2001/08/06 by Kenneth R. Sembach, Sembach, Kenneth R.
Physics and Astronomy · #Astrophysics (astro-ph) #Astrophysics and Star Formation Studies #FOS: Physical sciences #Gamma-ray bursts and supernovae #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0108088
9 pages, 4 figures, uses newpasp.sty, to appear in "Extragalactic Gas at Low Redshift", eds. J.S. Mulchaey & J.T. Stocke, ASP Conference Series, in press (2002); minor changes, including correction to caption for Figure 3
openalex publication_date 2001/08/06 · arxiv created 2001/09/21 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Our view of the high velocity cloud (HVC) system is changing dramatically with new observations from the Far Ultraviolet Spectroscopic Explorer mission and the Space Telescope Imaging Spectrograph onboard the Hubble Space Telescope. In particular, the detection of O VI absorption indicates that many HVCs have a hot, collisionally-ionized component in addition to the neutral gas detected in H I 21cm emission. A better understanding of the ionization of this gas will help to determine the distances of some HVCs, as well as constrain the properties of a hot Galactic corona or Local Group medium. In this article, I briefly summarize some recent observations of O VI HVCs.