Studying hot gas using the ultraviolet: High ions in galactic halos

Details Studying hot gas using the ultraviolet: High ions in galactic halos Studying hot gas using the ultraviolet: High ions in galactic halos

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009ap%26ss.320...27f&link_type=abstract

Astrophysics and Space Science, Volume 320, Issue 1-3, pp. 27-30

Astronomy and Astrophysics

Astrophysics

Intergalactic Medium, Quasars: Absorption Lines, Galaxies: Halos, Galaxies: High-Redshift

Scientific paper

Among the many spectral lines falling in the ultraviolet are the resonance doublets of the highly ionized species O VI, N V, C IV, and Si IV. By using both space-based UV observations and ground-based optical observations, these lines can be used to trace diffuse astrophysical plasma over a large fraction of the age of the Universe. In this paper we discuss observations of these absorption lines in damped Lyman- α systems at z≈2-3, using the UVES spectrograph on the VLT in Chile.

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