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Fundamental Properties of the Highly Ionized Plasmas in the Milky Way
N. Lehner, W. F. Zech, J. C. Howk +1
The cooling transition temperature gas in the interstellar medium (ISM), traced by the high ions, Si IV, C IV, N V, and O VI, helps to constrain the flow of energy from the hot ISM…
Cosmic Origins Spectrograph Detection of Ne VIII Tracing Warm - Hot Gas Towards PKS 0405-123
Anand Narayanan, Blair D. Savage, Bart P. Wakker +7
We report on the detection of Ne VIII in the HST/Cosmic Origins Spectrograph spectrum of the intervening absorption system at z = 0.495096 towards PKS 0405-123. The high S/N COS sp…
Cosmic Origins Spectrograph and FUSE Observations of T ~ 10^5 K Gas In A Nearby Galaxy Filament
Anand Narayanan, Bart P. Wakker, Blair D. Savage +4
We present a detection of a broad Ly-alpha absorber (BLA) with a matching O VI line in the nearby universe. The BLA is detected at z = 0.01028 in the high S/N spectrum of Mrk 290 o…
O VI Absorbers Tracing Hot Gas Associated with a Pair of Galaxies at z = 0.167
B. D. Savage, A. Narayanan, B. P. Wakker +7
High signal-to-noise (S/N) observations of the QSO PKS 0405-123 (zem = 0.572) with the Cosmic Origins Spectrograph from 1134 to 1796 A with a resolution of 17 km s-1 are used to st…
Exploring the Origin and Fate of the Magellanic Stream with Ultraviolet and Optical Absorption
Andrew J. Fox, Bart P. Wakker, Jonathan V. Smoker +3
(Abridged) We present an analysis of ionization and metal enrichment in the Magellanic Stream (MS), the nearest gaseous tidal stream, using HST/STIS and FUSE ultraviolet spectrosco…
Highly Ionized Plasma in the Halo of a Luminous Spiral Galaxy Near z=0.225
Anand Narayanan, Blair D. Savage, Bart P. Wakker
We present analyses of the physical conditions in the z=0.22496 and z=0.22638 multi-phase O VI absorption systems detected in the ultraviolet HST/STIS and FUSE spectra of the quasa…