Search Publications
A Complete Atlas of Recalibrated Hubble Space Telescope Faint Object Spectrograph Spectra of Active Galactic Nuclei and Quasars. I. Pre-COSTAR Spectra
Koratkar, Anuradha P.; Evans, Ian N.
We have recalibrated all nonpolarimetric, pre-COSTAR, archival Hubble Space Telescope Faint Object Spectrograph UV and optical spectrophotometry of active galaxies and quasars in order to extract uniformly calibrated spectrophotometric data for further detailed scientific investigations. The raw archival spectra have been recalibrated using the la…
Heavy Element Abundances in Late-B and Early-A Stars. I. Co-Added IUE Spectra of HgMn Stars
Leckrone, D. S.; Wahlgren, G. M.; Adelman, S. J. +2 more
Very heavy elements (Pt, Au, Hg, Tl, and Bi) are found to be enhanced in the atmospheres of the chemically peculiar stars of the upper main sequence by up to a million times the solar system levels. Such enhancements are believed to result from atmospheric dynamics (i.e., diffusion) rather than scenarios that dredge up nuclear-processed material t…
An Atlas of Far-Ultraviolet Spectra of Wolf-Rayet Stars from the FUSE Satellite
Walborn, Nolan R.; Sonneborn, George; Hutchings, John B. +5 more
We present an atlas of far-ultraviolet spectra of 21 Wolf-Rayet (WR) stars in the Galaxy and Large and Small Magellanic Clouds, secured with the Far Ultraviolet Spectroscopic Explorer (FUSE) satellite. The data cover the wavelength range of 912-1190 Å at a spectral resolution of 0.1 Å and span examples of most subtypes in the WN and WC sequences. …
Spectral Classification of Stars in A Supplement to the Bright Star Catalogue
Abt, Helmut A.
MK spectral types are given for about 584 stars in A Supplement to the Bright Star Catalogue. These are compared with Hipparcos parallaxes to check the reliability of those classifications. The estimated errors are +/-1.2 subtypes, and 10% of the luminosity classes may be wrong.
Classification of Spectra from the Infrared Space Observatory PHT-S Database
Kraemer, Kathleen E.; Price, Stephan D.; Walker, Helen J. +1 more
We have classified over 1500 infrared spectra obtained with the PHT-S spectrometer aboard the Infrared Space Observatory according to the system developed for the Short Wavelength Spectrometer (SWS) spectra by Kraemer et al. The majority of these spectra contribute to subclasses that are either underrepresented in the SWS spectral database or cont…
Spitzer Space Telescope View of Diffuse Near-Infrared Continuum Emission in the Galaxy
Lu, Nanyao
The Infrared Array Camera (IRAC) multiband images from the Spitzer Space Telescope First Look Survey of two 1deg×5' areas of diffuse interstellar medium (ISM) are used to study the near-infrared (NIR; 2-5 µm) continuum emission and its relation to the mid-infrared (6-10 µm) aromatic features in emission (AFEs). We…
Spitzer Space Telescope Observations of the Aftermath of Microlensing Event MACHO-LMC-5
Stern, Daniel; Kallivayalil, Nitya; Nguyen, Hien T. +3 more
We have carried out photometry of the microlensing event MACHO-LMC-5 with Spitzer Infrared Array Camera (IRAC) 10 years after the magnification of the LMC source star was recorded. This event is unique in the annals of gravitational microlensing: the lensing star itself has been observed using the Hubble Space Telescope (once with WFPC2 and twice …
Keck Adaptive Optics Imaging of 0.5 < z < 1 Field Galaxies from the Hubble Space Telescope Archive
Faber, S. M.; Koo, D. C.; Larkin, J. E. +6 more
We have employed natural guide star adaptive optics (AO) on the Keck II telescope to obtain near-infrared (H and K') images of three field galaxies, each of redshift greater than 0.5. These are among the highest-redshift non-active disk galaxies to be imaged with AO. Each of the galaxies was chosen because it had been observed previously with the …
Preliminary Orbits for Eight Visual Binaries
Ling, J. F.
This paper reports orbits and masses calculated for the visual binary stars WDS 00427-6537 (I440), WDS 01084-5515 (RST 1205 AB), WDS 01343-0827 (A314), WDS 03590+0947 (HU 27), WDS 10287+4558 (A1993), WDS 12429+0516 (A1602), WDS 20157+4339 (A2095 AB), and WDS 22180-6249 (I20). All the orbits have previously been announced in IAU Commission 26 Infor…
ISOCAM Observations of Globular Clusters in the Magellanic Clouds: The Data
Sauvage, M.; Onaka, T.; Tanabé, T. +2 more
Seventeen globular clusters in the Large and Small Magellanic Clouds were observed in the mid-infrared wavelength region with the ISOCAM instrument on board the Infrared Space Observatory (ISO). Observations were made using the broadband filters LW1, LW2, and LW10, corresponding to the effective wavelengths of 4.5, 6.7, and 12 µm, respective…