The Lyβ and O VI Forest in the Local Universe

Details The Lyβ and O VI Forest in the Local Universe The Lyβ and O VI Forest in the Local Universe

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aspc..348..357d&link_type=abstract

Astrophysics in the Far Ultraviolet: Five Years of Discovery with FUSE ASP Conference Series, Vol. 348, Proceedings of the Confe

Astronomy and Astrophysics

Astrophysics

Scientific paper

Intergalactic absorbers along lines of sight to distant quasars are a powerful diagnostic for the evolution and content of the IGM. In this study, we search known low-z Lyα absorption systems for equivalent absorption in higher Lyman lines as well as the important metal ions O VI and C III. O VI absorption is detected roughly half the time and shows a smaller range of column density than H I. This implies a multi-phase IGM with warm neutral and hot, ionized components. We use our O VI detection statistics to determine that the fraction of intergalactic mass at 105-6 K is at least 5% of the total baryonic mass in the local universe.

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