telescope Imaging Spectrograph Parallel Survey. I. Observations and Data Analysis
Gardner, Jonathan P.; Teplitz, Harry I.; Rhodes, Jason +5 more
In the first 3 years of operation the Space Telescope Imaging Spectrograph (STIS) obtained slitless spectra of ~2500 fields in parallel to prime Hubble Space Telescope (HST) observations as part of the STIS parallel survey (SPS). The archive contains ~300 fields at high Galactic latitude (b>30deg) with spectroscopic exposure times gr…
The Complete Far Ultraviolet Spectroscopic Explorer Spectrum of the Small Magellanic Cloud Star Sk 108
Mallouris, Christoforos
The complete FUSE spectrum of the SMC Wolf-Rayet binary star Sk 108 is presented. The spectrum covers the 905-1186 Å wavelength range at a resolution of about 12,500 and a S/N of 25-50. Detailed component information from higher resolution, UV and optical spectra is used to model the far-UV absorption lines of the ISM in the Galaxy and SMC, and sp…