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Radio Galaxy 3C 230 Observed with Gemini Laser Adaptive-optics Integral-field Spectroscopy
Steinbring, Eric
The Altair laser-guide-star adaptive optics facility combined with the near-infrared integral-field spectrometer on Gemini North have been employed to study the morphology and kinematics of 3C 230 at z = 1.5, the first such observations of a high-redshift radio galaxy. These suggest a bi-polar outflow spanning 0farcs9 (~16 kpc projected distance f…
Observations and Orbital Analysis of the Giant White Dwarf Binary System HR 5692
Torres, Guillermo; Latham, David W.; Stefanik, Robert P. +3 more
We report spectroscopic observations of the red giant star HR 5692, previously known to be a binary system both from other spectroscopic work and from deviations in the astrometric motion detected by the Hipparcos satellite. Earlier International Ultraviolet Explorer (IUE) observations had shown the presence of a hot white dwarf companion to the g…
Identification of a Complete 160 µm Flux-limited Sample of Infrared Galaxies in the ISO Lockman Hole 1 deg2 Deep Fields: Source Properties and Evidence for Strong Evolution in the FIR Luminosity Function for ULIRGs
Aussel, H.; Le Floc'h, E.; Veilleux, S. +13 more
We have identified a complete, flux-limited (S 160>120 mJy) sample of 160 µm selected sources from Spitzer observations of the 1 deg2 Infrared Space Observatory (ISO) Deep Field region in the Lockman Hole (LH). Ground-based UV, optical, and near-infrared (NIR) photometry and optical spectroscopy have been used to det…
New Precision Orbits of Bright Double-lined Spectroscopic Binaries. VII. 47 Andromedae, 38 Cassiopeiae, and HR 8467
Williamson, Michael H.; Fekel, Francis C.; Pourbaix, Dimitri +1 more
Improved orbital elements for three double-lined spectroscopic binaries, 47 And, 38 Cas, and HR 8467, have been determined with extensive new radial velocities. For 38 Cas lines of the secondary have been detected for the first time. Given the orbital periods for these systems of 35.3682, 134.130, and 42.3813 days, respectively, it is not surprisi…
The Dynamical Distance, RR Lyrae Absolute Magnitude, and Age of the Globular Cluster NGC 6266
McNamara, Bernard J.; McKeever, Jean
The internal proper motion dispersion of NGC 6266 was measured using Hubble Space Telescope Wide Field Planetary Camera 2 images with an epoch difference of eight years. The dispersion was found to be 0.041 ± 0.001 arcsec century -1. This value was then equated to the cluster's radial velocity dispersion of 13.7 ± 1.1 km s-1 …
CSO Bolocam 1.1 mm Continuum Mapping of the Braid Nebula Star Formation Region in Cygnus OB7
Pyo, Tae-Soo; Smith, Michael D.; Aspin, Colin +9 more
We present a 1.1 mm map of the Braid Nebula star formation region in Cygnus OB7 taken using Bolocam on the Caltech Submillimeter Observatory. Within the 1 deg2 covered by the map, we have detected 55 cold dust clumps all of which are new detections. A number of these clumps are coincident with IRAS point sources although the majority ar…
A Search for Satellites around Ceres
Russell, C. T.; Stern, S. A.; Young, E. F. +5 more
We conducted a satellite search around the dwarf planet 1 Ceres using Hubble Space Telescope and ground-based Palomar data. No candidate objects were found orbiting Ceres in its entire stability region down to ~500 km from the surface of Ceres. Assuming a satellite would have the same albedo as Ceres, which has a visual geometric albedo of 0.07-0.…
Nongravitational Forces on Comets: An Extension of the Standard Model
Mysen, E.; Aksnes, K.
The accuracy of comet orbit computations is limited by uncertain knowledge of the recoil force due to outgassing from the nuclei. The standard model assumes an exponential dependence of the force on distance from the Sun. This variable force times constants A 1, A 2, and A 3 represents the radial, transverse, and n…
Multi-wavelength Observations of a Sample of Intermediate-luminosity Radio-loud Active Galaxies
Eracleous, Michael; Lewis, Karen T.; Sambruna, Rita M. +3 more
We present the results from exploratory (12-23 ks) XMM-Newton observations of six optically selected, radio-loud active galactic nuclei (AGNs), together with new radio data and a reanalysis of their archival SDSS spectra. The sources were selected in an effort to expand the current sample of radio-loud AGNs suitable for detailed X-ray spectroscopy…