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High Resolution Mid-Infrared Imaging of Radio Ultra-Compact HII Regions
Uriel Giveon, Matthew J. Richter, Robert H. Becker +1
We present data from mid-infrared Keck Telescope imaging of 18 radio-selected ultra-compact HII region candidates at diffraction-limited resolution. The goal of these observations…
A New Radio Catalog of Compact HII Regions in the Milky Way II. The 1.4 GHz Data
U. Giveon, R. H. Becker, D. J. Helfand +1
We utilize a new VLA Galactic plane catalog at 1.4 GHz covering the first and second Galactic quadrants (340 deg <l< 120 deg, |b|<0.8 deg with |b|< 1.8 deg for 350 deg <l< 40 deg a…
A New Catalog of Radio Compact HII Regions in the Milky Way
Uriel Giveon, Robert H. Becker, David J. Helfand +1
We utilize new VLA Galactic plane catalogs at 5 and 1.4 GHz covering the first Galactic quadrant (350<l<42, |b|<0.4) in conjunction with the MSX6C Galactic plane catalog to constru…
The ISO Galactic Metallicity Gradient Revisited
Uriel Giveon, Christophe Morisset, Amiel Sternberg
Two independent groups (Giveon et al. 2002; Martin-Hernandez et al. 2002) have recently investigated the Galactic metallicity gradient as probed by ISO observations of mid-infrared…
The Excitation and Metallicity of Galactic HII Regions from ISO-SWS Observations of Mid-Infrared Fine-Structure Lines
Uriel Giveon, Amiel Sternberg, Dieter Lutz +2
We present mid-infrared ISO-SWS observations of the fine-structure emissions lines [NeII]12.8, [NeIII]15.6, [NeIII]36, [ArII]6.9, [ArIII]8.9, [SIII]18.7, [SIII]33.5, [SIV]10.5, and…
Monitoring of the optical and 2.5-11.7 micron spectrum and mid-IR imaging of the Seyfert 1 galaxy Mrk279 with ISO
The AGN Watch collaboration, M. Santos-Lleo, J. Clavel +19
Mid-infrared images of the Seyfert 1 galaxy Mrk 279 obtained with the ISO satellite are presented together with the results of a one-year monitoring campaign of the 2.5-11.7 micron…